{"product_id":"lincoln-superglaze-4043-mig-welding-wire","title":"Lincoln ER4043 (SuperGlaze 4043 MIG Welding Wire)","description":"\u003c!-- Wire Lane E | lincoln-superglaze-4043-mig-welding-wire | 2026-06-16 --\u003e\n\u003ch2\u003eLincoln SuperGlaze 4043 — Premium ER4043 Aluminum MIG Wire for 6XXX Series Alloys\u003c\/h2\u003e\n\u003cp\u003eLincoln Electric SuperGlaze® 4043 is a copper-free aluminum solid MIG wire classified per \u003cstrong\u003eAWS A5.10\/A5.10M: ER4043\u003c\/strong\u003e. Containing 4.5–6.0 % silicon, SuperGlaze 4043 has a lower melting point and greater fluidity than 5XXX series filler alloys, producing a wider, flatter bead that flows readily into joint grooves. This silicon-based chemistry gives ER4043 the lowest sensitivity to hot cracking of any aluminum filler alloy — a critical attribute when welding crack-susceptible 6XXX series base metals (6061, 6063, 6082) that would otherwise crack with pure 1XXX or 5XXX fillers. SuperGlaze 4043 also tolerates elevated service temperatures above 65 °C (150 °F), making it the recommended choice for automotive frame components, heat exchanger tubing, and bicycle frames that operate in warm environments. The \u003cstrong\u003eDCEP polarity\u003c\/strong\u003e and \u003cstrong\u003e100 % Argon shielding gas\u003c\/strong\u003e requirement are standard for all aluminum MIG welding.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAWS Classification\u003c\/td\u003e\n\u003ctd\u003eER4043 (AWS A5.10\/A5.10M: 2012 \/ ASME SFA-A5.10)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCWB Classification\u003c\/td\u003e\n\u003ctd\u003eCWB\/CSA W48 ER4043\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAvailable Diameters\u003c\/td\u003e\n\u003ctd\u003e0.030 in (0.8 mm), 0.035 in (0.9 mm), 3\/64 in (1.2 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShielding Gas\u003c\/td\u003e\n\u003ctd\u003e100 % Argon; 30–50 CFH (14–24 L\/min)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePolarity\u003c\/td\u003e\n\u003ctd\u003eDCEP (DC electrode positive)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWelding Positions\u003c\/td\u003e\n\u003ctd\u003eAll positions (1G, 2G, 3G, 4G)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength (minimum)\u003c\/td\u003e\n\u003ctd\u003e29 ksi (200 MPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSilicon (Si)\u003c\/td\u003e\n\u003ctd\u003e4.5–6.0 %\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAluminum (Al)\u003c\/td\u003e\n\u003ctd\u003eRemainder (balance)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eIron (Fe)\u003c\/td\u003e\n\u003ctd\u003e0.80 % maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCopper (Cu)\u003c\/td\u003e\n\u003ctd\u003e0.30 % maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMelting Range\u003c\/td\u003e\n\u003ctd\u003e573–625 °C (1,063–1,157 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBase Alloy Compatibility\u003c\/td\u003e\n\u003ctd\u003e1XXX, 3XXX, 6XXX series, and most aluminum casting alloys\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications and Industries\u003c\/h2\u003e\n\u003cp\u003eSuperGlaze 4043's ER4043 chemistry per \u003ca href=\"https:\/\/www.aws.org\/standards\/detail\/AWS-A5-10-2012\" rel=\"nofollow\"\u003eAWS A5.10\u003c\/a\u003e makes it the preferred aluminum MIG wire for 6XXX series heat-treatable alloys and casting repair:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomotive and transportation\u003c\/strong\u003e — frame rails, drive shafts, engine mounts, and suspension components on 6061-T6 and 6063-T5 extrusions; automotive manufacturers specify 4043 for crack-sensitive 6XXX base metal combinations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBicycle and sporting equipment frames\u003c\/strong\u003e — 6061 tube-to-tube TIG and MIG joints where hot crack resistance and smooth bead finish are required\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat exchangers and HVAC systems\u003c\/strong\u003e — tube-to-header welds and manifold assemblies in elevated-temperature service above 65 °C where 5356 is not recommended\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine hardware and marine structures\u003c\/strong\u003e — 6061 extrusion fabrication, boat railings, and marine architectural components\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAluminum casting repair\u003c\/strong\u003e — foundry casting repair on 356, 380, and 413 casting alloys where 4043's silicon content matches the silicon-rich casting chemistry\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGeneral 6XXX fabrication\u003c\/strong\u003e — window frames, ladder rails, architectural panels, and consumer goods manufactured from 6061 or 6063 aluminum\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProcess Technology and Alloy Selection Guide\u003c\/h2\u003e\n\u003cp\u003eER4043's 4.5–6.0 % silicon content serves two functions: it reduces the solidification temperature range (narrowing the \"mushy zone\" where hot cracking nucleates) and it increases weld metal fluidity for better groove filling and toe wash-in. When 6XXX base metals are welded with silicon-free or low-silicon fillers, the base metal silicon diffuses into the weld pool and creates a crack-susceptible alloy composition. ER4043 pre-saturates the pool with silicon, preventing this crack-sensitive intermediate composition.\u003c\/p\u003e\n\u003cp\u003eThe 100 % Argon shielding gas is mandatory for aluminum MIG welding. Argon provides stable cathodic cleaning that removes the aluminum oxide layer (Al₂O₃) as the arc sweeps across the base metal, ensuring fusion without oxide inclusion. Gas flow rates of 30–50 CFH (14–24 L\/min) are typically required; higher flow rates may be needed in drafty conditions. Per \u003ca href=\"https:\/\/www.lincolnelectric.com\/en-us\/products\/consumables\/Pages\/superglaze-4043.aspx\" rel=\"nofollow\"\u003eLincoln Electric SuperGlaze 4043 product data\u003c\/a\u003e, do not use CO₂ or Ar\/CO₂ blends with aluminum wire — these gases will produce an unstable arc and excessive oxidation. ER4043 welds are not suitable for anodizing (ER5356 is recommended if anodizing is required).\u003c\/p\u003e\n\n\u003ch2\u003ePolarity and Parameter Table\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003cth\u003ePolarity\u003c\/th\u003e\n\u003cth\u003eGas\u003c\/th\u003e\n\u003cth\u003eCTWD\u003c\/th\u003e\n\u003cth\u003eWFS (in\/min)\u003c\/th\u003e\n\u003cth\u003eVoltage (V)\u003c\/th\u003e\n\u003cth\u003eCurrent (A)\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e0.035 in (0.9 mm)\u003c\/td\u003e\n\u003ctd\u003eDCEP\u003c\/td\u003e\n\u003ctd\u003e100% Ar\u003c\/td\u003e\n\u003ctd\u003e1\/2–5\/8 in\u003c\/td\u003e\n\u003ctd\u003e585 (recommended)\u003c\/td\u003e\n\u003ctd\u003e14–24\u003c\/td\u003e\n\u003ctd\u003e170\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e3\/64 in (1.2 mm)\u003c\/td\u003e\n\u003ctd\u003eDCEP\u003c\/td\u003e\n\u003ctd\u003e100% Ar\u003c\/td\u003e\n\u003ctd\u003e1\/2–5\/8 in\u003c\/td\u003e\n\u003ctd\u003e350 (recommended)\u003c\/td\u003e\n\u003ctd\u003e14–24\u003c\/td\u003e\n\u003ctd\u003e195\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv itemscope itemtype=\"https:\/\/schema.org\/FAQPage\"\u003e\n  \u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n    \u003ch3 itemprop=\"name\"\u003eWhat is the AWS classification for Lincoln SuperGlaze 4043?\u003c\/h3\u003e\n    \u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n      \u003cp itemprop=\"text\"\u003eSuperGlaze 4043 is classified as \u003cstrong\u003eER4043 per AWS A5.10\/A5.10M: 2012\u003c\/strong\u003e and ASME SFA-A5.10. The designation means: E = electrode, R = rod (usable as TIG filler), 4043 = the alloy composition number (Al-Si alloy with 4.5–6.0 % Si). It is also approved to CWB\/CSA W48 ER4043 for Canadian Welding Bureau requirements.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n    \u003ch3 itemprop=\"name\"\u003eWhat shielding gas should I use with SuperGlaze 4043?\u003c\/h3\u003e\n    \u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n      \u003cp itemprop=\"text\"\u003e\u003cstrong\u003e100 % Argon\u003c\/strong\u003e is required. Aluminum MIG welding relies on the cathodic etching action of pure Argon to break up and remove the aluminum oxide (Al₂O₃) layer during welding. Gas flow should be set at \u003cstrong\u003e30–50 CFH (14–24 L\/min)\u003c\/strong\u003e. Do not use CO₂, Ar\/CO₂ blends, or Ar\/He blends for standard MIG aluminum welding — these gases compromise arc stability and promote oxidation.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n    \u003ch3 itemprop=\"name\"\u003eWhen should I use ER4043 vs ER5356 for aluminum?\u003c\/h3\u003e\n    \u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n      \u003cp itemprop=\"text\"\u003eUse \u003cstrong\u003eER4043 (SuperGlaze 4043)\u003c\/strong\u003e when welding: 6XXX series base metals (6061, 6063, 6082) where hot crack resistance is critical; casting alloys (356, 380); applications at elevated temperatures \u0026gt; 65 °C; or when a smoother, flatter bead with lower spatter is desired. Use \u003cstrong\u003eER5356\u003c\/strong\u003e when: welding 5XXX series base metals; the part will be anodized (4043 welds turn dark gray after anodizing); or higher weld deposit tensile strength (\u0026gt; 40 ksi) is needed for structural aluminum applications.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n    \u003ch3 itemprop=\"name\"\u003eCan SuperGlaze 4043 be used for TIG welding?\u003c\/h3\u003e\n    \u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n      \u003cp itemprop=\"text\"\u003eYes — the \"ER\" in ER4043 means the wire qualifies as both a MIG electrode and a TIG filler rod. SuperGlaze 4043 cut lengths can be used as filler rod in GTAW (TIG) applications on 6XXX and casting alloys. For TIG welding aluminum, use AC power with 100 % Argon shielding gas, the same alloy selection criteria apply.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n    \u003ch3 itemprop=\"name\"\u003eWhy is ER4043 not recommended if the part will be anodized?\u003c\/h3\u003e\n    \u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n      \u003cp itemprop=\"text\"\u003eER4043's high silicon content causes the weld bead to appear \u003cstrong\u003edark gray to black after anodizing\u003c\/strong\u003e — the silicon does not anodize the same color as the surrounding aluminum. If the finished part will be anodized for appearance (architectural components, consumer products), use ER5356 which produces a silver finish closer to the base metal color after anodizing. For functional anodizing (corrosion protection without color matching), ER4043 is acceptable.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eBrowse the full \u003ca href=\"\/collections\/welding-wire\"\u003ewelding wire collection\u003c\/a\u003e, or see related Lincoln Electric wire products: \u003ca href=\"\/products\/lincoln-superarc-l-56-mig-welding-wire\"\u003eSuperArc L-56\u003c\/a\u003e for carbon steel MIG, or \u003ca href=\"\/products\/harris-er70s-6-mig-gmaw-welding-wire\"\u003eHarris ER70S-6\u003c\/a\u003e for mild steel GMAW.\u003c\/p\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\": \"What is the AWS classification for Lincoln SuperGlaze 4043?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"ER4043 per AWS A5.10\/A5.10M: 2012 and ASME SFA-A5.10. ER4043 is an Al-Si alloy with 4.5-6.0% Si. Also approved to CWB\/CSA W48 ER4043.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What shielding gas should I use with SuperGlaze 4043?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"100% Argon is required at 30-50 CFH (14-24 L\/min). Do not use CO2 or Ar\/CO2 blends — these compromise arc stability and promote oxidation of aluminum.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"When should I use ER4043 vs ER5356 for aluminum?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use ER4043 for 6XXX series base metals, casting alloys, elevated-temperature service, and when hot crack resistance is critical. Use ER5356 when the part will be anodized, for 5XXX base metals, or when higher tensile strength (\u003e40 ksi) is required.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can SuperGlaze 4043 be used for TIG welding?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — the 'ER' classification allows SuperGlaze 4043 to be used as a TIG filler rod for GTAW on 6XXX and casting alloys. Use AC power and 100% Argon for TIG aluminum.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why is ER4043 not recommended if the part will be anodized?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"ER4043's high silicon content causes the weld bead to appear dark gray to black after anodizing, not matching the base aluminum color. Use ER5356 instead for anodized appearance applications.\"}\n    }\n  ]\n}\n\u003c\/script\u003e\n","brand":"Lincoln Electric","offers":[{"title":"0.035 in · 16 lb Spool","offer_id":43638052094103,"sku":"ED028395","price":165.84,"currency_code":"USD","in_stock":true},{"title":"0.035 in · (20) 1 lb Spool","offer_id":43638078898327,"sku":"ED030308","price":217.6,"currency_code":"USD","in_stock":true},{"title":"0.035 in · 300 lb Gem-Pak Box","offer_id":43639135469719,"sku":"ED036609","price":2696.4,"currency_code":"USD","in_stock":true},{"title":"3\/64 in · 20 lb Spool","offer_id":43638083256471,"sku":"ED029234","price":179.88,"currency_code":"USD","in_stock":true},{"title":"3\/64 in · (20) 1 lb Spool","offer_id":43637607661719,"sku":"ED030310","price":210.45,"currency_code":"USD","in_stock":true},{"title":"3\/64 in · 300 lb Gem-Pak Box","offer_id":43639135371415,"sku":"ED036610","price":3412.76,"currency_code":"USD","in_stock":true},{"title":"1\/16 in · 20 lb Spool","offer_id":43638074605719,"sku":"ED030281","price":198.61,"currency_code":"USD","in_stock":true},{"title":"1\/16 in · 300 lb Gem-Pak Box","offer_id":43639135273111,"sku":"ED036611","price":3201.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7140\/4695\/files\/lincoln-ed028395-superglaze-4043-mig-gmaw-aluminum-welding-wire-0-035-in-16-lb-spool-lincoln-electric.jpg?v=1765569726","url":"https:\/\/weldingmart.com\/products\/lincoln-superglaze-4043-mig-welding-wire","provider":"WeldingMart.com","version":"1.0","type":"link"}