Lincoln Excalibur 7018 XMR (3/32 x 14 in) is an AWS A5.1/A5.1M E7018 H4R 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.
AWS classification |
AWS A5.1/A5.1M E7018 H4R |
|---|---|
Lincoln designation |
Excalibur 7018 XMR (Extra Moisture Resistant) |
Coating type |
Iron powder / low-hydrogen (extra moisture-resistant) |
Rod diameter |
3/32 in (2.4 mm) |
Rod length |
14 in (356 mm) |
Polarity |
DC+ (DCEP) preferred; AC acceptable |
Welding positions |
All positions: 1G, 2G, 3G, 4G |
Min tensile strength |
70,000 psi (483 MPa) |
Min yield strength |
58,000 psi (400 MPa) |
Elongation |
22% minimum |
Max diffusible hydrogen |
≤4 mL/100g (H4 designation) |
Moisture resistance |
R designation + XMR enhanced moisture resistance |
Typical current range |
3/32 in: 55–90 A |
Manufacturer |
Lincoln Electric |
Standards compliance |
AWS A5.1/A5.1M E7018 H4R |
Root pass welding on structural steel: 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.
Thin-plate structural welding (3/16 – 3/8 in): 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
Vertical and overhead code welding: 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
Field welding with extended rod exposure: 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
Structural repairs in confined spaces: Smaller diameter and 14 in length provide improved access in confined welds where standard 1/8 in × 18 in rods are impractical
Seismic and fracture-critical welds: 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
Amperage for 3/32 in: 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.
Polarity: DC+ (DCEP) preferred for maximum penetration and optimal H4 hydrogen performance. AC is acceptable per E7018 designation. For structural code applications, use DC+.
Short arc length: 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.
XMR out-of-oven advantage: 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.
3/32 in vertical-up technique: 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.
Root pass technique: 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.
XMR advantage: 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
Store in sealed original packaging at ambient temperature before opening
Once opened, store in a holding oven at 250–300°F (121–149°C) for all code-critical applications
For redrying: 500–800°F (260–427°C) for 1–2 hours per Lincoln Electric recommendations
Store separately from non-7018 electrodes to prevent mixing
Base metals: 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
Joint types: 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
Fracture-critical and seismic: H4R classification meets the most stringent hydrogen control requirements for AWS D1.1 fracture-critical work and AWS D1.8 seismic provisions
What is E7018 XMR welding rod?
Lincoln 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.
What is the difference between E7018 XMR and E7018 MR?
Both 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.
What amperage for 3/32 inch 7018 electrodes?
For 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.
Is 3/32 E7018 good for root passes?
Yes — 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.
Can Lincoln 7018 XMR be used without an oven on job sites?
The 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.
What is the smallest diameter Excalibur 7018 available?
Lincoln 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.
Does E7018 XMR have the same mechanical properties as standard E7018?
Yes — 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.
Browse all stick electrodes: Stick Welding Electrodes & Rods — compare with Excalibur 7018 MR for standard moisture-resistant 7018 performance, or Excalibur 7018-1 MR 3/32 for enhanced notch toughness at this same diameter.
This 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.
When 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.
When 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.
Lincoln 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.
| Electrode Diameter | Base Metal Range | Amperage Range | Best Position |
|---|---|---|---|
| 3/32 in (2.4 mm) | 3/32 in to 1/4 in (2.4–6.4 mm) | 40–80 A | All positions |
The 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.
When 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.
Additional 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.
For 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.
Lincoln 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.
| Electrode Diameter | Base Metal Range | Amperage Range | Best Position |
|---|---|---|---|
| 3/32 in (2.4 mm) | 3/32 in to 1/4 in (2.4–6.4 mm) | 40–80 A | All positions |
The 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.
When 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.
Additional 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.
For 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.
Lincoln 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.
| Electrode Diameter | Base Metal Range | Amperage Range | Best Position |
|---|---|---|---|
| 3/32 in (2.4 mm) | 3/32 in to 1/4 in (2.4–6.4 mm) | 40–80 A | All positions |
The 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.
When 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.
Additional 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.
For 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.