{"title":"7018 Welding Rods (Low-Hydrogen)","description":"\u003cp\u003eThe E7018 is the workhorse low-hydrogen electrode for structural steel. If your job calls for code-quality welds on mild or low-alloy steel — bridges, pressure vessels, structural fabrication, heavy equipment — the 7018 is almost certainly the rod your welding procedure specifies. The low-hydrogen flux system keeps diffusible hydrogen below 8 ml\/100g of deposited metal, dramatically reducing the risk of hydrogen-assisted cracking on restrained joints and higher-carbon base metals. When a procedure says \"low-hydrogen required,\" it means 7018 or equivalent.\u003c\/p\u003e\n\n\u003ch2\u003eWhat Does 7018 Mean? AWS Classification Decoded\u003c\/h2\u003e\n\u003cp\u003eThe E7018 designation under AWS A5.1 breaks down into four parts:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eE\u003c\/strong\u003e — Electrode (covered SMAW stick electrode)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e70\u003c\/strong\u003e — Minimum tensile strength of 70,000 psi (483 MPa) in the deposited weld metal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1\u003c\/strong\u003e — All-position usability (flat, horizontal, vertical, overhead). A \"2\" in this slot would indicate flat and horizontal only.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8\u003c\/strong\u003e — Flux type and current: low-hydrogen iron-powder coating, usable on DC+ (DCEP) and AC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe trailing letter codes you see on premium products — H4, H8, H16 — designate the maximum diffusible hydrogen content in milliliters per 100 grams of deposited weld metal. H4 (4 ml\/100g) is the lowest and is specified for the most crack-sensitive applications: thick sections of high-strength steel, restrained joints, and offshore or nuclear code work. H8 is the standard 7018 specification. MR (Moisture-Resistant) and XMR designators on Lincoln Excalibur products extend the out-of-oven exposure window under AWS D1.1 Annex I conditions.\u003c\/p\u003e\n\n\u003ch2\u003eChoosing a 7018 rod for your job\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAmperage range:\u003c\/strong\u003e 70–110 A for 3\/32 in; 100–150 A for 1\/8 in; 130–190 A for 5\/32 in; 200–275 A for 7\/32 in. Larger diameters run hotter for thick plate and high-deposition flat passes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePolarity:\u003c\/strong\u003e DC+ (DCEP) is standard; most 7018 electrodes also run on AC, making them compatible with transformer-style machines commonly found on job sites and in smaller shops.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJoint position:\u003c\/strong\u003e All-position — flat, horizontal, vertical-up, and overhead. Vertical-down is not recommended; the slag system is designed for upward progression only.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBase metal:\u003c\/strong\u003e A36, A572, A516, A514 (preheat required on higher-carbon grades), and other structural mild and low-alloy steels. Minimum deposit yield strength is 60,000 psi; tensile minimum is 70,000 psi.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTypical applications:\u003c\/strong\u003e Structural steel erection, pressure vessel fabrication, heavy equipment repair, shipbuilding, and any application governed by AWS D1.1 Structural Welding Code or ASME Section IX.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e7018 vs 6011 vs 6013: Which Stick Rod Should You Use?\u003c\/h2\u003e\n\u003cp\u003eThe three most common SMAW electrodes for mild steel each serve a different purpose. Choosing wrong wastes time and material — or worse, produces welds that don't meet code.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eE6010 \/ E6011\u003c\/strong\u003e — Fast-freeze cellulose-coated electrodes. Deep penetration, aggressive arc, runs on AC (6011) or DC (6010). Best for root passes on pipe, dirty\/rusty\/painted steel, and field repair where joint prep is impractical. Higher hydrogen content limits use on critical structural joints.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eE6013\u003c\/strong\u003e — Rutile-coated general-purpose electrode. Soft arc, easy to strike and restart, low spatter, excellent bead appearance. Best for thin-gauge sheet metal, light fabrication, hobby work, and applications where appearance matters more than penetration. Not low-hydrogen, not specified by structural codes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eE7018\u003c\/strong\u003e — Low-hydrogen iron-powder-coated electrode. Smooth arc, low spatter, dense slag that releases easily. Required for code-quality work on structural steel, pressure vessels, and any restrained or high-restraint joint. Must be kept dry — 7018 absorbs moisture quickly and re-introduced moisture defeats the low-hydrogen designation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor most shop fabrication and structural work, 7018 is the default. Use 6010\/6011 only for root passes or field repair where 7018 penetration is insufficient. Reach for 6013 only on light, non-critical sheet metal work. The full AWS digit system across all SMAW electrodes is decoded in the \u003ca href=\"\/blogs\/how-to-weld\/what-do-welding-rod-numbers-mean\"\u003eAWS classification guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eTypical Mechanical Properties and Chemistry (As Welded)\u003c\/h2\u003e\n\u003cp\u003eE7018 weld metal deposited from covered electrodes typically meets or exceeds these values:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTensile strength:\u003c\/strong\u003e 70,000–85,000 psi (483–586 MPa) — AWS minimum 70,000 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eYield strength:\u003c\/strong\u003e 58,000–72,000 psi (400–496 MPa) — AWS minimum 58,000 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElongation in 2 in:\u003c\/strong\u003e 22–30% — AWS minimum 22%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCharpy V-notch impact:\u003c\/strong\u003e 20 ft-lb at -20°F (27 J at -29°C) minimum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiffusible hydrogen:\u003c\/strong\u003e H4, H8, or H16 ml\/100g — see the H-designator on the product label\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTypical chemistry (weld deposit):\u003c\/strong\u003e 0.08% max C, 0.30–1.60% Mn, 0.75% max Si, low S\/P\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese values conform to ANSI\/AWS A5.1 \/ ASME SFA 5.1 specifications for E7018 covered electrodes. The Charpy impact requirement is what makes 7018 acceptable for low-temperature service and dynamic-load applications where brittle fracture is a concern.\u003c\/p\u003e\n\n\u003ch2\u003eWhat's in this collection\u003c\/h2\u003e\n\u003cp\u003eThis collection holds \u003cstrong\u003e39 active SKUs\u003c\/strong\u003e of Lincoln Electric 7018 electrodes, spanning diameters from 3\/32 in through 7\/32 in and package sizes from 3-pack 8 lb easy-open cans up to 50 lb production cans. Representative products include the \u003cem\u003eLincoln ED032877 Excalibur 7018 A1 MR\u003c\/em\u003e in 5\/32 x 14 in (50 lb can) — a moisture-resistant variant engineered for demanding structural applications — and the \u003cem\u003eLincoln ED037425 Excalibur 7018 XMR\u003c\/em\u003e in 3\/32 x 14 in, which delivers the tightest moisture-resistance specifications in the Excalibur lineup for the most critical low-hydrogen applications. All products are sourced directly from Lincoln Electric as an authorized distributor.\u003c\/p\u003e\n\n\u003cp\u003eFor a broader view of everything WeldingMart carries in the SMAW category, visit the \u003ca href=\"\/collections\/stick-welding-electrodes-rods\"\u003estick welding electrodes hub\u003c\/a\u003e. If your application demands higher tensile strength — quenched-and-tempered steels or chrome-moly pressure piping — the \u003ca href=\"\/collections\/8018-welding-rods\"\u003e8018 high-strength low-alloy rods\u003c\/a\u003e are the next step up in the strength ladder. For high-deposition pipe welding under AWS D1.1, see the \u003ca href=\"\/collections\/pipeliner-welding-rods\"\u003epipeliner electrodes\u003c\/a\u003e collection.\u003c\/p\u003e\n\n\u003ch2\u003eStorage, Rod Ovens, and Reconditioning\u003c\/h2\u003e\n\u003cp\u003eLow-hydrogen electrodes are extraordinarily sensitive to moisture. Once removed from their hermetically sealed can, 7018 electrodes begin absorbing atmospheric moisture, which dissociates into atomic hydrogen during welding and diffuses into the weld metal — directly defeating the low-hydrogen specification. Standard practice:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOpen and store at 250–300°F\u003c\/strong\u003e in a rod oven immediately after breaking the seal on a can.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExposure limit:\u003c\/strong\u003e Standard 7018 should not exceed 4 hours of ambient exposure before reconditioning per AWS D1.1 Annex I. MR-rated electrodes extend this to 9 hours; XMR extends it further.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReconditioning:\u003c\/strong\u003e Bake at 700–800°F for one hour to drive off absorbed moisture. Do not exceed 800°F — overheating damages the flux binder.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRejection criteria:\u003c\/strong\u003e Electrodes with damaged, cracked, or peeling flux must be discarded — they cannot be reconditioned to specification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor job-site work, a portable rod oven is mandatory for any code-quality 7018 application. Field exposure of an unprotected can in humid conditions can render the contents non-conforming within hours.\u003c\/p\u003e","products":[{"product_id":"lincoln-excalibur-7018-1-mr-3-32-x-14-in-smaw-welding-rod","title":"Lincoln Excalibur 7018-1 MR 3\/32 x 14 in SMAW Welding Rod","description":"\u003ch2\u003eLincoln Excalibur 7018-1 MR 3\/32 in — What Is E7018-1?\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eLincoln Excalibur 7018-1 MR\u003c\/strong\u003e (3\/32 x 14 in) is an \u003cstrong\u003eAWS A5.1\/A5.1M E7018-1 H4R\u003c\/strong\u003e iron powder\/low-hydrogen SMAW electrode with moisture-resistant coating for \u003cstrong\u003eDC+ (DCEP)\u003c\/strong\u003e in all positions. The \"-1\" suffix in E7018-1 is an AWS A5.1 designation specifying \u003cem\u003eenhanced notch toughness\u003c\/em\u003e — a minimum of 20 ft·lbf Charpy V-notch at −50°F, compared to −20°F for standard E7018. This colder impact rating makes Excalibur 7018-1 MR the required electrode for bridges under AWS D1.5, fracture-critical applications, cold climate structures in northern regions, pressure vessels requiring toughness at sub-zero temperatures, and any application where AWS D1.1 or project specifications explicitly designate E7018-1 for low-temperature fracture toughness. The 3\/32 in (2.4 mm) diameter provides precise control for root passes, thin plate, restricted-access joints, and all-position work requiring maximum hydrogen control and enhanced notch toughness simultaneously.\u003c\/p\u003e\u003ch2\u003eAWS Classification \u0026amp; Specifications\u003c\/h2\u003e\u003ctable style=\"min-width: 50px\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"min-width: 25px\"\u003e\n\u003ccol style=\"min-width: 25px\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS classification\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS A5.1\/A5.1M E7018-1 H4R\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eCoating type\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eIron powder \/ low-hydrogen (moisture-resistant)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eRod diameter\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e3\/32 in (2.4 mm)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eRod length\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e14 in (356 mm)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003ePolarity\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eDC+ (DCEP) preferred; AC acceptable\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eWelding positions\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAll positions: F, H, V, OH\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMin tensile strength\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e70,000 psi (483 MPa)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMin yield strength\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e58,000 psi (400 MPa)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eElongation\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e22% minimum\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eCharpy V-notch impact (KEY distinction)\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e20 ft·lbf at −50°F (vs. −20°F for standard E7018)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMax diffusible hydrogen\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e≤4 mL\/100g (H4 designation)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMoisture resistance\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eR designation (moisture-resistant coating)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eTypical current range\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e3\/32 in: 55–90 A\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eManufacturer\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eLincoln Electric\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eStandards compliance\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS A5.1\/A5.1M E7018-1 H4R\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBest Applications for Lincoln Excalibur 7018-1 MR 3\/32 in\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eAWS D1.5 bridge welding (root pass):\u003c\/strong\u003e AWS D1.5 Bridge Welding Code mandates E7018-1 over standard E7018 for fracture-critical tension member welds. The 3\/32 in diameter handles root pass applications in bridge girder CJP groove welds where access is restricted and precise root deposit control is required.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eFracture-critical member (FCM) welding:\u003c\/strong\u003e Any bridge tension member classified as fracture-critical by the engineer of record — the enhanced −50°F Charpy toughness directly addresses the low-temperature brittle fracture risk in FCM applications\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eCold climate structural steel:\u003c\/strong\u003e Buildings, bridges, and infrastructure in Alaska, Canada, and northern US states where service temperatures below −20°F require E7018-1 rather than standard E7018 to prevent brittle fracture in seismically or impact-loaded connections\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePressure vessels and piping with sub-zero impact requirements:\u003c\/strong\u003e ASME Section VIII pressure vessels with Charpy impact test requirements at −50°F and below — the -1 designation specifies the appropriate minimum impact energy at these temperatures\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eSeismic applications (AWS D1.8):\u003c\/strong\u003e AWS D1.8 Seismic Structural Welding Code often specifies E7018-1 or equivalent for moment connections and other high-ductility-demand joints in seismic regions\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eRoot pass on high-toughness structural steel:\u003c\/strong\u003e For base metals such as A709 Grade 70W, A588, or A992 in fracture-critical or impact-loaded service, the 3\/32 in 7018-1 provides the optimal root pass with required toughness at the smallest practical electrode diameter\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow to Use Excalibur 7018-1 MR 3\/32 in (Amperage, Polarity \u0026amp; Position)\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eAmperage for 3\/32 in:\u003c\/strong\u003e 55–90 A on DC+. Same range as Excalibur 7018 XMR 3\/32 in. For root passes in bridge or fracture-critical applications, 65–75 A is typical. For vertical-up, 55–65 A. For flat and horizontal fill, 80–90 A.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePolarity:\u003c\/strong\u003e DC+ (DCEP) only for fracture-critical applications. AC is technically permitted per E7018-1 designation but should not be used for bridge or FCM welding — DC+ ensures best hydrogen control and mechanical properties.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eStrict arc length discipline:\u003c\/strong\u003e The H4 designation requires a very short arc — no more than 1× rod diameter (about 3\/32 in). On fracture-critical work, arc length discipline is a process control requirement, not just a technique preference. Any increase in arc length increases diffusible hydrogen and reduces the fracture toughness of the deposit.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eMinimum interpass temperature for cold weather:\u003c\/strong\u003e For E7018-1 applications in cold climates, preheat is often specified — particularly for ASTM A709 bridge steels. Follow the applicable code preheat table. Minimum interpass temperature maintains preheat through the weld sequence.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eRod oven and storage:\u003c\/strong\u003e For bridge and FCM welding, all electrodes must be from sealed containers or holding ovens — in compliance with AWS D1.5 and D1.1 requirements for H4 electrodes. The MR (moisture-resistant) coating provides a safety margin, but code-compliant storage is not negotiable on fracture-critical applications.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eStorage \u0026amp; Handling\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003eStore in sealed original packaging at ambient temperature before opening\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eOnce opened, store in a holding oven at 250–300°F (121–149°C) — required for all code structural applications\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eMoisture-resistant (MR) coating extends out-of-oven exposure limits vs. standard E7018-1 without MR designation\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eRedry at 500–800°F (260–427°C) for 1–2 hours if moisture exposure is suspected\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eLabel and segregate E7018-1 from standard E7018 — incorrect electrode use on fracture-critical work is a serious nonconformance\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Base Metals \u0026amp; Joint Types\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eStructural steels for fracture-critical service:\u003c\/strong\u003e A709 Grades 36, 50, 50W, 70W; A36; A572; A588 weathering steel (bridge applications); A992 (wide flange shapes)\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePressure vessel steels requiring sub-zero impact testing:\u003c\/strong\u003e A516 with low-temperature impact requirements; A537 Class 1; A633\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eJoint types:\u003c\/strong\u003e Root and fill passes in CJP groove welds on fracture-critical bridge members; all position fillet and groove welds per AWS D1.1 and D1.5 with H4 electrode qualification\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions — Lincoln Excalibur 7018-1 MR 3\/32\u003c\/h2\u003e\u003cp\u003eWhat is E7018-1 welding rod?\u003c\/p\u003e\u003cp\u003eE7018-1 is an AWS A5.1\/A5.1M classification specifying 70 ksi minimum tensile strength, iron powder\/low-hydrogen coating, all-position capability, AND enhanced notch toughness — minimum 20 ft·lbf Charpy at −50°F. The \"-1\" suffix distinguishes this from standard E7018 (which meets 20 ft·lbf only at −20°F). Lincoln Excalibur 7018-1 MR adds moisture-resistant (MR) coating to this specification for field and bridge welding applications.\u003c\/p\u003e\u003cp\u003eWhat is the difference between E7018 and E7018-1?\u003c\/p\u003e\u003cp\u003eBoth E7018 and E7018-1 produce 70 ksi minimum tensile strength and use low-hydrogen iron powder coatings. The single critical difference: E7018-1 is required to provide 20 ft·lbf Charpy V-notch impact at −50°F; standard E7018 meets this requirement only at −20°F. For bridge fracture-critical members (AWS D1.5), cold climate structures, and applications specifying sub-zero toughness, E7018-1 is the correct selection. For standard structural carbon steel work not requiring sub-zero toughness, either E7018 or E7018-1 is acceptable.\u003c\/p\u003e\u003cp\u003eWhen is E7018-1 required vs E7018?\u003c\/p\u003e\u003cp\u003eE7018-1 is required when: (1) AWS D1.5 bridge welding code applies and fracture-critical member classification is involved; (2) the WPS or engineering specification explicitly designates E7018-1; (3) the service temperature requires −50°F notch toughness. It is also used when AWS D1.8 seismic code specifies E7018-1 or equivalent. For standard structural steel work per AWS D1.1 without special toughness requirements, E7018 is acceptable.\u003c\/p\u003e\u003cp\u003eWhat is the amperage for 3\/32 inch E7018-1?\u003c\/p\u003e\u003cp\u003eFor 3\/32 in (2.4 mm) E7018-1 MR, the typical amperage range is 55–90 A. Use 55–65 A for overhead and vertical positions; 65–75 A for general all-position work; 80–90 A for flat or horizontal fill passes on structural steel. This is the same range as 3\/32 in E7018 and E7018 XMR — diameter determines the amperage range, not the -1 toughness designation.\u003c\/p\u003e\u003cp\u003eCan E7018-1 MR be used on AWS D1.1 general structural work?\u003c\/p\u003e\u003cp\u003eYes — E7018-1 is an acceptable substitute for E7018 on all AWS D1.1 structural work. The enhanced toughness of -1 designation exceeds the D1.1 minimum requirements. There is no penalty for using E7018-1 on applications that only require E7018 — the higher toughness is simply overspecified but not harmful. Many fabricators standardize on E7018-1 to simplify electrode inventory.\u003c\/p\u003e\u003cp\u003eDoes the 3\/32 diameter affect the -1 toughness performance?\u003c\/p\u003e\u003cp\u003eNo — electrode diameter does not affect the AWS A5.1 mechanical property classification, including Charpy toughness. A 3\/32 in E7018-1 H4R meets the same −50°F Charpy requirement as a 1\/8 in, 5\/32 in, or 3\/16 in E7018-1. Diameter only affects the operating current range, deposition rate, and accessibility in joint configurations.\u003c\/p\u003e\u003cp\u003eIs Lincoln 7018-1 MR approved for bridge welding?\u003c\/p\u003e\u003cp\u003eLincoln Excalibur 7018-1 MR meets AWS A5.1\/A5.1M E7018-1 H4R classification requirements, which qualifies it for use in AWS D1.5 bridge welding applications where E7018-1 H4 electrodes are specified. For specific project applications, confirm that the electrode is qualified under the project's welding procedure specification (WPS) and that the welder is qualified per AWS D1.5 requirements.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrowse all stick electrodes:\u003c\/strong\u003e \u003ca href=\"\/collections\/stick-welding-electrodes-rods\"\u003eStick Welding Electrodes \u0026amp; Rods\u003c\/a\u003e — compare with \u003ca href=\"\/products\/lincoln-excalibur-7018-xmr-3-32-x-14-in-smaw-welding-rod\"\u003eExcalibur 7018 XMR 3\/32\u003c\/a\u003e for standard E7018 H4R performance at the same diameter, or \u003ca href=\"\/products\/lincoln-excalibur-7018-mr-stick-smaw-welding-rod\"\u003eExcalibur 7018 MR 1\/8 in\u003c\/a\u003e for standard structural work at the most common SMAW diameter.\u003c\/p\u003e\u003ch2\u003eOrdering Lincoln Excalibur 7018-1 MR from WeldingMart\u003c\/h2\u003e\u003cp\u003eLincoln Excalibur 7018-1 MR welding rods ship from WeldingMart — this product is in stock and available to add to your cart. Place your order online and in-stock items ship same day. Create a WeldingMart account to track order status, manage your product history, and reorder Lincoln Excalibur electrodes quickly for production and project needs. The 7018-1 MR meets the -60°F impact requirements for cold-weather structural applications — confirm this product is the correct grade for your application before adding to cart. For volume orders or project procurement of this Lincoln Electric product, contact WeldingMart to confirm current stock levels and delivery lead times.\u003c\/p\u003e\u003ch2\u003eTechnical Reference \u0026amp; Welding Standards\u003c\/h2\u003e\u003cp\u003eWhen selecting stick electrodes, welders should reference the relevant welding standard and process documentation. Key technical considerations include time, read, email, 5 32, 3 32, improve, 1 8, need. Always consult the electrode manufacturer's data sheet and applicable AWS, ASME, or structural welding codes for your specific application. WeldingMart provides technical resources to support your electrode selection and welding process qualification.\u003c\/p\u003e\u003ch2\u003eTechnical Reference \u0026amp; Welding Standards\u003c\/h2\u003e\u003cp\u003eWhen selecting stick electrodes, welders should reference the relevant welding standard and process documentation. Key technical considerations include time, read, email, 5 32, 3 32, improve, 1 8, need. Always consult the electrode manufacturer's data sheet and applicable AWS, ASME, or structural welding codes for your specific application. WeldingMart provides technical resources to support your electrode selection and welding process qualification.\u003c\/p\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Lincoln Excalibur 7018-1 MR\u003c\/h2\u003e\n  \u003cp\u003eLincoln Excalibur 7018-1 MR is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1\/8 in (3.2 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/8 in to 3\/8 in (3.2–9.5 mm)\u003c\/td\u003e\n\u003ctd\u003e75–130 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5\/32 in (4.0 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/16 in to 1\/2 in (4.8–12.7 mm)\u003c\/td\u003e\n\u003ctd\u003e110–175 A\u003c\/td\u003e\n\u003ctd\u003eFlat\/horizontal preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Lincoln Excalibur 7018-1 MR in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Lincoln Excalibur 7018-1 MR include: electrode, e7018 1, e7018 1 8, stick electrode, welding, weld metal, low hydrogen, metals, customers, review, great, welding rod. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Lincoln Excalibur 7018-1 MR\u003c\/h2\u003e\n  \u003cp\u003eLincoln Excalibur 7018-1 MR is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1\/8 in (3.2 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/8 in to 3\/8 in (3.2–9.5 mm)\u003c\/td\u003e\n\u003ctd\u003e75–130 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5\/32 in (4.0 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/16 in to 1\/2 in (4.8–12.7 mm)\u003c\/td\u003e\n\u003ctd\u003e110–175 A\u003c\/td\u003e\n\u003ctd\u003eFlat\/horizontal preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Lincoln Excalibur 7018-1 MR in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Lincoln Excalibur 7018-1 MR include: e7018 1 8, electrode, e7018 1, stick electrode, weld metal, low hydrogen, metals, customers, great, iron powder type, materials, value. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Lincoln Excalibur 7018-1 MR\u003c\/h2\u003e\n  \u003cp\u003eLincoln Excalibur 7018-1 MR is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1\/8 in (3.2 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/8 in to 3\/8 in (3.2–9.5 mm)\u003c\/td\u003e\n\u003ctd\u003e75–130 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5\/32 in (4.0 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/16 in to 1\/2 in (4.8–12.7 mm)\u003c\/td\u003e\n\u003ctd\u003e110–175 A\u003c\/td\u003e\n\u003ctd\u003eFlat\/horizontal preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Lincoln Excalibur 7018-1 MR in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Lincoln Excalibur 7018-1 MR include: e7018 1 8, e7018 1, stick electrode, weld metal, low hydrogen, metals, job, money, trailers, free, ideal, means. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"Lincoln Electric","offers":[{"title":"3\/32 in, 8 lb Easy Open Can (3-Pack)","offer_id":43638092562583,"sku":"ED033179","price":156.96,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 10 lb Easy Open Can (3-Pack)","offer_id":43638115008663,"sku":"ED032592","price":180.25,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 50 lb Easy Open Can (ED028702)","offer_id":43638060875927,"sku":"ED028702","price":265.47,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 50 lb Easy Open Can (ED034309)","offer_id":43638123102359,"sku":"ED034309","price":304.67,"currency_code":"USD","in_stock":true},{"title":"5\/32 in, 50 lb Easy Open Can","offer_id":43638062907543,"sku":"ED028704","price":265.47,"currency_code":"USD","in_stock":true},{"title":"3\/16 in, 50 lb Easy Open Can","offer_id":43638064349335,"sku":"ED028706","price":269.94,"currency_code":"USD","in_stock":true},{"title":"7\/32 in, 50 lb Easy Open Can","offer_id":47647591268503,"sku":"ED038369","price":0.0,"currency_code":"USD","in_stock":true},{"title":"1\/4 in, 50 lb Easy Open Can","offer_id":47647591301271,"sku":"ED038370","price":253.8,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 10 lb Easy Open Can (3-Pack)","offer_id":43638114812055,"sku":"ED032591","price":180.25,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 50 lb Easy Open Can (ED028700)","offer_id":43638060187799,"sku":"ED028700","price":270.69,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 50 lb Easy Open Can (ED034308)","offer_id":43638122152087,"sku":"ED034308","price":322.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7140\/4695\/files\/lincoln-ed033179-excalibur-7018-1-mr-stick-smaw-welding-rod-332-12-in-3-8-lb-easy-open-cans-lincoln-electric.jpg?v=1765594746"},{"product_id":"lincoln-excalibur-7018-xmr-3-32-x-14-in-smaw-welding-rod","title":"Lincoln Excalibur 7018 XMR 3\/32 x 14 in SMAW Welding Rod","description":"\u003ch2\u003eLincoln Excalibur 7018 XMR — What Is E7018 XMR?\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eLincoln Excalibur 7018 XMR\u003c\/strong\u003e (3\/32 x 14 in) is an \u003cstrong\u003eAWS A5.1\/A5.1M E7018 H4R\u003c\/strong\u003e iron powder\/low-hydrogen SMAW electrode with Lincoln Electric's XMR (Extra Moisture Resistant) coating — the highest-performance moisture-resistant coating in the Excalibur 7018 family. The XMR designation indicates an enhanced moisture-resistant coating beyond the standard MR (Moisture Resistant) designation, providing the most extended out-of-oven exposure time allowed while still meeting H4 hydrogen performance (≤4 mL\/100g diffusible hydrogen). The 3\/32 in (2.4 mm) diameter is the smallest commonly stocked Excalibur 7018 diameter, designed for root pass welding, thin-plate applications, restricted-access joints, and vertical and overhead position work where smaller rod diameter provides better operator control. This combination of 3\/32 diameter, H4R performance, and XMR moisture resistance makes this the most demanding field conditions electrode in the Excalibur 7018 size range.\u003c\/p\u003e\u003ch2\u003eAWS Classification \u0026amp; Specifications\u003c\/h2\u003e\u003ctable style=\"min-width: 50px\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"min-width: 25px\"\u003e\n\u003ccol style=\"min-width: 25px\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS classification\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS A5.1\/A5.1M E7018 H4R\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eLincoln designation\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eExcalibur 7018 XMR (Extra Moisture Resistant)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eCoating type\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eIron powder \/ low-hydrogen (extra moisture-resistant)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eRod diameter\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e3\/32 in (2.4 mm)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eRod length\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e14 in (356 mm)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003ePolarity\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eDC+ (DCEP) preferred; AC acceptable\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eWelding positions\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAll positions: 1G, 2G, 3G, 4G\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMin tensile strength\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e70,000 psi (483 MPa)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMin yield strength\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e58,000 psi (400 MPa)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eElongation\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e22% minimum\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMax diffusible hydrogen\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e≤4 mL\/100g (H4 designation)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMoisture resistance\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eR designation + XMR enhanced moisture resistance\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eTypical current range\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e3\/32 in: 55–90 A\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eManufacturer\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eLincoln Electric\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eStandards compliance\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS A5.1\/A5.1M E7018 H4R\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBest Applications for Lincoln Excalibur 7018 XMR 3\/32 in\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eRoot pass welding on structural steel:\u003c\/strong\u003e The 3\/32 in diameter provides precise control in tight root openings and restricted-access joints where 1\/8 in is too large. Ideal for root passes in CJP groove welds on structural steel connections.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eThin-plate structural welding (3\/16 – 3\/8 in):\u003c\/strong\u003e On thinner steel sections where 1\/8 in E7018 would cause burn-through or excessive heat input, 3\/32 in provides the needed current reduction while maintaining low-hydrogen performance\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eVertical and overhead code welding:\u003c\/strong\u003e Smaller diameter improves operator control in vertical-up and overhead positions — easier to manage the smaller weld pool while maintaining H4R hydrogen performance for code structural applications\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eField welding with extended rod exposure:\u003c\/strong\u003e The XMR coating provides the most moisture-resistant performance in the Excalibur 7018 family — maximum out-of-oven exposure time for field environments where electrode storage is challenging\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eStructural repairs in confined spaces:\u003c\/strong\u003e Smaller diameter and 14 in length provide improved access in confined welds where standard 1\/8 in × 18 in rods are impractical\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eSeismic and fracture-critical welds:\u003c\/strong\u003e H4R hydrogen control combined with E7018 structural performance meets the most demanding fracture-critical and seismic application requirements in AWS D1.1 and AWS D1.8\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow to Use Excalibur 7018 XMR 3\/32 in (Amperage, Polarity \u0026amp; Position)\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eAmperage for 3\/32 in:\u003c\/strong\u003e 55–90 A is the operating range. Start at 65–75 A for all-position work on 3\/16 – 1\/4 in plate. Increase to 80–90 A for flat and horizontal on thicker sections. Reduce to 55–65 A for overhead or thin plate. 3\/32 in requires significantly lower amperage than 1\/8 in — confirm settings before striking the arc.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePolarity:\u003c\/strong\u003e DC+ (DCEP) preferred for maximum penetration and optimal H4 hydrogen performance. AC is acceptable per E7018 designation. For structural code applications, use DC+.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eShort arc length:\u003c\/strong\u003e Critical for low-hydrogen performance. Keep arc length at 1× rod diameter (approximately 3\/32 in). The smaller diameter makes arc length control easier to develop than with 1\/8 in electrodes.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eXMR out-of-oven advantage:\u003c\/strong\u003e The XMR coating allows extended out-of-oven time beyond standard MR designation — consult the Lincoln Electric product data sheet for the specific extended exposure limits. Even XMR electrodes benefit from holding oven storage on code work.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003e3\/32 in vertical-up technique:\u003c\/strong\u003e Z-weave or C-weave at reduced amperage (55–65 A). The smaller puddle of 3\/32 in is easier to control on vertical than 1\/8 in, making this a good choice for welders developing vertical-up technique with E7018.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eRoot pass technique:\u003c\/strong\u003e For open-root groove welds, run 3\/32 in at 65–75 A with a tight arc and keyhole technique. The smaller diameter allows the electrode to fit into the root gap and establish fusion on both root faces before filling with larger passes.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eStorage \u0026amp; Handling\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eXMR advantage:\u003c\/strong\u003e Extended moisture-resistant coating allows significantly longer out-of-oven exposure than standard E7018 or even standard MR designation — the best option for challenging field environments\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eStore in sealed original packaging at ambient temperature before opening\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eOnce opened, store in a holding oven at 250–300°F (121–149°C) for all code-critical applications\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eFor redrying: 500–800°F (260–427°C) for 1–2 hours per Lincoln Electric recommendations\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eStore separately from non-7018 electrodes to prevent mixing\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Base Metals \u0026amp; Joint Types\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eBase metals:\u003c\/strong\u003e ASTM A36, A572 (Grade 50, 60), A516, A106 pipe, A53 pipe, and other mild-to-low-alloy structural steels per AWS D1.1 prequalified base metals\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eJoint types:\u003c\/strong\u003e Root passes and fill passes in CJP groove welds, fillet welds, and restricted-access joints where 3\/32 in diameter provides better access than 1\/8 in\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eFracture-critical and seismic:\u003c\/strong\u003e H4R classification meets the most stringent hydrogen control requirements for AWS D1.1 fracture-critical work and AWS D1.8 seismic provisions\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions — Lincoln Excalibur 7018 XMR 3\/32\u003c\/h2\u003e\u003cp\u003eWhat is E7018 XMR welding rod?\u003c\/p\u003e\u003cp\u003eLincoln Excalibur 7018 XMR is an E7018 H4R low-hydrogen SMAW electrode with an extra moisture-resistant (XMR) coating — the most moisture-resistant in the Excalibur 7018 family. XMR allows extended out-of-oven time in humid or challenging field environments while maintaining ≤4 mL\/100g diffusible hydrogen for code structural applications.\u003c\/p\u003e\u003cp\u003eWhat is the difference between E7018 XMR and E7018 MR?\u003c\/p\u003e\u003cp\u003eBoth XMR and MR provide moisture-resistant coatings that allow extended out-of-oven time compared to standard E7018. XMR (Extra Moisture Resistant) provides a higher level of moisture resistance and longer maximum out-of-oven exposure than standard MR. For applications in very humid, rainy, or exposed field conditions, XMR is the better choice to maintain H4 hydrogen performance over extended exposure periods.\u003c\/p\u003e\u003cp\u003eWhat amperage for 3\/32 inch 7018 electrodes?\u003c\/p\u003e\u003cp\u003eFor 3\/32 in (2.4 mm) E7018 XMR, the typical amperage range is 55–90 A. Use 55–65 A for overhead and vertical, 65–75 A for general all-position work, and 80–90 A for flat and horizontal on heavier sections. Compared to 1\/8 in E7018 (90–150 A range), the 3\/32 in diameter requires significantly lower amperage — incorrect (too high) amperage will cause excessive penetration and burn-through on thin material.\u003c\/p\u003e\u003cp\u003eIs 3\/32 E7018 good for root passes?\u003c\/p\u003e\u003cp\u003eYes — 3\/32 in E7018 is commonly used for root passes in structural CJP groove welds where the root opening is too tight for 1\/8 in diameter. The smaller diameter fits into the root gap and provides precise control of keyhole formation and root face fusion. The XMR moisture-resistant coating ensures that the root pass achieves H4 hydrogen performance even after extended time out of the holding oven on field applications.\u003c\/p\u003e\u003cp\u003eCan Lincoln 7018 XMR be used without an oven on job sites?\u003c\/p\u003e\u003cp\u003eThe XMR coating provides significantly extended out-of-oven exposure compared to standard E7018 — making it more practical for field job sites where electrode ovens are inconvenient. However, for code-critical structural work (AWS D1.1, ASME), even XMR electrodes must be stored per the applicable code requirements. Consult the Lincoln Electric product data sheet for specific time-temperature exposure limits for the XMR coating.\u003c\/p\u003e\u003cp\u003eWhat is the smallest diameter Excalibur 7018 available?\u003c\/p\u003e\u003cp\u003eLincoln Excalibur 7018 is available in 3\/32 in (2.4 mm) as the smallest standard diameter — this 3\/32 x 14 in XMR product. Larger diameters in the Excalibur 7018 family include 1\/8, 5\/32, 3\/16, and 7\/32 in for progressively thicker material and higher deposition applications.\u003c\/p\u003e\u003cp\u003eDoes E7018 XMR have the same mechanical properties as standard E7018?\u003c\/p\u003e\u003cp\u003eYes — E7018 XMR is classified as E7018 H4R and meets all AWS A5.1 mechanical property requirements: 70,000 psi minimum tensile, 58,000 psi minimum yield, 22% elongation, and 20 ft·lbf Charpy impact at −20°F. The XMR designation refers to the coating's moisture resistance, not a change in mechanical properties.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrowse all stick electrodes:\u003c\/strong\u003e \u003ca href=\"\/collections\/stick-welding-electrodes-rods\"\u003eStick Welding Electrodes \u0026amp; Rods\u003c\/a\u003e — compare with \u003ca href=\"\/products\/lincoln-excalibur-7018-mr-stick-smaw-welding-rod\"\u003eExcalibur 7018 MR\u003c\/a\u003e for standard moisture-resistant 7018 performance, or \u003ca href=\"\/products\/lincoln-excalibur-7018-1-mr-3-32-x-14-in-smaw-welding-rod\"\u003eExcalibur 7018-1 MR 3\/32\u003c\/a\u003e for enhanced notch toughness at this same diameter.\u003c\/p\u003e\u003ch2\u003eOrdering Lincoln Excalibur 7018 XMR from WeldingMart\u003c\/h2\u003e\u003cp\u003eThis Lincoln Electric product ships from WeldingMart — add Lincoln Excalibur 7018 XMR to your cart to place your order. The Excalibur XMR is in stock in the 3\/32 in diameter for AWS CWI-qualifying test welds and structural production welding. Create a WeldingMart account to manage your order history and enable fast reorder of this product for ongoing projects. In-stock 7018 XMR orders ship same day. Select your preferred package size from the variant picker before adding to cart. Questions about this product's suitability for certification testing? Our welding specialists can advise before you order.\u003c\/p\u003e\u003ch2\u003eTechnical Reference \u0026amp; Welding Standards\u003c\/h2\u003e\u003cp\u003eWhen selecting stick electrodes, welders should reference the relevant welding standard and process documentation. Key technical considerations include read, contact. Always consult the electrode manufacturer's data sheet and applicable AWS, ASME, or structural welding codes for your specific application. WeldingMart provides technical resources to support your electrode selection and welding process qualification.\u003c\/p\u003e\u003ch2\u003eTechnical Reference \u0026amp; Welding Standards\u003c\/h2\u003e\u003cp\u003eWhen selecting stick electrodes, welders should reference the relevant welding standard and process documentation. Key technical considerations include read, contact. Always consult the electrode manufacturer's data sheet and applicable AWS, ASME, or structural welding codes for your specific application. WeldingMart provides technical resources to support your electrode selection and welding process qualification.\u003c\/p\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Lincoln Excalibur 7018 XMR\u003c\/h2\u003e\n  \u003cp\u003eLincoln Excalibur 7018 XMR is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Lincoln Excalibur 7018 XMR in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Lincoln Excalibur 7018 XMR include: stick, 50 lb, lb easy open, e7018 h4r, mild steel, smooth arc, master carton, e7018 h4r requirement, 0.035 max, 0.30 max, min, moisture pickup. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Lincoln Excalibur 7018 XMR\u003c\/h2\u003e\n  \u003cp\u003eLincoln Excalibur 7018 XMR is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Lincoln Excalibur 7018 XMR in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Lincoln Excalibur 7018 XMR include: stick, 50 lb, lb easy open, mild steel, smooth arc, master carton, e7018 h4r requirement, 0.035 max, 0.30 max, typical result, clear puddle, low hydrogen. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Lincoln Excalibur 7018 XMR\u003c\/h2\u003e\n  \u003cp\u003eLincoln Excalibur 7018 XMR is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Lincoln Excalibur 7018 XMR in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Lincoln Excalibur 7018 XMR include: stick, 50 lb, lb easy open, 60 less moisture pickup, improved coating integrity, mn ni cr mo, typical result as welded, ft lbs, 350 mm, charpy v notch, extreme bendability, ft lbs 30 c. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"Lincoln Electric","offers":[{"title":"1\/8 in, 10 lb Easy Open Can","offer_id":43639136944279,"sku":"ED037426","price":188.25,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 50 lb Easy Open Can","offer_id":43639163846807,"sku":"ED037423","price":251.97,"currency_code":"USD","in_stock":true},{"title":"5\/32 in, 10 lb Easy Open Can (3-Pack)","offer_id":43639137239191,"sku":"ED037427","price":188.25,"currency_code":"USD","in_stock":true},{"title":"5\/32 in, 50 lb Easy Open Can","offer_id":43639163617431,"sku":"ED037424","price":251.97,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 10 lb Easy Open Can","offer_id":43639136780439,"sku":"ED037425","price":188.25,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 50 lb Easy Open Can","offer_id":43639163748503,"sku":"ED037422","price":13618.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7140\/4695\/files\/lincoln-ed037426-excalibur-7018-xmr-stick-smaw-welding-rod-18x14-in-3-10-lb-easy-open-can-lincoln-electric-1.jpg?v=1760720031"},{"product_id":"lincoln-ironarc-7018-mr-x-14-smaw-welding-rod","title":"Lincoln E7018 H4R (IronArc 7018 MR x 14 SMAW Welding Rod)","description":"\u003cp\u003eLincoln IronArc 7018 MR is a moisture-resistant E7018 H4R welding rod designed for structural, pressure vessel, and general fabrication welding where low hydrogen content (≤ 4 mL\/100g) and extended exposure tolerance are needed. With a 72,000 psi minimum tensile, DCEP or AC operation, and Lincoln's MR (moisture-resistant) flux coating, IronArc 7018 MR bridges the gap between standard E7018 and premium Excalibur 7018 MR — delivering proven H4R performance with an economical package suited to high-volume structural welding shops and contractors working in field conditions.\u003c\/p\u003e\n\n\u003ch2\u003eWhat Is the Lincoln IronArc 7018 MR E7018 H4R Welding Rod?\u003c\/h2\u003e\n\u003cp\u003eIronArc 7018 MR is Lincoln Electric's value-positioned E7018 moisture-resistant SMAW electrode. The AWS classification E7018 H4R decodes as: \"E\" = electrode; \"70\" = 72,000 psi minimum tensile; \"1\" = all-position; \"8\" = low-hydrogen iron-powder covering, AC or DCEP; \"H4R\" = diffusible hydrogen ≤ 4 mL\/100g weld metal, with moisture-resistant coating. The H4R designation is critical for structural welding under AWS D1.1, ASME Section IX, and various bridge codes that mandate low-hydrogen filler for thick-section, high-restraint, and hydrogen-cracking-sensitive applications. IronArc 7018 MR occupies a specific market position: it provides the same essential H4R credentials as Lincoln's premium Excalibur 7018 MR but at a more accessible price point, making it a popular choice for fabrication shops and structural contractors who weld high volumes of E7018 under AWS D1.1 and need reliable hydrogen control without the premium Excalibur pricing on every pound of electrode consumed.\u003c\/p\u003e\n\u003cp\u003eThe \"MR\" moisture-resistant coating means the flux binder resists humidity absorption at a higher rate than standard E7018, extending the permitted out-of-oven exposure time. This is particularly valuable in field welding, bridge erection, and coastal or tropical construction environments where maintaining oven access between every rod change is impractical.\u003c\/p\u003e\n\n\u003ch2\u003eAWS Classification \u0026amp; Mechanical Specs — E7018 H4R Welding Rod\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAWS Classification\u003c\/td\u003e\n\u003ctd\u003eE7018\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eH-Designation\u003c\/td\u003e\n\u003ctd\u003eH4R (≤ 4 mL\/100g diffusible H2, moisture-resistant)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength (min.)\u003c\/td\u003e\n\u003ctd\u003e72,000 psi (496 MPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eYield Strength (min.)\u003c\/td\u003e\n\u003ctd\u003e60,000 psi (414 MPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eElongation (min.)\u003c\/td\u003e\n\u003ctd\u003e22%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCharpy CVN (−20°F)\u003c\/td\u003e\n\u003ctd\u003e20 ft·lbf minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlux Type\u003c\/td\u003e\n\u003ctd\u003eLow-hydrogen iron-powder, moisture-resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003eAC, DCEP\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePositions\u003c\/td\u003e\n\u003ctd\u003eAll (F, H, V-up, OH)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDiameters\u003c\/td\u003e\n\u003ctd\u003e3\/32, 1\/8, 5\/32, 3\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe 20 ft·lbf Charpy CVN at −20 °F is a critical distinction between E7018 and non-low-hydrogen electrodes (E7014, E6013). This CVN classification makes E7018 H4R the required filler metal for bridges, offshore structures, seismic zones, and other applications governed by AASHTO, AWS D1.5, or lateral load design requirements.\u003c\/p\u003e\n\n\u003ch2\u003eBest Applications for IronArc 7018 MR E7018 Welding Rod\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAWS D1.1 structural steel fabrication\u003c\/strong\u003e — buildings, industrial structures, stadiums, and industrial equipment requiring low-hydrogen filler and CVN toughness.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBridge girder and component fabrication\u003c\/strong\u003e — AWS D1.5 bridge welding code applications requiring verified H4R low-hydrogen filler.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure vessel fabrication per ASME Section VIII\u003c\/strong\u003e — standard carbon-steel vessels where E7018 is the code-specified filler class.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eField welding on construction sites\u003c\/strong\u003e — the MR coating provides extended viability outside the oven for field welders who cannot maintain continuous oven access.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-restraint joints on thick plate\u003c\/strong\u003e — the H4R designation is mandatory for joints with high stiffness, high preheat, and thick cross-section where hydrogen-induced cracking risk is elevated.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeismic-zone construction\u003c\/strong\u003e — IBC and AISC seismic provisions require low-hydrogen, notch-tough weld metal in seismic force-resisting system connections.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use IronArc 7018 MR — Amperage, Polarity \u0026amp; Position\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003ePosition Notes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/32 in\u003c\/td\u003e\n\u003ctd\u003e65–100 A\u003c\/td\u003e\n\u003ctd\u003eRoot passes, sheet, tack\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/8 in\u003c\/td\u003e\n\u003ctd\u003e90–140 A\u003c\/td\u003e\n\u003ctd\u003eGeneral structural fabrication\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5\/32 in\u003c\/td\u003e\n\u003ctd\u003e120–175 A\u003c\/td\u003e\n\u003ctd\u003eFill passes, large fillets\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/16 in\u003c\/td\u003e\n\u003ctd\u003e160–225 A\u003c\/td\u003e\n\u003ctd\u003eHeavy fill\/cap, flat\/horizontal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003ePolarity:\u003c\/strong\u003e DCEP preferred; AC acceptable on most machines with minimum 70 V OCV. DCEP provides better arc stability and slightly better penetration than AC.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eArc length:\u003c\/strong\u003e Very short — 1\/2× to 1× electrode core diameter. E7018 is particularly sensitive to long arc length: a long arc introduces nitrogen, causes porosity, and spatter. The characteristic short arc and \"drag\" technique of E7018 is fundamental to its low-hydrogen performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInterpass temperature:\u003c\/strong\u003e Maintain preheat (typically 150–300 °F for A36–A572 Grade 50 per AWS D1.1) and do not allow interpass to exceed 450–500 °F for most structural applications. Verify per the applicable code and WPS.\u003c\/p\u003e\n\n\u003ch2\u003eStorage \u0026amp; Handling for E7018 H4R MR Electrodes\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSealed containers:\u003c\/strong\u003e Lincoln's hermetically sealed canisters maintain H4R condition indefinitely at room temperature in a dry area.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHolding oven (mandatory once opened):\u003c\/strong\u003e 250–300 °F. MR coating extends the permitted out-of-oven exposure time per AWS D1.1 Table 4.7. Consult Lincoln's MR electrode guide for specific exposure time tables.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRedrying:\u003c\/strong\u003e 700–800 °F for 1 hour if moisture exposure is suspected. Track cumulative exposure time carefully.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNever use non-oven-stored E7018 on H4R-required welds:\u003c\/strong\u003e Moisture-absorbed E7018 can exceed 16 mL\/100g diffusible hydrogen — the primary cause of delayed hydrogen cracking in structural welds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Base Metals \u0026amp; Joint Types for E7018\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eASTM A36, A572 Grades 42–65 structural steel\u003c\/li\u003e\n  \u003cli\u003eASTM A709 Grades 36, 50, 50W bridge plate\u003c\/li\u003e\n  \u003cli\u003eASTM A514, A517 quenched-and-tempered plate (verify preheat per code)\u003c\/li\u003e\n  \u003cli\u003eASTM A516 Grades 55–70 pressure vessel plate\u003c\/li\u003e\n  \u003cli\u003eAPI 2W Grade 50 offshore platform plate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAll groove and fillet joint types in all positions. IronArc 7018 MR is one of the most versatile structural electrodes available — the combination of H4R, all-position capability, CVN toughness, and MR coating covers virtually every structural welding requirement except the highest-specification Demand Critical welds (use Excalibur 7018 MR for those).\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions — Lincoln IronArc 7018 MR E7018 Welding Rod\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between IronArc 7018 MR and Excalibur 7018 MR?\u003c\/strong\u003e\u003cbr\u003e\nBoth are E7018 H4R moisture-resistant electrodes. Excalibur 7018 MR is Lincoln's premium tier with tighter chemistry control, enhanced arc characteristics, and tested performance for Demand Critical weld applications per AWS D1.8 seismic provisions. IronArc 7018 MR is the value tier — same H4R and MR credentials at a more economical price, well-suited for high-volume standard structural fabrication where Demand Critical specification is not required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is diffusible hydrogen and why does H4R matter?\u003c\/strong\u003e\u003cbr\u003e\nDiffusible hydrogen (measured in mL\/100g of weld metal) is hydrogen that can migrate through the weld metal and HAZ after welding, concentrating at stress risers and creating hydrogen-assisted cold cracking (HACC). H4R limits diffusible hydrogen to ≤ 4 mL\/100g — the lowest standard classification under AWS. HACC can occur hours or days after welding on thick or restrained joints in high-strength steels, making H4R specification mandatory for many structural, bridge, and pressure vessel applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long can I leave IronArc 7018 MR out of the oven on a job site?\u003c\/strong\u003e\u003cbr\u003e\nThe MR designation extends the permitted atmospheric exposure time relative to standard E7018. AWS D1.1 Table 4.7 defines maximum exposure times for low-hydrogen electrodes at various relative humidity levels. For H4R MR electrodes, exposure limits are typically 9 hours in environments up to 50 % RH. Consult Lincoln's published MR electrode exposure data for site-specific guidance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I run IronArc 7018 MR on an AC buzz-box?\u003c\/strong\u003e\u003cbr\u003e\nYes, but only on AC machines with at least 70 V open-circuit voltage. At lower OCV, E7018 arc starts become inconsistent. Most modern AC transformers (Lincoln AC-225, Tombstone-style 225 A machines) meet this requirement. If your machine produces arc instability or frequent sticking with E7018, check OCV first.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is E7018 required for all structural welding?\u003c\/strong\u003e\u003cbr\u003e\nNot always. For applications on mild steel (A36) with low restraint and no notch-toughness code requirement, E6013 or E7014 may be acceptable. E7018 is required when: (1) the weld code specifies Low Hydrogen (AWS D1.1 Table 4.5 Category F); (2) the joint is highly restrained, thick, or on high-yield steel (A572-65, A514); (3) the application requires CVN notch toughness. Verify with the applicable code and project specification before substituting filler metal classes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What OCV (open circuit voltage) is needed to run E7018?\u003c\/strong\u003e\u003cbr\u003e\n70 V minimum OCV is the general industry standard for reliable E7018 arc starts. At lower OCV (e.g., 50–60 V), arc starts are erratic and the electrode tends to stick on contact. Engine-driven welders and modern inverters typically exceed 70 V OCV; verify your machine's OCV before running E7018 on an unfamiliar power source.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can IronArc 7018 MR be used for root passes on pipe?\u003c\/strong\u003e\u003cbr\u003e\nE7018 can be used for pipe root passes with a tight-fit, back-gouged, or ceramic-backed root configuration. For open-root pipe groove welds (no backing), the fast-freeze is less reliable than E6010\/E6011. Most pipe welding procedures use E6010 for the root and hot pass, then fill and cap with E7018. Consult the applicable WPS for root pass electrode specification.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\"@type\": \"Question\", \"name\": \"What is the difference between IronArc 7018 MR and Excalibur 7018 MR?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Both are E7018 H4R MR electrodes. Excalibur is the premium tier with tighter chemistry for Demand Critical applications. IronArc is the value tier with the same H4R and MR credentials for standard high-volume structural fabrication.\"}},\n    {\"@type\": \"Question\", \"name\": \"What is diffusible hydrogen and why does H4R matter?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Diffusible hydrogen migrates through weld metal and HAZ, causing hydrogen-assisted cold cracking hours or days after welding. H4R limits it to 4 mL\/100g — the lowest AWS classification, mandatory for thick, restrained, or high-strength steel applications.\"}},\n    {\"@type\": \"Question\", \"name\": \"How long can I leave IronArc 7018 MR out of the oven?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"AWS D1.1 Table 4.7 permits up to 9 hours exposure for H4R MR electrodes in environments up to 50% RH. Consult Lincoln's MR electrode exposure tables for site-specific guidance.\"}},\n    {\"@type\": \"Question\", \"name\": \"Can I run IronArc 7018 MR on an AC buzz-box?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, on AC machines with at least 70V OCV. Below this, arc starts become inconsistent. Most modern 225A transformers meet this requirement.\"}},\n    {\"@type\": \"Question\", \"name\": \"What OCV is needed for E7018?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"70V minimum OCV for reliable arc starts. Below 60V, E7018 tends to stick. Verify your machine's OCV before use.\"}},\n    {\"@type\": \"Question\", \"name\": \"Is E7018 required for all structural welding?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Only when code specifies Low Hydrogen (AWS D1.1 Table 4.5 Category F), or when the joint is thick\/restrained\/high-yield, or when CVN toughness is required. For simple mild steel low-restraint work, E7014 or E6013 may be acceptable — verify with the applicable code.\"}},\n    {\"@type\": \"Question\", \"name\": \"Can IronArc 7018 MR be used for pipe root passes?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"E7018 can be used for root passes on ceramic-backed or back-gouged pipe configurations. For open-root pipe, most WPS call for E6010 root and hot pass, then E7018 fill and cap.\"}}\n  ]\n}\n\u003c\/script\u003e\n\u003ch2\u003eE7018 H4R Low-Hydrogen Welding Rod Technical Notes\u003c\/h2\u003e\n\u003cp\u003eThe E7018 H4R classification represents the most stringent hydrogen control available for standard-strength structural carbon steel welding. Diffusible hydrogen testing per AWS A4.3 measures the total hydrogen released from a weld metal sample immersed in mercury at 45°C for 72 hours — H4 means this total does not exceed 4 mL per 100g of weld metal deposited. For comparison, standard E7018 (non-H designated) can exceed 8 mL\/100g, and a moisture-absorbed E7018 can reach 16 mL\/100g or higher. Hydrogen-induced cold cracking (HICC), also called underbead cracking or delayed cracking, occurs when three conditions coincide: susceptible microstructure (hardened HAZ martensite), sufficient hydrogen, and applied or residual tensile stress. Removing any one of these three factors prevents HICC — preheat reduces the HAZ hardness by slowing cooling, H4R limits hydrogen, and proper joint design minimizes residual stress concentration. For structural engineers and welding engineers specifying filler metal for thick, high-restraint, or higher-strength-steel joints, H4R designation provides the hydrogen control margin needed to prevent HICC even when preheat or interpass control is less than perfect. Lincoln IronArc 7018 MR combines H4R with moisture-resistant (MR) flux to extend the practical field exposure window, making it the most field-practical way to maintain H4R compliance on construction sites and in maintenance environments.\u003c\/p\u003e","brand":"Lincoln Electric","offers":[{"title":"5\/32 in, 50 lb Easy Open Can","offer_id":44222936514711,"sku":"ED040002","price":233.08,"currency_code":"USD","in_stock":true},{"title":"3\/16 in, 10 lb Easy Open Can","offer_id":44222936547479,"sku":"ED040003","price":145.25,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 10 lb Easy Open Can","offer_id":44222935957655,"sku":"ED040000-1","price":154.8,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 50 lb Easy Open Can","offer_id":44222935990423,"sku":"ED040000","price":241.63,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 10 lb Easy Open Can","offer_id":44222936481943,"sku":"ED040001-1","price":151.56,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 50 lb Easy Open Can","offer_id":44222936023191,"sku":"ED040001","price":233.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7140\/4695\/files\/lincoln-ed040002-ironarc-7018-mr-stick-smaw-welding-rod-532x14-in-50-lb-easy-open-can-lincoln-electric-1.jpg?v=1746614844"},{"product_id":"lincoln-excalibur-7018-mr-stick-smaw-welding-rod","title":"Lincoln Excalibur 7018 MR Stick SMAW Welding Rod","description":"\u003c!-- PER-161 v1 parent body — auto-rendered from grade card lincoln-excalibur-7018-mr-stick-smaw-welding-rod on 2026-05-20 --\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eLincoln Excalibur 7018 MR Low-Hydrogen Stick Electrode\u003c\/strong\u003e is a low-hydrogen iron-powder basic-coated moisture-resistant SMAW electrode classified to \u003cstrong\u003eAWS A5.1\/A5.1M E7018 H4R\u003c\/strong\u003e. It is engineered for code-quality fabrication on mild and low-alloy steels where diffusible hydrogen control, excellent puddle visibility, and superior out-of-position operability are required — making it a benchmark choice for power generation, petrochemical, and structural work. The H4R designation, combined with Lincoln Electric's proprietary moisture-resistant coating technology, delivers up to 60% less moisture pickup versus competitive E7018 electrodes, reducing the risk of hydrogen-induced cracking in demanding field and shop environments.\u003c\/p\u003e\n\n\u003cdiv class=\"per161-tldr\"\u003e\n  \u003ch2\u003eKey takeaways\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClassification:\u003c\/strong\u003e AWS A5.1\/A5.1M E7018 H4R\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBest for:\u003c\/strong\u003e All-position low-hydrogen welding on mild steel and low-alloy steel in structural, pressure vessel, and process piping applications\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePolarity:\u003c\/strong\u003e DC+ or AC\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePositions:\u003c\/strong\u003e All positions except vertical down\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAvailable diameters:\u003c\/strong\u003e 3\/32 in, 1\/8 in, 5\/32 in, 3\/16 in, 7\/32 in, 1\/4 in\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAWS Classification: \u003cstrong\u003eAWS A5.1\/A5.1M E7018 H4R\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eCoating: Low-hydrogen iron-powder basic (lime-fluoride) coating with moisture-resistant H4R designation; formulated to resist moisture pickup up to 60% better than competitive E7018 electrodes\u003c\/li\u003e\n  \u003cli\u003ePolarity: DC reverse polarity (DCEP\/electrode positive) preferred for optimum arc stability; AC is also acceptable on machines with adequate open-circuit voltage; Lincoln publishes slightly higher AC amperage ranges than DC+ ranges\u003c\/li\u003e\n  \u003cli\u003eWelding positions: All positions including vertical-up and overhead, except vertical down; larger diameters (3\/16 in and above) recommended for flat and horizontal positions only\u003c\/li\u003e\n  \u003cli\u003eHydrogen designator: H4R (≤4 mL H₂\/100 g deposited weld metal; moisture-resistant coating — 60% less moisture pickup vs. competition)\u003c\/li\u003e\n  \u003cli\u003eTypical amperage: 70–110 A DC+ \/ 80–120 A AC (3\/32 in); 90–160 A DC+ \/ 100–160 A AC (1\/8 in); 130–210 A DC+ \/ 140–210 A AC (5\/32 in); 180–300 A DC+ \/ 200–300 A AC (3\/16 in); 250–330 A DC+ \/ 270–370 A AC (7\/32 in); 300–400 A DC+ \/ 325–420 A AC (1\/4 in)\u003c\/li\u003e\n  \u003cli\u003eCharpy V-notch impact: 27 J (20 ft·lbf) min @ -29 °C (-20 °F) per AWS E7018 H4R; typical 121–332 J (89–246 ft·lbf) @ -29 °C (-20 °F)\u003c\/li\u003e\n  \u003cli\u003eAvailable diameters: 3\/32 in, 1\/8 in, 5\/32 in, 3\/16 in, 7\/32 in, 1\/4 in\u003c\/li\u003e\n  \u003cli\u003ePack sizes: 8 lb Easy Open Can (3-Pack), 10 lb Easy Open Can (3-Pack), 50 lb Easy Open Can, 50 lb Easy Open Can (Buy America)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAvailable variants \u0026amp; part numbers\u003c\/h2\u003e\n\u003ctable class=\"per161-variants\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003cth\u003ePack size\u003c\/th\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/32 in\u003c\/td\u003e\n\u003ctd\u003e8 lb Easy Open Can (3-Pack)\u003c\/td\u003e\n\u003ctd\u003eED033940\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/32 in\u003c\/td\u003e\n\u003ctd\u003e10 lb Easy Open Can (3-Pack)\u003c\/td\u003e\n\u003ctd\u003eED032588\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/32 in\u003c\/td\u003e\n\u003ctd\u003e50 lb Easy Open Can\u003c\/td\u003e\n\u003ctd\u003eED028280\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/32 in\u003c\/td\u003e\n\u003ctd\u003e50 lb Easy Open Can (Buy America)\u003c\/td\u003e\n\u003ctd\u003eED033868\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/8 in\u003c\/td\u003e\n\u003ctd\u003e10 lb Easy Open Can (3-Pack)\u003c\/td\u003e\n\u003ctd\u003eED032589\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/8 in\u003c\/td\u003e\n\u003ctd\u003e10 lb Easy Open Can (3-Pack)\u003c\/td\u003e\n\u003ctd\u003eED033838\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/8 in\u003c\/td\u003e\n\u003ctd\u003e50 lb Easy Open Can (Buy America)\u003c\/td\u003e\n\u003ctd\u003eED033869\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/8 in\u003c\/td\u003e\n\u003ctd\u003e50 lb Easy Open Can\u003c\/td\u003e\n\u003ctd\u003eED028281\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5\/32 in\u003c\/td\u003e\n\u003ctd\u003e10 lb Easy Open Can (3-Pack)\u003c\/td\u003e\n\u003ctd\u003eED033839\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5\/32 in\u003c\/td\u003e\n\u003ctd\u003e10 lb Easy Open Can (3-Pack)\u003c\/td\u003e\n\u003ctd\u003eED032590\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5\/32 in\u003c\/td\u003e\n\u003ctd\u003e50 lb Easy Open Can\u003c\/td\u003e\n\u003ctd\u003eED028282\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5\/32 in\u003c\/td\u003e\n\u003ctd\u003e50 lb Easy Open Can\u003c\/td\u003e\n\u003ctd\u003eED033870\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/16 in\u003c\/td\u003e\n\u003ctd\u003e50 lb Easy Open Can\u003c\/td\u003e\n\u003ctd\u003eED028283\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/16 in\u003c\/td\u003e\n\u003ctd\u003e50 lb Easy Open Can (Buy America)\u003c\/td\u003e\n\u003ctd\u003eED033871\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e7\/32 in\u003c\/td\u003e\n\u003ctd\u003e50 lb Easy Open Can\u003c\/td\u003e\n\u003ctd\u003eED034307\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e7\/32 in\u003c\/td\u003e\n\u003ctd\u003e50 lb Easy Open Can\u003c\/td\u003e\n\u003ctd\u003eED038367\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/4 in\u003c\/td\u003e\n\u003ctd\u003e50 lb Easy Open Can\u003c\/td\u003e\n\u003ctd\u003eED038368\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eExcalibur 7018 MR is purpose-built for code-driven all-position welding on mild and low-alloy steels:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStructural steel fabrication and erection (AWS D1.1 code work)\u003c\/li\u003e\n  \u003cli\u003ePressure vessel fabrication and repair (ASME Section VIII)\u003c\/li\u003e\n  \u003cli\u003ePower generation equipment and boiler components\u003c\/li\u003e\n  \u003cli\u003ePressure piping and pipefitting (ASME B31.1 \/ B31.3)\u003c\/li\u003e\n  \u003cli\u003ePetrochemical plant construction and maintenance\u003c\/li\u003e\n  \u003cli\u003eShipbuilding and marine structural assemblies\u003c\/li\u003e\n  \u003cli\u003eGeneral mild steel fabrication requiring low-hydrogen deposits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to use Excalibur 7018 MR\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eStore unopened cans in a clean, dry area; once opened, hold rods in a heated rod oven at 250–300°F until use to maintain H4R diffusible hydrogen levels.\u003c\/li\u003e\n  \u003cli\u003eIf electrodes have been exposed to atmosphere for more than a few hours after opening, recondition by baking at 500–550°F for 1 hour before use.\u003c\/li\u003e\n  \u003cli\u003eSet the welding machine to DC+ (electrode positive) for best arc stability and weld quality; AC is acceptable on smaller machines — use the AC amperage range in that case.\u003c\/li\u003e\n  \u003cli\u003eSelect amperage within the published range for the diameter in use: 70–110 A DC+ for 3\/32 in, 90–160 A DC+ for 1\/8 in, 130–210 A DC+ for 5\/32 in; for out-of-position work, dial to the lower one-third of the range.\u003c\/li\u003e\n  \u003cli\u003eStrike the arc with a brief tap-and-drag; maintain a short arc length (approximately equal to the electrode diameter) to minimize hydrogen pickup and spatter.\u003c\/li\u003e\n  \u003cli\u003eUse stringer beads or narrow weaves; limit weave width to 2–3× electrode diameter — the Excalibur 7018 MR's square coating burn-off and self-peeling slag facilitate clean multi-pass runs.\u003c\/li\u003e\n  \u003cli\u003eAllow each pass to cool to interpass temperature (≤300°F unless the WPS specifies otherwise); remove slag completely between passes; return unused rods to the heated oven after welding.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eExcalibur 7018 MR vs related grades\u003c\/h2\u003e\n\u003cp\u003eCompared to standard E6013 (rutile, mild steel), E7018 delivers approximately 10 ksi higher tensile strength and far lower diffusible hydrogen — making it mandatory for crack-sensitive, code-governed work where E6013 is inadequate. Compared to E7018-1 H4R (the tougher sibling with Charpy requirement at -46°C vs. E7018's -29°C), the standard 7018 MR is the more economical choice for applications that do not require assured toughness at temperatures below -20°F. Stepping up to E8018-C3 or E9018-M adds low-alloy or Ni-Mo alloying for higher tensile strength and better low-temperature toughness on alloy steels, but neither is needed for mild steel work where Excalibur 7018 MR provides the optimal balance of performance, operability, and value.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cdetails class=\"per161-faq-item\"\u003e\n  \u003csummary\u003eWhat is the AWS classification of Lincoln Excalibur 7018 MR?\u003c\/summary\u003e\n  \u003cp\u003eThe Excalibur 7018 MR is classified AWS A5.1\/A5.1M E7018 H4R — a mild steel, low-hydrogen iron-powder electrode with a moisture-resistant coating that limits diffusible hydrogen to ≤4 mL per 100 g of deposited weld metal.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"per161-faq-item\"\u003e\n  \u003csummary\u003eCan Excalibur 7018 MR run on AC or DC?\u003c\/summary\u003e\n  \u003cp\u003eYes — it runs on both DC+ (electrode positive) and AC. DC+ is preferred for the smoothest arc and best mechanical properties. On AC, use the slightly higher amperage ranges published by Lincoln (e.g., 80–120 A AC vs. 70–110 A DC+ for 3\/32 in diameter).\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"per161-faq-item\"\u003e\n  \u003csummary\u003eWhat does the MR (Moisture Resistant) designation mean?\u003c\/summary\u003e\n  \u003cp\u003eMR indicates the coating is specially formulated to resist moisture reabsorption from the atmosphere. Lincoln Electric's Excalibur 7018 MR picks up 60% less moisture than competitive E7018 electrodes, reducing the risk of hydrogen-induced cold cracking — especially important in humid or outdoor environments.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"per161-faq-item\"\u003e\n  \u003csummary\u003eDo I need to bake or recondition these electrodes before use?\u003c\/summary\u003e\n  \u003cp\u003eUnopened cans do not require baking if stored properly in a dry location. Once opened, hold rods in a heated rod oven at 250–300°F. If rods have been out of the oven for an extended period, recondition at 500–550°F for 1 hour to restore H4R hydrogen levels before use.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"per161-faq-item\"\u003e\n  \u003csummary\u003eWhat positions can I weld in with Excalibur 7018 MR?\u003c\/summary\u003e\n  \u003cp\u003eAll positions except vertical down — including flat, horizontal, vertical-up, and overhead. For out-of-position work, set amperage to the lower portion of the published range for the diameter. Note that the larger diameters (3\/16 in and above) are best suited for flat and horizontal positions only.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cp\u003eShop \u003cstrong\u003eLincoln Excalibur 7018 MR Low-Hydrogen Stick Electrode\u003c\/strong\u003e at WeldingMart.com — competitive pricing, fast shipping, and the largest in-stock selection of Lincoln Electric SMAW consumables. Backed by Lincoln Electric's Q2 Lot® quality system — with actual deposit chemistry and mechanical test results available online — and the Excalibur brand's decades of proven performance as the industry's benchmark low-hydrogen stick electrode for structural, pressure vessel, and process piping applications.\u003c\/p\u003e\n\n\u003csection class=\"per161-internal-links\" aria-label=\"Related stick electrodes\"\u003e\n  \u003ch3\u003eRelated stick electrodes\u003c\/h3\u003e\n  \u003cul\u003e\n        \u003cli\u003e\u003ca href=\"\/collections\/stick-welding-electrodes-rods\"\u003estick welding electrodes\u003c\/a\u003e\u003c\/li\u003e\n        \u003cli\u003e\u003ca href=\"\/products\/harris-e7018-mild-steel-stick-smaw-welding-rod\"\u003eHarris E7018\u003c\/a\u003e\u003c\/li\u003e\n        \u003cli\u003e\u003ca href=\"\/products\/lincoln-7018-ac-rsp-stick-smaw-welding-rod\"\u003e7018-AC RSP\u003c\/a\u003e\u003c\/li\u003e\n        \u003cli\u003e\u003ca href=\"\/products\/lincoln-7018-ac-stick-smaw-welding-rod\"\u003eLincoln 7018-AC\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"Lincoln Electric","offers":[{"title":"3\/32 in, 8 lb Easy Open Can (3-Pack)","offer_id":43638098362519,"sku":"ED033940","price":198.72,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 10 lb Easy Open Can (3-Pack)","offer_id":43638111043735,"sku":"ED032588","price":167.4,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 50 lb Easy Open Can","offer_id":43638082961559,"sku":"ED028280","price":244.8,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 50 lb Easy Open Can (Buy America)","offer_id":43638112485527,"sku":"ED033868","price":308.68,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 10 lb Easy Open Can (3-Pack) (ED032589)","offer_id":43638112354455,"sku":"ED032589","price":167.4,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 10 lb Easy Open Can (3-Pack) (ED033838)","offer_id":43638098428055,"sku":"ED033838","price":229.75,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 50 lb Easy Open Can (Buy America)","offer_id":43638112649367,"sku":"ED033869","price":287.96,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 50 lb Easy Open Can","offer_id":47611296383127,"sku":"ED028281","price":236.4,"currency_code":"USD","in_stock":true},{"title":"5\/32 in, 10 lb Easy Open Can (3-Pack) (ED033839)","offer_id":43638099017879,"sku":"ED033839","price":242.08,"currency_code":"USD","in_stock":true},{"title":"5\/32 in, 10 lb Easy Open Can (3-Pack) (ED032590)","offer_id":43638113599639,"sku":"ED032590","price":167.4,"currency_code":"USD","in_stock":true},{"title":"5\/32 in, 50 lb Easy Open Can (ED028282)","offer_id":43638084599959,"sku":"ED028282","price":236.4,"currency_code":"USD","in_stock":true},{"title":"5\/32 in, 50 lb Easy Open Can (ED033870)","offer_id":43638114713751,"sku":"ED033870","price":287.39,"currency_code":"USD","in_stock":true},{"title":"3\/16 in, 50 lb Easy Open Can (ED028283)","offer_id":43638085681303,"sku":"ED028283","price":240.0,"currency_code":"USD","in_stock":true},{"title":"3\/16 in, 50 lb Easy Open Can (Buy America)","offer_id":43638115434647,"sku":"ED033871","price":329.54,"currency_code":"USD","in_stock":true},{"title":"7\/32 in, 50 lb Easy Open Can (ED034307)","offer_id":43638120972439,"sku":"ED034307","price":230.96,"currency_code":"USD","in_stock":true},{"title":"7\/32 in, 50 lb Easy Open Can (ED038367)","offer_id":47647590875287,"sku":"ED038367","price":0.0,"currency_code":"USD","in_stock":true},{"title":"1\/4 in, 50 lb Easy Open Can","offer_id":47647590908055,"sku":"ED038368","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7140\/4695\/files\/lincoln-ed033940-excalibur-7018-mr-n-stick-smaw-welding-rod-332-14-in-3-8-lb-easy-open-cans-lincoln-electric.jpg?v=1765594687"},{"product_id":"lincoln-excalibur-7018-a1-mr-stick-smaw-welding-rod","title":"Lincoln Excalibur 7018-A1 MR Stick SMAW Welding Rod","description":"\u003ch2\u003eLincoln Excalibur 7018-A1 MR — What Is E7018-A1?\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eLincoln Excalibur 7018-A1 MR\u003c\/strong\u003e is an \u003cstrong\u003eAWS A5.5\/A5.5M E7018-A1 H4R\u003c\/strong\u003e iron powder\/low-hydrogen SMAW electrode for welding carbon-molybdenum (C-Mo) low-alloy steels on \u003cstrong\u003eDC+ (DCEP)\u003c\/strong\u003e in all positions. The \"-A1\" classification designates a 0.5% molybdenum alloyed deposit — the key distinction from standard E7018 (AWS A5.1). The 0.5 Mo addition shifts Excalibur 7018-A1 from an AWS A5.1 carbon steel electrode into the AWS A5.5 low-alloy category, providing enhanced tensile strength, creep resistance, and elevated-temperature properties needed for P-No. 3 Group 1 materials (1\/2 Mo steel, ASTM A204), pressure vessel steels (A302 Grade A), and applications that operate at temperatures above the carbon steel service range. The H4R designation confirms hydrogen control to ≤4 mL\/100g and moisture-resistant coating for extended out-of-oven storage in field environments.\u003c\/p\u003e\u003ch2\u003eAWS Classification \u0026amp; Specifications\u003c\/h2\u003e\u003ctable style=\"min-width: 50px\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"min-width: 25px\"\u003e\n\u003ccol style=\"min-width: 25px\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS classification\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS A5.5\/A5.5M E7018-A1 H4R\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eCoating type\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eIron powder \/ low-hydrogen (moisture-resistant)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003ePolarity\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eDC+ (DCEP) — do not use AC\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eWelding positions\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAll positions: 1G, 2G, 3G, 4G\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eWeld metal Mo content\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e~0.5% Mo (nominal)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMin tensile strength\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e70,000 psi (483 MPa)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMin yield strength\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e57,000 psi (393 MPa)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eElongation\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e22% minimum\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMax diffusible hydrogen\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e≤4 mL\/100g (H4 designation)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMoisture resistance\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eR designation — extended out-of-oven exposure allowed per AWS D1.1\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eCharpy V-notch impact\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003ePer AWS A5.5 requirements\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eTypical current range\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e3\/32 in: 70–100 A | 1\/8 in: 90–150 A | 5\/32 in: 120–200 A\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eManufacturer\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eLincoln Electric\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eStandards compliance\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS A5.5\/A5.5M E7018-A1 H4R\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBest Applications for Lincoln Excalibur 7018-A1 MR\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eP-No. 3 Group 1 pressure vessels (1\/2 Mo steel):\u003c\/strong\u003e ASTM A204 Grades A, B, C — the primary low-alloy 0.5 Mo material requiring E7018-A1 matched filler for ASME Section I and Section VIII vessels\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eCarbon-molybdenum piping:\u003c\/strong\u003e ASTM A335 Grade P1 (0.5 Mo chrome-moly piping) in power generation, refining, and petrochemical facilities where operating temperatures exceed mild steel service range\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eElevated temperature service (up to ~900°F \/ 480°C):\u003c\/strong\u003e Applications where creep resistance and 0.5 Mo alloying are required to maintain weld joint integrity at operating temperatures above the E7018 (carbon steel) service ceiling\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePower generation low-alloy steel:\u003c\/strong\u003e Turbine casings, valve bodies, and pipe connections fabricated from A204, A302 Grade A, or P1 chrome-moly materials\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eH4R field welding where extended rod storage is needed:\u003c\/strong\u003e The moisture-resistant coating allows significantly longer out-of-oven exposure than standard E7018 — ideal for remote field sites and pipeline field welding where holding oven availability is limited\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow to Use Excalibur 7018-A1 MR (Amperage, Polarity \u0026amp; Position)\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePolarity:\u003c\/strong\u003e DC+ (DCEP) ONLY — the A5.5 low-alloy designation does not permit AC operation. Use a DC welding machine. Do not attempt to run E7018-A1 on AC.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eAmperage:\u003c\/strong\u003e 1\/8 in: 90–150 A. Same range as Excalibur 7018 MR. Use mid-range (100–130 A) for multi-pass structural work; higher end for flat and horizontal fill passes on thick material; lower end for vertical and overhead.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePreheat and interpass temperature:\u003c\/strong\u003e Follow the applicable code preheat table for P-No. 3 material — typically 200–300°F (93–149°C) preheat for A204 and similar 0.5 Mo steels depending on section thickness and carbon equivalent. Interpass temperature control is critical for maintaining mechanical properties in low-alloy deposits.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePost-weld heat treatment (PWHT):\u003c\/strong\u003e Per ASME Section VIII and applicable code, P-No. 3 materials typically require PWHT at 1100–1200°F (593–649°C) to reduce residual stress and improve toughness in the low-alloy weld deposit. Follow the applicable code and WPS for hold time and cooling rate.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eArc length:\u003c\/strong\u003e Short arc length critical for H4 hydrogen control — same discipline as E7018 MR. Tight arc minimizes atmospheric hydrogen pickup.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eOut-of-oven time:\u003c\/strong\u003e H4R designation allows extended out-of-oven exposure (9 hours at temperatures up to 80°F per AWS D1.1 Table 4.5) compared to standard E7018. For code work, confirm the specific rod exposure limits in the applicable standard.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eStorage \u0026amp; Handling\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eR (moisture-resistant) coating advantage:\u003c\/strong\u003e The MR designation provides substantially longer out-of-oven exposure compared to standard E7018 — per AWS D1.1, H4R electrodes are allowed significantly extended time-out limits before redrying is required\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eStore in sealed original packaging at ambient temperature before opening\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eOnce opened, store in a holding oven at 250–300°F (121–149°C) for code-critical applications; moisture-resistant coating allows longer out-of-oven exposure for general work\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eFor redrying: 500–800°F (260–427°C) for 1–2 hours; do not exceed manufacturer's redry temperature\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eNever mix with standard E7018 — the A5.5 low-alloy classification is critical for matching base metal requirements\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Base Metals \u0026amp; Joint Types\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eMatched 0.5 Mo steels:\u003c\/strong\u003e ASTM A204 Gr. A\/B\/C (Mo-alloyed pressure vessel plate), A302 Gr. A (Mn-Mo plate), A335 P1 piping, A234 WP1 fittings\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eAlso used for:\u003c\/strong\u003e Joining P-No. 3 to P-No. 1 (carbon steel) when transitional weld metal provides sufficient tensile and toughness properties for the design\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eNot for Cr-Mo steels:\u003c\/strong\u003e E7018-A1 is 0.5% Mo only, no chromium — for 1¼ Cr-½ Mo steel (P22), use E8018-B2; for 2¼ Cr-1 Mo (P22), use E9018-B3; for Grade 91 (9Cr-1Mo-V), use the appropriate Chromet electrode\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eJoint types:\u003c\/strong\u003e All groove configurations and fillet welds per ASME Section IX and AWS D1.1 with appropriate WPS documentation for low-alloy materials\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions — Lincoln Excalibur 7018-A1 MR\u003c\/h2\u003e\u003cp\u003eWhat is E7018-A1 welding rod used for?\u003c\/p\u003e\u003cp\u003eLincoln Excalibur 7018-A1 MR is used for welding 0.5% molybdenum low-alloy steels — primarily ASTM A204 pressure vessel plate, A335 P1 piping, and P-No. 3 Group 1 materials in power generation, refining, and petrochemical applications where elevated-temperature creep resistance is required. The 0.5 Mo deposit exceeds plain carbon steel electrode capability for service above ~800°F.\u003c\/p\u003e\u003cp\u003eWhat is the difference between E7018 and E7018-A1?\u003c\/p\u003e\u003cp\u003eE7018 (AWS A5.1) is a carbon steel electrode with no alloying elements. E7018-A1 (AWS A5.5) contains 0.5% molybdenum in the weld deposit — this molybdenum addition improves elevated-temperature tensile strength, creep resistance, and matches the composition of 0.5 Mo low-alloy base metals. The practical difference: use E7018 for carbon steel A36\/A572 structural work; use E7018-A1 for ASTM A204 and P-No. 3 pressure vessel and piping work that requires matched filler metal.\u003c\/p\u003e\u003cp\u003eDoes E7018-A1 require preheat?\u003c\/p\u003e\u003cp\u003eFor most ASTM A204 and A335 P1 0.5 Mo steel applications, preheat in the range of 200–300°F (93–149°C) is required depending on section thickness and carbon equivalent. Follow the applicable code (ASME Section VIII, ASME B31.1\/B31.3, AWS D1.1) and the qualified WPS for your specific base material and joint design. Preheat for low-alloy steels is more demanding than for carbon steel due to increased hardenability.\u003c\/p\u003e\u003cp\u003eWhat is H4R on an electrode?\u003c\/p\u003e\u003cp\u003eH4 means the electrode is certified to ≤4 mL diffusible hydrogen per 100g of weld metal — the most demanding hydrogen control level in AWS A5.1\/A5.5. R (moisture-resistant) means the electrode coating has been tested to maintain its low-hydrogen performance after extended atmospheric exposure (per AWS A4.3). H4R electrodes provide maximum hydrogen control combined with moisture resistance — critical for fracture-critical structural, pressure vessel, and pipeline applications.\u003c\/p\u003e\u003cp\u003eCan E7018-A1 be used instead of E7018 on carbon steel?\u003c\/p\u003e\u003cp\u003eYes — E7018-A1 can be used on carbon steel and will produce a weld with adequate mechanical properties for most A36\/A572 structural applications. The 0.5 Mo deposit on carbon steel does not cause problems. However, E7018-A1 (A5.5) costs more than E7018 (A5.1) and the Mo alloying provides no benefit on carbon steel — use standard E7018 for carbon steel work and reserve E7018-A1 for applications where 0.5 Mo filler is required by the WPS or code.\u003c\/p\u003e\u003cp\u003eDoes E7018-A1 require PWHT?\u003c\/p\u003e\u003cp\u003eFor code work on P-No. 3 materials (A204, P1 pipe), PWHT is typically required per ASME Section VIII and ASME B31.1\/B31.3 at 1100–1200°F (593–649°C). For AWS D1.1 structural applications, PWHT requirements depend on base material, thickness, and the WPS. Always follow the applicable code and qualified WPS — PWHT on low-alloy steel is not optional for most code applications.\u003c\/p\u003e\u003cp\u003eWhat Excalibur electrode should I use for 2¼ Cr-1 Mo steel (P22)?\u003c\/p\u003e\u003cp\u003eFor P22 (ASTM A387 Grade 22, A335 P22 — 2¼ Cr-1 Mo steel), use Lincoln Excalibur 9018-B3 MR (AWS E9018-B3 H4R), not E7018-A1. The B3 designation provides the matched 2.25% Cr and 1% Mo composition required for P22 base metals. E7018-A1's 0.5 Mo without chromium is not appropriate for P22 applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrowse all stick electrodes:\u003c\/strong\u003e \u003ca href=\"\/collections\/stick-welding-electrodes-rods\"\u003eStick Welding Electrodes \u0026amp; Rods\u003c\/a\u003e — see also \u003ca href=\"\/products\/lincoln-excalibur-7018-mr-stick-smaw-welding-rod\"\u003eExcalibur 7018 MR\u003c\/a\u003e for standard carbon steel structural work, or \u003ca href=\"\/products\/lincoln-excalibur-9018-b3-mr-stick-smaw-welding-rod\"\u003eExcalibur 9018-B3 MR\u003c\/a\u003e for 2¼ Cr-1 Mo (P22) alloy steel applications.\u003c\/p\u003e\u003ch2\u003eOrdering Lincoln Excalibur 7018-A1 MR from WeldingMart\u003c\/h2\u003e\u003cp\u003eThis Lincoln Electric product ships from WeldingMart — add Lincoln Excalibur 7018-A1 MR to your cart and place your order. We stock the Excalibur 7018-A1 MR for power generation, boiler, and pressure vessel fabricators who depend on this electrode for PWHT applications. Create a WeldingMart account to manage your order history and reorder this product quickly for ongoing project needs. In-stock Excalibur 7018-A1 orders ship same day. Select your preferred diameter and package configuration from the variant picker before adding to cart. Questions about this product before you order? Contact our welding application specialists for technical guidance.\u003c\/p\u003e\u003ch2\u003eTechnical Reference \u0026amp; Welding Standards\u003c\/h2\u003e\u003cp\u003eWhen selecting stick electrodes, welders should reference the relevant welding standard and process documentation. Key technical considerations include tubing. Always consult the electrode manufacturer's data sheet and applicable AWS, ASME, or structural welding codes for your specific application. WeldingMart provides technical resources to support your electrode selection and welding process qualification.\u003c\/p\u003e\u003ch2\u003eTechnical Reference \u0026amp; Welding Standards\u003c\/h2\u003e\u003cp\u003eWhen selecting stick electrodes, welders should reference the relevant welding standard and process documentation. Key technical considerations include tubing. Always consult the electrode manufacturer's data sheet and applicable AWS, ASME, or structural welding codes for your specific application. WeldingMart provides technical resources to support your electrode selection and welding process qualification.\u003c\/p\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Lincoln Excalibur 7018-A1 MR\u003c\/h2\u003e\n  \u003cp\u003eLincoln Excalibur 7018-A1 MR is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1\/8 in (3.2 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/8 in to 3\/8 in (3.2–9.5 mm)\u003c\/td\u003e\n\u003ctd\u003e75–130 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5\/32 in (4.0 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/16 in to 1\/2 in (4.8–12.7 mm)\u003c\/td\u003e\n\u003ctd\u003e110–175 A\u003c\/td\u003e\n\u003ctd\u003eFlat\/horizontal preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Lincoln Excalibur 7018-A1 MR in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Lincoln Excalibur 7018-A1 MR include: e7018 a1, stick electrode, 7018 a1, rods, e7018 a1 h4r, a1 h4r, low hydrogen, low alloy, diameters, buy, welding, electrode. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Lincoln Excalibur 7018-A1 MR\u003c\/h2\u003e\n  \u003cp\u003eLincoln Excalibur 7018-A1 MR is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1\/8 in (3.2 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/8 in to 3\/8 in (3.2–9.5 mm)\u003c\/td\u003e\n\u003ctd\u003e75–130 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5\/32 in (4.0 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/16 in to 1\/2 in (4.8–12.7 mm)\u003c\/td\u003e\n\u003ctd\u003e110–175 A\u003c\/td\u003e\n\u003ctd\u003eFlat\/horizontal preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Lincoln Excalibur 7018-A1 MR in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Lincoln Excalibur 7018-A1 MR include: e7018 a1, stick electrode, 7018 a1, rods, e7018 a1 h4r, low hydrogen, low alloy, a1 h4r, buy, diameters, welding rod, ac. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Lincoln Excalibur 7018-A1 MR\u003c\/h2\u003e\n  \u003cp\u003eLincoln Excalibur 7018-A1 MR is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1\/8 in (3.2 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/8 in to 3\/8 in (3.2–9.5 mm)\u003c\/td\u003e\n\u003ctd\u003e75–130 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5\/32 in (4.0 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/16 in to 1\/2 in (4.8–12.7 mm)\u003c\/td\u003e\n\u003ctd\u003e110–175 A\u003c\/td\u003e\n\u003ctd\u003eFlat\/horizontal preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Lincoln Excalibur 7018-A1 MR in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Lincoln Excalibur 7018-A1 MR include: e7018 a1, stick electrode, 7018 a1, rods, e7018 a1 h4r, low hydrogen, low alloy, buy, welding rod, a1 h4r, pressure vessels, ideal. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"Lincoln Electric","offers":[{"title":"3\/32 in, 8 lb Easy Open Can","offer_id":43638099968151,"sku":"ED032893","price":198.36,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 25 lb Easy Open Can","offer_id":43638090039447,"sku":"ED032875","price":187.62,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 10 lb Easy Open Can","offer_id":43638089056407,"sku":"ED032873","price":240.29,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 50 lb Easy Open Can","offer_id":43638090596503,"sku":"ED032876","price":351.97,"currency_code":"USD","in_stock":true},{"title":"5\/32 in, 50 lb Easy Open Can","offer_id":43638091776151,"sku":"ED032877","price":357.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7140\/4695\/files\/lincoln-ed032893-excalibur-7018-a1-mr-stick-smaw-welding-rod-332x12-in-3-8-lb-easy-open-cans-lincoln-electric.jpg?v=1765594687"},{"product_id":"harris-e7018-mild-steel-stick-smaw-welding-rod","title":"Harris E7018 Mild Steel Stick SMAW Welding Rod","description":"\u003ch2\u003eHarris E7018 Stick Electrode — What Is E7018?\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eHarris E7018\u003c\/strong\u003e is an \u003cstrong\u003eAWS A5.1\/A5.1M E7018\u003c\/strong\u003e iron powder\/low-hydrogen SMAW electrode delivering 70 ksi minimum tensile strength on \u003cstrong\u003eDC+ (DCEP) or AC power\u003c\/strong\u003e in all welding positions. The iron-powder, low-hydrogen coating produces an exceptionally smooth, stable arc with minimal spatter, excellent bead appearance, and low diffusible hydrogen content — making E7018 the standard electrode for structural steel fabrication, pressure vessel welding, bridges, heavy equipment, and any application requiring AWS D1.1 prequalification. Harris E7018 meets all AWS A5.1 compositional and mechanical requirements and is suited for single-pass and multi-pass welding on mild and medium-carbon steel base metals. WeldingMart stocks Harris E7018 in standard 1\/8 and 5\/32 in diameters.\u003c\/p\u003e\u003ch2\u003eAWS Classification \u0026amp; Specifications\u003c\/h2\u003e\u003ctable style=\"min-width: 50px\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"min-width: 25px\"\u003e\n\u003ccol style=\"min-width: 25px\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS classification\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS A5.1\/A5.1M E7018\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eCoating type\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eIron powder \/ low-hydrogen\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003ePolarity\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eDC+ (DCEP) or AC\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eWelding positions\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAll positions: 1G, 2G, 3G, 4G (flat, horizontal, vertical, overhead)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMinimum tensile strength\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e70,000 psi (483 MPa)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMinimum yield strength\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e58,000 psi (400 MPa)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eElongation\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e22% minimum\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eMax diffusible hydrogen\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e≤16 mL\/100g (E7018 standard designation)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eCharpy V-notch impact\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e20 ft·lbf at −20°F (as-welded per AWS A5.1)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eTypical current range\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e3\/32 in: 70–100 A | 1\/8 in: 90–150 A | 5\/32 in: 120–200 A | 3\/16 in: 150–250 A\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAvailable diameters\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003e1\/8, 5\/32 in (check variant selector)\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eManufacturer\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eHarris Products Group\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eStandards compliance\u003c\/p\u003e\u003c\/th\u003e\n\u003ctd colspan=\"1\" rowspan=\"1\"\u003e\u003cp\u003eAWS A5.1\/A5.1M E7018\u003c\/p\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBest Applications for E7018\u003c\/h2\u003e\u003cp\u003eHarris E7018 is the most widely specified mild-steel SMAW electrode for structural and pressure-critical applications:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eStructural steel fabrication:\u003c\/strong\u003e AWS D1.1 prequalified for structural welding — beams, columns, connections, and seismic applications where fracture toughness and low hydrogen are required\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePressure vessels and boilers:\u003c\/strong\u003e ASME Section IX qualification and AWS D1.1 prequalification make E7018 the standard choice for pressure-retaining welds on carbon steel\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eBridge and infrastructure welding:\u003c\/strong\u003e High Charpy impact values at −20°F and low-hydrogen deposit meet bridge welding code (AWS D1.5) toughness requirements\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eHeavy equipment and machinery:\u003c\/strong\u003e Multi-pass capability, excellent penetration, and 70 ksi strength handle thick-section steel on excavators, cranes, trucks, and industrial machinery\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eFabrication shops and job sites:\u003c\/strong\u003e The all-position capability, smooth arc, and predictable deposition make E7018 the preferred electrode for experienced stick welders in shop and field environments\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eRepair and maintenance of carbon steel:\u003c\/strong\u003e Reliable results on mild, medium-carbon, and low-alloy steels for maintenance welding that requires code-quality deposits\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow to Use Harris E7018 (Amperage, Polarity \u0026amp; Position)\u003c\/h2\u003e\u003cp\u003eE7018 requires proper machine setup and technique to achieve its full structural performance:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eAmperage:\u003c\/strong\u003e Match amperage to diameter — 1\/8 in: 90–150 A, 5\/32 in: 120–200 A. Run at the high end of the range for thick plate and multi-pass fill passes; use lower amperage on thin material or root passes. Correct amperage produces a fluid, well-tied-in puddle without excessive heat input.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePolarity:\u003c\/strong\u003e Use DC+ (DCEP) for maximum penetration and optimal hydrogen control. AC is also permitted by the E7018 designation and is acceptable on machines without DC output, though DC+ is always preferred for structural applications.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eArc length:\u003c\/strong\u003e Keep arc length short — no more than 1× rod diameter. Low-hydrogen coatings generate CO₂\/CO shielding that is diluted by a long arc, allowing hydrogen pickup. A short, tight arc is critical to maintaining low diffusible hydrogen.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eTravel angle:\u003c\/strong\u003e 5–15° drag angle for flat and horizontal; slight whip or weave technique for vertical-up positions. For vertical-up, a Z-weave or triangle weave controls the fluid puddle and prevents undercut.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eInterpass temperature:\u003c\/strong\u003e For most A36\/A572 structural steel, preheat is not required below 1 in thickness. For thicker plate or higher-carbon steel, follow AWS D1.1 preheat tables. Monitor interpass temperature — keep below 550°F (290°C) maximum for most structural steel to control heat input.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eArc striking:\u003c\/strong\u003e Scratch-start on DC+; scratch-start or tap-start on AC. E7018 has a more demanding arc start than rutile electrodes — ensure the rod end is clean and free of moisture-contaminated coating fragments before striking.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eSlag removal:\u003c\/strong\u003e E7018 produces a heavy, slow-solidifying slag that provides excellent atmospheric protection during cooling. Chip and wire brush between passes. Failure to remove slag fully before the next pass causes slag inclusions.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eStorage \u0026amp; Handling of Low-Hydrogen E7018\u003c\/h2\u003e\u003cp\u003eLow-hydrogen electrode storage is critical to maintaining weld quality and meeting code requirements for diffusible hydrogen:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eSealed containers:\u003c\/strong\u003e Store unopened cans or hermetically sealed packages in a dry location at 50–120°F (10–49°C). Do not open until ready to use.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eOven storage after opening:\u003c\/strong\u003e AWS D1.1 and ASME codes require E7018 to be stored in a holding oven at 250–300°F (121–149°C) once the container is opened. Time out of the oven before use is limited — AWS D1.1 allows a maximum of 4 hours exposure for E7018 (H8) before redrying is required.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eRedrying:\u003c\/strong\u003e Exposed E7018 that has exceeded out-time limits should be redried at 500–800°F (260–427°C) for 1–2 hours before use. Do not exceed the electrode manufacturer's redry temperature. Rods must be cooled to handling temperature before use.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eQuivers and rod ovens:\u003c\/strong\u003e Use a heated electrode quiver (rod oven set to 100–150°F) at the work site to maintain dryness during a welding shift.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eNever use wet or moisture-contaminated rods:\u003c\/strong\u003e Moisture in the coating causes porosity, worm-hole defects, and elevated diffusible hydrogen — directly increasing the risk of hydrogen-assisted cracking (HAC) on restrained joints and higher-strength steels.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Base Metals \u0026amp; Joint Types\u003c\/h2\u003e\u003cp\u003eHarris E7018 is formulated for carbon and low-alloy steels and is compatible with a wide range of joint configurations:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eBase metals:\u003c\/strong\u003e ASTM A36, A572 (Grade 50, 60), A516 (Grades 55, 60, 65, 70 pressure vessel plate), A517 (with preheat), A588 weathering steel (single-pass), A106 pipe (Grades B, C), and similar mild-to-low-alloy steels with carbon equivalent under 0.45\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eJoint types:\u003c\/strong\u003e Butt joints (all groove configurations — V, double-V, J, U), fillet welds, plug welds, slot welds, and PJP\/CJP groove welds. AWS D1.1 Table 4.5 prequalifies E7018 for all common joint designs.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eDissimilar metal welding:\u003c\/strong\u003e E7018 is acceptable for joining A36 to A572, or for single-layer cladding over lower-strength steel where the higher strength of the deposit is acceptable in the application design\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eStainless steel compatibility:\u003c\/strong\u003e E7018 is a carbon-steel electrode and is NOT suitable for welding austenitic stainless steel. Use E308L, E309L, or E316L stainless stick electrodes for stainless steel applications.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions — Harris E7018\u003c\/h2\u003e\u003cp\u003eWhat is E7018 welding rod used for?\u003c\/p\u003e\u003cp\u003eHarris E7018 is used for structural steel fabrication, pressure vessel welding, heavy equipment repair, and any application requiring AWS D1.1 prequalification. The low-hydrogen, iron-powder coating provides 70 ksi minimum tensile strength, excellent Charpy impact toughness, and low diffusible hydrogen — making it the go-to electrode for code-quality stick welding on mild and low-alloy carbon steel.\u003c\/p\u003e\u003cp\u003eWhat is the difference between E7018 and E6013?\u003c\/p\u003e\u003cp\u003eE7018 provides 70 ksi minimum tensile strength vs. 60 ksi for E6013. E7018 uses an iron powder \/ low-hydrogen coating that minimizes diffusible hydrogen and is required by structural codes; E6013 uses a rutile (titania) coating that is easier to run but has higher hydrogen and is not prequalified for most structural codes. For code welding on structural steel, use E7018. For light fabrication, training, or AC-only welders, E6013 is acceptable.\u003c\/p\u003e\u003cp\u003eDo I need to store E7018 in an oven?\u003c\/p\u003e\u003cp\u003eYes. After opening, E7018 electrodes should be stored in a holding oven at 250–300°F (121–149°C). AWS D1.1 limits the maximum out-of-oven time to 4 hours for E7018 (H8) before redrying is required. On job sites, use a heated electrode quiver to maintain dryness during a welding shift. Failure to control moisture in low-hydrogen electrodes leads to hydrogen-assisted cracking in restrained joints.\u003c\/p\u003e\u003cp\u003eWhat polarity is E7018?\u003c\/p\u003e\u003cp\u003eE7018 runs on DC+ (DCEP) as the preferred polarity for maximum penetration and best mechanical properties. AC is also permitted — the \"8\" suffix in E7018 designates iron-powder low-hydrogen coating with AC or DC+ compatibility. For structural or code welding, always use DC+ when a DC machine is available.\u003c\/p\u003e\u003cp\u003eCan Harris E7018 be used for vertical welding?\u003c\/p\u003e\u003cp\u003eYes. The \"1\" in E7018 designates all-position capability — flat, horizontal, vertical, and overhead. For vertical-up welding, use a Z-weave or triangle weave technique to control the fluid weld pool. For vertical-down, E7018 is generally not used — vertical-down stick welding on structural applications requires a cellulosic electrode (E6010\/E6011) for adequate penetration.\u003c\/p\u003e\u003cp\u003eWhat is the amperage for 1\/8 inch E7018?\u003c\/p\u003e\u003cp\u003eThe typical amperage range for 1\/8 in (3.2 mm) E7018 is 90–150 A. Start at the mid-range (120 A) and adjust based on base metal thickness, joint type, and position. For 3G (vertical) or 4G (overhead), use lower amperage (90–120 A) to control the fluid puddle. For flat and horizontal fill passes on thick plate, use 130–150 A for maximum deposition.\u003c\/p\u003e\u003cp\u003eIs E7018 good for beginners?\u003c\/p\u003e\u003cp\u003eE7018 is more demanding than E6013 for beginners due to its short arc length requirement, oven storage needs, and less forgiving arc characteristics. However, many welding schools teach E7018 from the start because it is the industry standard for structural welding. With proper amperage setting and arc length discipline, E7018 produces excellent results — the investment in learning E7018 technique pays off in professional-grade structural weld quality.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBrowse all stick electrodes:\u003c\/strong\u003e \u003ca href=\"\/collections\/stick-welding-electrodes-rods\"\u003eStick Welding Electrodes \u0026amp; Rods\u003c\/a\u003e — or compare with \u003ca href=\"\/products\/lincoln-excalibur-7018-mr-stick-smaw-welding-rod\"\u003eLincoln Excalibur 7018 MR\u003c\/a\u003e for premium H4R low-hydrogen performance, or \u003ca href=\"\/products\/harris-e6013-stick-smaw-welding-rod\"\u003eHarris E6013\u003c\/a\u003e for light fabrication and training applications on AC machines.\u003c\/p\u003e\u003ch2\u003eOrdering Harris E7018 from WeldingMart\u003c\/h2\u003e\u003cp\u003eThis product is in stock and ships directly from WeldingMart's warehouse. Add the Harris E7018 welding rod to your cart and place your order online — we process orders quickly with same-day shipping on in-stock items. Create a WeldingMart account to track your order status, view your order history, and manage reorders. Our product comes in multiple package sizes; select your preferred quantity and diameter from the variant selector before adding to cart. We keep popular E7018 stock levels high to meet demand from structural fabricators, shipbuilders, and maintenance shops. Questions about this product? Contact our welding specialists before you order.\u003c\/p\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Harris E7018\u003c\/h2\u003e\n  \u003cp\u003eHarris E7018 is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1\/8 in (3.2 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/8 in to 3\/8 in (3.2–9.5 mm)\u003c\/td\u003e\n\u003ctd\u003e75–130 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5\/32 in (4.0 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/16 in to 1\/2 in (4.8–12.7 mm)\u003c\/td\u003e\n\u003ctd\u003e110–175 A\u003c\/td\u003e\n\u003ctd\u003eFlat\/horizontal preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Harris E7018 in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-purchasing\"\u003e\n  \u003ch2\u003eHow to Purchase Harris E7018 at WeldingMart\u003c\/h2\u003e\n  \u003cp\u003eWeldingMart ships Harris E7018 from our warehouse with fast processing. This product ships in the original manufacturer packaging to ensure electrode integrity during transit. Each product order ships with a manufacturer lot number for traceability. Add the correct diameter to your cart — select the product variant (1\/8 in, 3\/32 in, or 5\/32 in) before you add to cart.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHow to add to cart:\u003c\/strong\u003e Select your preferred diameter and package size, then add the product to your cart. Review your cart to confirm the correct product variant and quantity before checkout.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThis product ships:\u003c\/strong\u003e Harris E7018 ships from our Wisconsin warehouse. Standard orders ship same day when placed by our daily order cutoff. Expedited shipping is available at checkout.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStock availability:\u003c\/strong\u003e Current stock levels are shown on this product page. Add to cart to reserve your quantity — stock is not held until you complete your order.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOrder tracking:\u003c\/strong\u003e After you place your order, create an account or log in to your existing account to track order status, view order history, and manage reorders.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAccount benefits:\u003c\/strong\u003e Your WeldingMart account stores your order history and shipping preferences, making it easy to add repeat products to cart without re-entering information.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBulk orders:\u003c\/strong\u003e For large quantity orders of this product, add the desired quantity to cart and complete checkout — our system handles bulk order processing automatically. Contact us before ordering pallet quantities.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReturn policy:\u003c\/strong\u003e This product is eligible for return within 30 days if unopened and in original packaging. Contact our team before returning any product to obtain a return authorization number.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eThis product ships with tracking. Once your order ships, you will receive a shipping confirmation with tracking information. Check your account order history for the latest shipment status on all orders. If you need to add additional products to your order, add them to cart before checkout — orders cannot be modified after they ship.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Harris E7018 include: low hydrogen, stick, mechanical properties, stable, bead, excellent mechanical properties, piping, shipbuilding, ideal, size, welding positions, pressure vessels. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Harris E7018\u003c\/h2\u003e\n  \u003cp\u003eHarris E7018 is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1\/8 in (3.2 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/8 in to 3\/8 in (3.2–9.5 mm)\u003c\/td\u003e\n\u003ctd\u003e75–130 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5\/32 in (4.0 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/16 in to 1\/2 in (4.8–12.7 mm)\u003c\/td\u003e\n\u003ctd\u003e110–175 A\u003c\/td\u003e\n\u003ctd\u003eFlat\/horizontal preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Harris E7018 in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Harris E7018 include: low hydrogen, stable, bead, excellent mechanical properties, piping, shipbuilding, ideal, clean. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-diameter-guide\"\u003e\n  \u003ch2\u003eDiameter Selection Guide for Harris E7018\u003c\/h2\u003e\n  \u003cp\u003eHarris E7018 is available in multiple electrode diameters. Selecting the correct diameter for your base metal thickness is critical for weld quality and penetration depth.\u003c\/p\u003e\n  \u003ctable class=\"diameter-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eElectrode Diameter\u003c\/th\u003e\n\u003cth\u003eBase Metal Range\u003c\/th\u003e\n\u003cth\u003eAmperage Range\u003c\/th\u003e\n\u003cth\u003eBest Position\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e3\/32 in (2.4 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/32 in to 1\/4 in (2.4–6.4 mm)\u003c\/td\u003e\n\u003ctd\u003e40–80 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1\/8 in (3.2 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/8 in to 3\/8 in (3.2–9.5 mm)\u003c\/td\u003e\n\u003ctd\u003e75–130 A\u003c\/td\u003e\n\u003ctd\u003eAll positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5\/32 in (4.0 mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/16 in to 1\/2 in (4.8–12.7 mm)\u003c\/td\u003e\n\u003ctd\u003e110–175 A\u003c\/td\u003e\n\u003ctd\u003eFlat\/horizontal preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003eThe 1\/8 in (3.2 mm) diameter is the most versatile option for general fabrication on material from 3\/16 in to 3\/8 in thickness. Use 3\/32 in for sheet metal and thin sections where 1\/8 in would cause excessive heat input. Use 5\/32 in for heavier sections where higher deposition rates reduce total welding time. For most structural repair and field work, 1\/8 in is the preferred starting diameter.\u003c\/p\u003e\n  \u003cp\u003eWhen ordering Harris E7018 in 3\/32 in, 1\/8 in, or 5\/32 in, select the correct diameter variant from the product page before adding to cart. Each diameter is a separate product variant with its own SKU — confirm you have selected the right 1\/8 in, 3\/32 in, or 5\/32 in size before placing your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"pdp-technical-supplement\"\u003e\n  \u003ch2\u003eTechnical Data and Welding Process Notes\u003c\/h2\u003e\n  \u003cp\u003eAdditional technical considerations for Harris E7018 include: low hydrogen. Welders should review the product data sheet for complete welding procedure specifications. Key process parameters such as preheat requirements, interpass temperature, and post-weld heat treatment requirements vary by base metal composition and application code requirements. Consult AWS, ASME, or applicable structural welding codes for code-compliant welding procedures.\u003c\/p\u003e\n  \u003cp\u003eFor best results, store electrodes in a dry environment and use within manufacturer recommended timeframes after opening. Proper electrode storage and handling directly impacts weld quality — follow manufacturer guidance for oven temperatures and rod reconditioning procedures as applicable to this electrode classification.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"Harris","offers":[{"title":"3\/32 in · 5 lb Tube","offer_id":44258850930839,"sku":"7018505","price":28.2,"currency_code":"USD","in_stock":true},{"title":"3\/32 in · 10 lb Tube","offer_id":44258851160215,"sku":"70185010","price":54.2,"currency_code":"USD","in_stock":true},{"title":"1\/8 in · 5 lb Tube","offer_id":44258851192983,"sku":"7018605","price":27.1,"currency_code":"USD","in_stock":true},{"title":"1\/8 in · 10 lb Tube","offer_id":43638632644759,"sku":"70186010","price":49.6,"currency_code":"USD","in_stock":true},{"title":"5\/32 in · 5 lb Tube","offer_id":44258851225751,"sku":"7018705","price":27.1,"currency_code":"USD","in_stock":true},{"title":"5\/32 in · 10 lb Tube","offer_id":44258852110487,"sku":"70187010","price":49.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7140\/4695\/files\/harris-e7018-stick-smaw-welding-rod-332-5-box-7018505-harris-1.jpg?v=1753396064"},{"product_id":"lincoln-ironarc-7018-1-mr-stick-smaw-welding-rod","title":"Lincoln IronArc 7018-1 MR Stick SMAW Welding Rod","description":"\u003c!-- PER-161 Template A parent body | handle lincoln-ironarc-7018-1-mr-stick-smaw-welding-rod | bulk render --\u003e\n\u003csection class=\"parent-pdp-intro\"\u003e\n  \u003cp class=\"lead\"\u003e\u003cstrong\u003eLincoln IronArc 7018-1 MR\u003c\/strong\u003e is an AWS A5.1\/A5.1M E7018-1 SMAW stick electrode family with 70 ksi minimum tensile and DC+ or AC, all positions operation. WeldingMart stocks 4 package and diameter variants of this grade, all sharing the same AWS classification - select the diameter and package format that fits your application below.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"parent-grade-summary\"\u003e\n  \u003ch2\u003eAbout Lincoln IronArc 7018-1 MR\u003c\/h2\u003e\n  \u003cp\u003eLincoln IronArc 7018-1 MR is an AWS A5.1 E7018-1 H4R low-hydrogen iron-powder basic-coated moisture-resistant SMAW electrode with the -1 suffix designating improved low-temperature impact toughness (20 ft-lb at -50 F minimum). The IronArc product line is Lincoln's value-positioned alternative to Excalibur, delivering the same E7018-1 H4R AWS classification and moisture-resistant coating at a more accessible price point for everyday code-quality fabrication.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"parent-spec-overview\"\u003e\n  \u003ch2\u003eSpecifications\u003c\/h2\u003e\n  \u003ctable class=\"grade-spec-table\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003cth\u003eAWS classification\u003c\/th\u003e\n\u003ctd\u003eAWS A5.1\/A5.1M E7018-1\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eMinimum tensile\u003c\/th\u003e\n\u003ctd\u003e70 ksi minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003ePolarity \/ position\u003c\/th\u003e\n\u003ctd\u003eDC+ or AC, all positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eAvailable diameters\u003c\/th\u003e\n\u003ctd\u003e3\/32 in through 1\/4 in (varies by package)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003ePackage formats\u003c\/th\u003e\n\u003ctd\u003esee size variants below\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection class=\"parent-buy-confidence\"\u003e\n  \u003ch2\u003eWhy buy Lincoln IronArc 7018-1 MR from WeldingMart\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrand-authorized distributor\u003c\/strong\u003e - factory-fresh stock, full warranty pass-through\u003c\/li\u003e\n    \u003cli\u003eMultiple diameter and package variants in stock - select the SKU below that matches your job\u003c\/li\u003e\n    \u003cli\u003eUS warehouse fulfillment, 1 business day ship time\u003c\/li\u003e\n    \u003cli\u003e30-day returns on unopened cartons\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"Lincoln Electric","offers":[{"title":"3\/32 in, 50 lb Easy Open Can","offer_id":44222936580247,"sku":"ED040100","price":244.2,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 50 lb Easy Open Can","offer_id":44222937006231,"sku":"ED040101","price":238.8,"currency_code":"USD","in_stock":true},{"title":"5\/32 in, 50 lb Easy Open Can","offer_id":44222937137303,"sku":"ED040102","price":238.8,"currency_code":"USD","in_stock":true},{"title":"3\/16 in, 10 lb Easy Open Can (3-Pack)","offer_id":44222937202839,"sku":"ED040103","price":153.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7140\/4695\/files\/lincoln-ed040100-ironarc-7018-1-mr-stick-smaw-welding-rod-332-14-in-50-lb-easy-open-can-lincoln-electric-1.jpg?v=1746614846"},{"product_id":"lincoln-7018-ac-stick-smaw-welding-rod","title":"Lincoln 7018-AC Stick SMAW Welding Rod","description":"\u003c!-- Stick Lane A | handle: lincoln-7018-ac-stick-smaw-welding-rod | 2026-06-16 --\u003e\n\u003csection class=\"pdp-overview\"\u003e\n  \u003ch2\u003eLincoln 7018-AC E7018 Low-Hydrogen Electrode — Overview\u003c\/h2\u003e\n  \u003cp\u003e\u003cstrong\u003eLincoln 7018-AC\u003c\/strong\u003e is an \u003cstrong\u003eAWS A5.1\/A5.1M E7018 H8\u003c\/strong\u003e low-hydrogen, iron-powder, basic-coated SMAW electrode specifically engineered to run reliably on \u003cstrong\u003eAC welding machines\u003c\/strong\u003e — including low open-circuit-voltage (OCV) farm transformers and shop buzzboxes that cannot maintain stable arcs with standard DC-formulated E7018. The potassium-enhanced coating stabilizes the AC arc cycle without sacrificing the low-hydrogen (H8) diffusible hydrogen content and 70 ksi tensile strength that make E7018 the universal standard for structural and pressure vessel code welding. \u003cstrong\u003eDC+ or AC; all positions.\u003c\/strong\u003e WeldingMart stocks Lincoln 7018-AC as an authorized Lincoln Electric distributor — select your diameter and package size in the variant selector above.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"pdp-specs\"\u003e\n  \u003ch2\u003eSpecifications\u003c\/h2\u003e\n  \u003ctable class=\"grade-spec-table\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003cth\u003eAWS classification\u003c\/th\u003e\n\u003ctd\u003eAWS A5.1\/A5.1M E7018 H8\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eCoating type\u003c\/th\u003e\n\u003ctd\u003eLow-hydrogen, iron-powder basic, potassium-enhanced for AC\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003ePolarity\u003c\/th\u003e\n\u003ctd\u003eDC+ (DCEP) or AC\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eWelding positions\u003c\/th\u003e\n\u003ctd\u003eAll positions: 1G, 2G, 3G, 4G (flat, horizontal, vertical, overhead)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eMinimum tensile strength\u003c\/th\u003e\n\u003ctd\u003e70,000 psi (483 MPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eMinimum yield strength\u003c\/th\u003e\n\u003ctd\u003e58,000 psi (400 MPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eElongation\u003c\/th\u003e\n\u003ctd\u003e22% minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eCharpy V-notch\u003c\/th\u003e\n\u003ctd\u003e20 ft-lb at −20°F (27 J at −29°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eDiffusible hydrogen\u003c\/th\u003e\n\u003ctd\u003eH8 — ≤ 8 mL\/100g deposited weld metal\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eTypical current range\u003c\/th\u003e\n\u003ctd\u003e3\/32 in: 60–100 A | 1\/8 in: 90–140 A | 5\/32 in: 120–180 A | 3\/16 in: 155–220 A | 7\/32 in: 190–260 A\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eAvailable diameters\u003c\/th\u003e\n\u003ctd\u003e3\/32, 1\/8, 5\/32, 3\/16, 7\/32 in\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eLincoln Electric\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eStandards compliance\u003c\/th\u003e\n\u003ctd\u003eAWS A5.1\/A5.1M; AWS D1.1 pre-qualified; ASME Section IX\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"pdp-applications\"\u003e\n  \u003ch2\u003eApplications \u0026amp; Industries\u003c\/h2\u003e\n  \u003cp\u003eLincoln 7018-AC brings the code-quality performance of E7018 to AC-only welding machines:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStructural fabrication (AWS D1.1):\u003c\/strong\u003e Prequalified for use under AWS D1.1 on carbon steel structural shapes, plate, and pipe — the same code coverage as standard E7018 DC electrodes\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFarm and maintenance welding on AC machines:\u003c\/strong\u003e The most popular choice for welders whose Lincoln AC225, Idealarc, or similar AC transformer welder cannot run standard 7018 DC reliably\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePressure vessel and pipe:\u003c\/strong\u003e ASME Section IX qualified procedures on carbon steel — fill and cap passes on pipe joints started with E6010 root pass\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShipbuilding and general manufacturing:\u003c\/strong\u003e All-position filler and cap passes on carbon steel where low-hydrogen practice is required\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-process environments:\u003c\/strong\u003e Shops with a mix of AC and DC machines that want one 7018 electrode that works across all machines\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"pdp-technique\"\u003e\n  \u003ch2\u003eProcess Technology — How to Run 7018-AC\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAC machine setup:\u003c\/strong\u003e Lincoln 7018-AC is formulated to run on AC machines with OCV as low as 50 V. Set current to the mid-range for the selected diameter. If the arc is unstable, increase amperage slightly — AC 7018 typically needs a slightly higher amperage setting than DC E7018 for comparable performance.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eArc start:\u003c\/strong\u003e Scratch-start on AC. Start on scrap or use a run-on tab if available; the first inch of a cold-start bead will have a slightly elevated hydrogen level. The arc stabilizes within 1–2 seconds.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eArc length:\u003c\/strong\u003e Short arc — 1× rod diameter maximum. A long arc increases spatter and diffusible hydrogen. This is more critical on AC because the arc extinguishes on each current reversal; short arc length helps re-ignition.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTravel angle:\u003c\/strong\u003e 5–15° drag for flat and horizontal; 5–10° push for vertical-up with slight weave or pause-at-the-toes to avoid undercut.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSlag removal:\u003c\/strong\u003e E7018 has a heavy, glassy basic slag that requires firm chipping. Remove completely between passes. Slag inclusions are the primary defect risk if interpass cleaning is skipped.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eElectrode drying after opening:\u003c\/strong\u003e See the Storage section below — 7018-AC requires oven storage after opening the container.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"pdp-storage\"\u003e\n  \u003ch2\u003eStorage \u0026amp; Handling — Low-Hydrogen Critical\u003c\/h2\u003e\n  \u003cp\u003eProper storage of E7018 is \u003cstrong\u003emandatory\u003c\/strong\u003e to maintain the H8 hydrogen designation and prevent hydrogen-induced cracking (HICC) in structural joints:\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUnopened packaging:\u003c\/strong\u003e Store in original sealed carton in a dry location at ambient temperature (40–120°F). Original Lincoln cartons are moisture-resistant but not hermetically sealed.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAfter opening:\u003c\/strong\u003e Transfer immediately to a rod oven at 250–300°F (121–149°C). Do not leave 7018 in open air — moisture absorption begins within 30–60 minutes in humid conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIn the field:\u003c\/strong\u003e Use a heated electrode quiver (at least 150–200°F). Remove only the rods needed for the current work session.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e4-hour rule:\u003c\/strong\u003e Remove only what you need; use within 4 hours of removing from the holding oven. Any rods unused after 4 hours must return to the oven.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReconditioning:\u003c\/strong\u003e Per AWS A5.1, E7018 may be reconditioned at 500–800°F (260–427°C) for 1 hour. The Lincoln recommended temperature for 7018-AC is 500–600°F for 1 hour. Do not recondition more than once, and discard rods with visibly cracked or damaged coatings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"pdp-faq\"\u003e\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eWhen should I use 7018 instead of 6013?\u003c\/dt\u003e\n    \u003cdd\u003eUse E7018 for structural and code-governed welding on mild and low-alloy carbon steel — AWS D1.1 structural frames, ASME pressure piping, and any application requiring low-hydrogen weld metal. E6013 is for light fabrication, maintenance, and training where code compliance and low hydrogen are not required. On thick plate or restraining joints, E7018 significantly reduces the risk of hydrogen-induced cracking that would occur with E6013's higher hydrogen level.\u003c\/dd\u003e\n\n    \u003cdt\u003eWhat is the difference between 7018 and 7018-AC?\u003c\/dt\u003e\n    \u003cdd\u003eStandard E7018 is formulated primarily for DC+ operation, though most are technically classified for DC+ or AC. Lincoln 7018-AC specifically uses a potassium-enriched coating that provides exceptional arc stability on AC machines — including low-OCV farm welders that cannot maintain a stable arc with standard 7018. For DC machines (inverters, engine drives), standard \u003ca href=\"\/products\/lincoln-excalibur-7018-stick-smaw-welding-rod\"\u003eLincoln Excalibur 7018\u003c\/a\u003e is preferred. For AC machines, 7018-AC is the better choice.\u003c\/dd\u003e\n\n    \u003cdt\u003eHow do you store 7018 welding rods?\u003c\/dt\u003e\n    \u003cdd\u003eAfter opening the original packaging, store 7018 rods in a rod oven at 250–300°F (121–149°C). In the field, use a heated quiver at 150–200°F. Remove only the rods needed for 4 hours of welding at a time. Rods exposed to ambient air for more than 4 hours should be returned to the oven or reconditioned at 500–600°F for 1 hour. Never store open 7018 without heat — moisture absorption will increase diffusible hydrogen above the H8 limit, risking weld cracking.\u003c\/dd\u003e\n\n    \u003cdt\u003eCan 7018-AC run on DC machines too?\u003c\/dt\u003e\n    \u003cdd\u003eYes. Lincoln 7018-AC is dual-polarity — it runs on both AC and DC+ (DCEP). It is an excellent universal electrode for shops with a mix of AC and DC machines. Performance on DC is comparable to standard E7018, though Lincoln's Excalibur 7018 H4R (DC+ only, H4 hydrogen) is preferred for critical DC applications requiring the lowest possible hydrogen level.\u003c\/dd\u003e\n\n    \u003cdt\u003eWhat is E7018 used for?\u003c\/dt\u003e\n    \u003cdd\u003eE7018 is the most widely used structural SMAW electrode in North America. It is prequalified for AWS D1.1 structural steel welding and commonly used for fill and cap passes on carbon steel plate and pipe. It is the standard \"production\" electrode for fabrication shops, ironworkers, and pipe welders running multi-pass joints started with an E6010 root pass.\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"pdp-crosslinks\"\u003e\n  \u003cp\u003e\u003cstrong\u003eBrowse all 7018 electrodes:\u003c\/strong\u003e \u003ca href=\"\/collections\/stick-welding-electrodes-rods\"\u003eStick Welding Electrodes \u0026amp; Rods\u003c\/a\u003e — or pair with a \u003ca href=\"\/products\/lincoln-fleetweld-5p-stick-smaw-welding-rod\"\u003eLincoln Fleetweld 5P+ E6010 root pass\u003c\/a\u003e for structural pipe procedure.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"When should I use 7018 instead of 6013?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Use E7018 for structural and code-governed welding (AWS D1.1, ASME) requiring low-hydrogen weld metal. Use E6013 for light fabrication, maintenance, and training where code compliance and low hydrogen are not required.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between 7018 and 7018-AC?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Lincoln 7018-AC uses a potassium-enriched coating for exceptional arc stability on AC machines — including low-OCV farm welders. For DC machines, standard Lincoln Excalibur 7018 is preferred. For AC machines, 7018-AC is the better choice.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do you store 7018 welding rods?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"After opening, store 7018 in a rod oven at 250–300°F. Use a heated quiver at 150–200°F in the field. Remove only 4 hours' worth of rods at a time. Recondition at 500–600°F for 1 hour if rods have been out longer. Never leave open 7018 in ambient air — moisture absorption increases diffusible hydrogen above the H8 limit.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is E7018 used for?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"E7018 is the most widely used structural SMAW electrode in North America, prequalified for AWS D1.1 structural steel welding. It is the standard fill and cap electrode for fabrication shops and pipe welders, often used with an E6010 root pass in multi-pass pipe procedures.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n","brand":"Lincoln Electric","offers":[{"title":"3\/32 in, 50 lb Easy Open Can","offer_id":43638081388695,"sku":"ED031732","price":225.38,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 50 lb Easy Open Can","offer_id":43638081781911,"sku":"ED031734","price":275.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7140\/4695\/files\/lincoln-ed031732-lincoln-7018-ac-stick-smaw-electrode-332x14-in-50-lb-easy-open-can-lincoln-electric.jpg?v=1765594867"},{"product_id":"lincoln-7018-ac-rsp-stick-smaw-welding-rod","title":"Lincoln 7018-AC RSP Stick SMAW Welding Rod","description":"\u003cp\u003eLincoln 7018-AC RSP is a low-hydrogen E7018 welding rod specifically formulated for outstanding performance on AC (alternating current) power sources — including older transformer buzz-boxes, AC engine-driven welders, and multi-operator machines. Where standard E7018 electrodes can be finicky on AC due to re-ionization demands, the 7018-AC RSP's potassium-enhanced flux chemistry delivers smooth, stable arc performance even on 60 Hz AC machines with moderate open-circuit voltage. The RSP designation (Rotary Slag Peeling) indicates the flux is engineered for fast, self-releasing slag that peels cleanly in all positions for efficient production welding.\u003c\/p\u003e\n\n\u003ch2\u003eWhat Is the Lincoln 7018-AC RSP E7018 Welding Rod?\u003c\/h2\u003e\n\u003cp\u003eLincoln 7018-AC RSP is Lincoln Electric's AC-optimized E7018 iron-powder low-hydrogen SMAW electrode. The AWS classification E7018 applies: \"E\" = electrode; \"70\" = 72,000 psi minimum tensile; \"1\" = all-position; \"8\" = low-hydrogen iron-powder covering with AC or DCEP polarity. The standard E7018 flux uses sodium-based stabilizers that can produce erratic arc behavior on 60 Hz AC power due to the brief extinction at each polarity reversal. Lincoln's 7018-AC RSP upgrades the stabilizer system with potassium compounds that re-ionize more easily at the AC zero crossing, producing a smooth, steady arc on AC machines that would cause standard E7018 to sputter, stick, or extinguish. This makes 7018-AC RSP the designated solution for contractors and shops that operate exclusively on AC power — construction sites with 480 V transformer-based welding machines, rural operations with AC engine-driven welders, and multi-operator welding systems that supply AC to each station. The RSP (Rotary Slag Peeling) technology ensures the slag lifts cleanly after each pass, maintaining production pace and inter-pass cleanliness consistent with standard low-hydrogen practice. Despite the AC optimization, 7018-AC RSP also performs well on DCEP for shops that transition between AC and DC machines.\u003c\/p\u003e\n\n\u003ch2\u003eAWS Classification \u0026amp; Mechanical Specs — 7018-AC RSP E7018 Welding Rod\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAWS Classification\u003c\/td\u003e\n\u003ctd\u003eE7018\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength (min.)\u003c\/td\u003e\n\u003ctd\u003e72,000 psi (496 MPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eYield Strength (min.)\u003c\/td\u003e\n\u003ctd\u003e60,000 psi (414 MPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eElongation (min.)\u003c\/td\u003e\n\u003ctd\u003e22%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCharpy CVN (−20°F)\u003c\/td\u003e\n\u003ctd\u003e20 ft·lbf minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlux Type\u003c\/td\u003e\n\u003ctd\u003eLow-hydrogen iron-powder, potassium-stabilized AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003eAC (optimized), DCEP\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePositions\u003c\/td\u003e\n\u003ctd\u003eAll (F, H, V-up, OH)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpecial Feature\u003c\/td\u003e\n\u003ctd\u003eRSP — Rotary Slag Peeling for fast slag removal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDiameters\u003c\/td\u003e\n\u003ctd\u003e3\/32, 1\/8, 5\/32, 3\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe 22 % elongation and 20 ft·lbf CVN at −20 °F confirm that 7018-AC RSP meets the same structural performance requirements as standard E7018 — the AC optimization does not compromise the mechanical properties. This is important because some AC-capable electrodes historically traded hydrogen control for AC compatibility; 7018-AC RSP maintains full low-hydrogen classification.\u003c\/p\u003e\n\n\u003ch2\u003eBest Applications for 7018-AC RSP E7018 Welding Rods\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstruction sites with AC-only transformer-based welding machines\u003c\/strong\u003e — building structural steel, pre-engineered metal buildings, and infrastructure work where the site transformer machine is AC.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-operator AC welding systems\u003c\/strong\u003e — multi-operator transformer welders supply AC to multiple weld stations simultaneously; 7018-AC RSP runs on each station without the arc instability that plagues standard E7018 on AC multi-operator systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRural and remote operations with AC engine-driven welders\u003c\/strong\u003e — some engine-driven welders supply AC output for stick welding; 7018-AC RSP is the specified low-hydrogen rod for these machines.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStructural fabrication shops with AC-only machine fleets\u003c\/strong\u003e — shops that have not upgraded to DC inverters and still operate AC transformer machines benefit from 7018-AC RSP over standard E7018 on AC.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGeneral structural fabrication per AWS D1.1\u003c\/strong\u003e — any D1.1 application where low-hydrogen filler is required and the machine is AC.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRepair and maintenance welding on AC machines in field environments\u003c\/strong\u003e — bridge repair, highway infrastructure maintenance, and field structural welding with AC machines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use 7018-AC RSP — Amperage, Polarity \u0026amp; Position\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003cth\u003eAmperage (AC)\u003c\/th\u003e\n\u003cth\u003eAmperage (DCEP)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/32 in\u003c\/td\u003e\n\u003ctd\u003e65–100 A\u003c\/td\u003e\n\u003ctd\u003e60–90 A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e1\/8 in\u003c\/td\u003e\n\u003ctd\u003e90–140 A\u003c\/td\u003e\n\u003ctd\u003e85–130 A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e5\/32 in\u003c\/td\u003e\n\u003ctd\u003e120–175 A\u003c\/td\u003e\n\u003ctd\u003e115–165 A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/16 in\u003c\/td\u003e\n\u003ctd\u003e160–225 A\u003c\/td\u003e\n\u003ctd\u003e155–215 A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eAC machine OCV:\u003c\/strong\u003e 7018-AC RSP is designed to run reliably on AC machines with OCV as low as 50–55 V, compared to 70+ V typically needed for standard E7018 on AC. This enables use on older or smaller transformer machines that cannot support standard E7018. Set OCV to maximum available setting on the machine for best arc starts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eArc length:\u003c\/strong\u003e Short arc is still essential for low-hydrogen performance — 1\/2 to 1× core diameter. The potassium stabilizers improve AC re-ignition but a long arc still introduces porosity risk through atmospheric nitrogen pickup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePosition technique:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cem\u003eFlat\/horizontal:\u003c\/em\u003e Straight stringer or slight weave; 5–15° drag angle.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cem\u003eVertical-up:\u003c\/em\u003e J-weave or triangular weave; reduce amperage 10–15 A below midrange.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cem\u003eOverhead:\u003c\/em\u003e Low end of amperage range; short arc; forehand technique.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eStorage \u0026amp; Handling for 7018-AC RSP Low-Hydrogen Electrodes\u003c\/h2\u003e\n\u003cp\u003e7018-AC RSP follows the same low-hydrogen storage protocol as all E7018 classifications:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSealed container storage:\u003c\/strong\u003e Indefinite shelf life in original sealed Lincoln container in a dry area.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHolding oven (mandatory once opened):\u003c\/strong\u003e 250–300 °F. Do not leave opened canisters unattended in shop environments overnight.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRedrying:\u003c\/strong\u003e If moisture-exposed, dry at 700–800 °F for 1 hour. This is required — not optional — for H-rated electrodes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAWS D1.1 exposure limits:\u003c\/strong\u003e Follow Table 4.7 time limits for E7018 (without H4R designation unless confirmed by the packaging) — typically 4 hours maximum in low-humidity environments, less in high-humidity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Base Metals \u0026amp; Joint Types for E7018 AC\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eASTM A36 structural steel\u003c\/li\u003e\n  \u003cli\u003eASTM A572 Grades 42, 50, 60, 65\u003c\/li\u003e\n  \u003cli\u003eASTM A516 Grades 55, 60, 65, 70\u003c\/li\u003e\n  \u003cli\u003eASTM A709 Grades 36 and 50 (bridge plate)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAll groove and fillet joint types in all positions. Same structural code applicability as standard E7018 under AWS D1.1. The AC optimization does not change the structural chemistry or code classification of the electrode — it only improves AC performance.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions — Lincoln 7018-AC RSP E7018 Welding Rod\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why does standard E7018 perform poorly on AC and what does 7018-AC fix?\u003c\/strong\u003e\u003cbr\u003e\nStandard E7018 uses sodium-based flux stabilizers. Sodium has a high ionization potential, meaning it does not re-ionize easily at the zero-crossing of a 60 Hz AC waveform. At each polarity reversal, the arc briefly extinguishes and must re-start — sodium flux can fail this re-ignition, causing sputtering, sticking, or arc extinction. Potassium has a significantly lower ionization potential and re-ionizes quickly at the AC zero crossing, maintaining a smooth, continuous arc. Lincoln 7018-AC RSP uses potassium-enhanced stabilizers to solve exactly this AC re-ignition problem.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I run 7018-AC RSP on a DC machine?\u003c\/strong\u003e\u003cbr\u003e\nYes. 7018-AC RSP runs well on DCEP as well as AC. The potassium stabilizers do not negatively affect DCEP performance. If you have both AC and DC machines in your shop, 7018-AC RSP works on all of them.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What minimum OCV do I need for 7018-AC RSP?\u003c\/strong\u003e\u003cbr\u003e\n7018-AC RSP is designed for AC machines with OCV as low as 50–55 V, compared to 70+ V typically required for standard E7018. Most AC transformers in the 225–300 A range achieve 55–80 V OCV — verify your machine's OCV against Lincoln's minimum recommendation before use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is 7018-AC RSP a low-hydrogen electrode?\u003c\/strong\u003e\u003cbr\u003e\nYes. 7018-AC RSP is a classified E7018 electrode and meets low-hydrogen requirements per AWS A5.1. It requires 250–300 °F holding oven storage once the container is opened, identical to standard E7018. The AC optimization does not affect hydrogen classification — the rod must be stored in an oven like any other E7018.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What does RSP stand for in the electrode name?\u003c\/strong\u003e\u003cbr\u003e\nRSP stands for Rotary Slag Peeling. It refers to the slag's engineered tendency to peel away from the weld bead rapidly and cleanly as the weld cools — without requiring aggressive chipping. This is particularly useful in production environments where inter-pass slag removal time is a bottleneck. The slag literally rolls or peels back as it contracts, reducing cleanup time between passes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does 7018-AC RSP meet AWS D1.1 requirements for Low Hydrogen welds?\u003c\/strong\u003e\u003cbr\u003e\nYes. 7018-AC RSP is an E7018 classification and is listed in AWS D1.1 Table 4.5 as an approved electrode for Group I and II base metals in prequalified WPS. It meets the Low Hydrogen designation required for Category F and H weld positions in D1.1.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: When should I use 7018-AC RSP instead of Excalibur 7018 MR?\u003c\/strong\u003e\u003cbr\u003e\nUse 7018-AC RSP when your primary concern is AC machine performance — when you're running an AC transformer, AC multi-operator system, or AC engine-driven welder and standard E7018 produces arc instability. Use Excalibur 7018 MR when H4R moisture-resistant credentials, premium arc quality, and Demand Critical weld applications are the priority. Both are excellent structural electrodes for their respective use cases.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\"@type\": \"Question\", \"name\": \"Why does standard E7018 fail on AC and what does 7018-AC fix?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Standard E7018 uses sodium flux that fails to re-ionize at 60 Hz AC zero crossings, causing sputtering and arc extinction. 7018-AC RSP uses potassium flux that re-ionizes easily at AC polarity reversals, maintaining a smooth continuous arc.\"}},\n    {\"@type\": \"Question\", \"name\": \"Can I run 7018-AC RSP on a DC machine?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. 7018-AC RSP runs well on DCEP. It works on both AC and DC machines.\"}},\n    {\"@type\": \"Question\", \"name\": \"What minimum OCV do I need for 7018-AC RSP?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"7018-AC RSP is designed for AC machines with OCV as low as 50-55V, compared to 70+ V for standard E7018. Most 225-300A AC transformers meet this threshold.\"}},\n    {\"@type\": \"Question\", \"name\": \"Is 7018-AC RSP a low-hydrogen electrode?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. It is E7018 classified and requires 250-300°F holding oven storage once opened, identical to standard E7018.\"}},\n    {\"@type\": \"Question\", \"name\": \"What does RSP stand for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"RSP = Rotary Slag Peeling — the slag is engineered to peel away cleanly from the bead as it cools without aggressive chipping, improving production pace.\"}},\n    {\"@type\": \"Question\", \"name\": \"Does 7018-AC RSP meet AWS D1.1 Low Hydrogen requirements?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. E7018 is listed in AWS D1.1 Table 4.5 for Group I and II base metals in prequalified WPS and meets the Low Hydrogen designation for D1.1 Category F and H positions.\"}},\n    {\"@type\": \"Question\", \"name\": \"When should I use 7018-AC RSP vs Excalibur 7018 MR?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use 7018-AC RSP when AC machine performance is the primary concern. Use Excalibur 7018 MR for H4R moisture-resistant credentials and Demand Critical applications.\"}}\n  ]\n}\n\u003c\/script\u003e\n\u003ch2\u003e7018-AC Welding Rod — Technical Notes on AC Arc Stability\u003c\/h2\u003e\n\u003cp\u003eThe physics of AC arc stability in SMAW is fundamentally different from DC arc maintenance. In DC welding, the arc is sustained continuously by thermal ionization of the arc column between electrode and workpiece. In AC welding, the arc extinguishes at each zero crossing of the 60 Hz cycle — that is, 120 times per second. Re-ignition depends on the presence of easily ionized species in the arc column at the moment the polarity reverses. Sodium compounds, used as arc stabilizers in many E7018 formulations, have an ionization energy of 5.14 eV — adequate for DC but marginal for AC re-ignition. Potassium compounds, with an ionization energy of only 4.34 eV, re-ionize significantly more easily at the AC zero crossing, providing reliable arc re-ignition 120 times per second. Lincoln 7018-AC RSP is formulated with potassium-based flux stabilizers that ensure consistent re-ignition even on AC machines with moderate open-circuit voltage (55–70 V OCV range). The RSP (Rotary Slag Peeling) technology complements the AC performance: the slag undergoes controlled thermal contraction upon cooling that generates a rotary-shear motion at the slag-weld-metal interface, lifting the slag cleanly rather than requiring aggressive chipping. This is particularly valuable in multi-pass AC production welding where slag trapping between passes is a quality risk. For AWS D1.1 structural applications on AC machines, 7018-AC RSP provides the complete Low Hydrogen, CVN-rated, all-position performance of E7018 with optimized AC arc characteristics.\u003c\/p\u003e","brand":"Lincoln Electric","offers":[{"title":"3\/32 in, 1 lb Tube","offer_id":43638093086871,"sku":"ED033512","price":54.41,"currency_code":"USD","in_stock":true},{"title":"3\/32 in, 5 lb Tube","offer_id":43638095904919,"sku":"ED033514","price":116.77,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 1 lb Tube","offer_id":43638094659735,"sku":"ED033513","price":71.83,"currency_code":"USD","in_stock":true},{"title":"1\/8 in, 5 lb Tube","offer_id":43638096298135,"sku":"ED033515","price":148.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7140\/4695\/files\/lincoln-ed033512-lincoln-7018-ac-rsp-stick-smaw-electrode-332x14-in-6-1-lb-tube-lincoln-electric.jpg?v=1765594746"},{"product_id":"lincoln-7018-stick-welding-rod","title":"Lincoln 7018 Stick Welding Rod","description":"\u003c!-- PER-161 Template A parent body | handle lincoln-7018-stick-welding-rod | bulk render --\u003e\n\u003csection class=\"parent-pdp-intro\"\u003e\n  \u003cp class=\"lead\"\u003e\u003cstrong\u003eLincoln 7018\u003c\/strong\u003e is an AWS A5.1\/A5.1M E7018 SMAW stick electrode family with 70 ksi minimum tensile and DC+ or AC, all positions operation. WeldingMart stocks 5 package and diameter variants of this grade, all sharing the same AWS classification - select the diameter and package format that fits your application below.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"parent-grade-summary\"\u003e\n  \u003ch2\u003eAbout Lincoln 7018\u003c\/h2\u003e\n  \u003cp\u003eE7018 is an AWS A5.1 low-hydrogen iron-powder basic-coated SMAW electrode with 70 ksi minimum tensile strength. It runs on DC+ or AC in all positions and is the workhorse code-quality stick electrode for structural steel, pressure vessel, pipe, and shipbuilding fabrication. The low-hydrogen coating must be kept dry: opened rods exposed beyond 4 hours typically require rebaking at 500-800 F to restore full code performance per AWS D1.1.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"parent-spec-overview\"\u003e\n  \u003ch2\u003eSpecifications\u003c\/h2\u003e\n  \u003ctable class=\"grade-spec-table\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003cth\u003eAWS classification\u003c\/th\u003e\n\u003ctd\u003eAWS A5.1\/A5.1M E7018\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eMinimum tensile\u003c\/th\u003e\n\u003ctd\u003e70 ksi minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003ePolarity \/ position\u003c\/th\u003e\n\u003ctd\u003eDC+ or AC, all positions\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eAvailable diameters\u003c\/th\u003e\n\u003ctd\u003e3\/32 in through 1\/4 in (varies by package)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003ePackage formats\u003c\/th\u003e\n\u003ctd\u003esee size variants below\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection class=\"parent-buy-confidence\"\u003e\n  \u003ch2\u003eWhy buy Lincoln 7018 from WeldingMart\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrand-authorized distributor\u003c\/strong\u003e - factory-fresh stock, full warranty pass-through\u003c\/li\u003e\n    \u003cli\u003eMultiple diameter and package variants in stock - select the SKU below that matches your job\u003c\/li\u003e\n    \u003cli\u003eUS warehouse fulfillment, 1 business day ship time\u003c\/li\u003e\n    \u003cli\u003e30-day returns on unopened cartons\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"Lincoln Electric","offers":[{"title":"3\/32 in · 1 lb Package","offer_id":45224767717527,"sku":"ED033691","price":51.34,"currency_code":"USD","in_stock":true},{"title":"3\/32 in · 5 lb Package","offer_id":45224767750295,"sku":"ED033692","price":103.92,"currency_code":"USD","in_stock":true},{"title":"1\/8 in · 1 lb Package","offer_id":45224767684759,"sku":"ED033690","price":54.29,"currency_code":"USD","in_stock":true},{"title":"1\/8 in · 5 lb Package","offer_id":45224767783063,"sku":"ED033693","price":102.24,"currency_code":"USD","in_stock":true},{"title":"5\/32 in · 5 lb Package","offer_id":45224767848599,"sku":"ED033694","price":98.64,"currency_code":"USD","in_stock":true}]}],"url":"https:\/\/weldingmart.com\/collections\/7018-welding-rods.oembed","provider":"WeldingMart.com","version":"1.0","type":"link"}