Home > Electrodes > AWS Class ER312 MIG & TIG Filler Welding Wire & Rod
Ed Stainless presents AWS Class ER312 MIG and TIG filler welding wire and rod, designed for demanding repair and overlay applications. Manufactured in Houston, USA, ER312 has high chromium and nickel content for excellent resistance to intergranular corrosion and oxidation. Its strong chemical makeup makes it ideal for welding dissimilar metals like stainless to carbon steel. Made for both MIG and TIG processes, ER312 ensures good dilution control and weld strength. Engineers and welders choose this grade for critical overlays in petrochemical refineries, pressure vessels, and other industrial refurbishments. Ed Stainless delivers quality with reliable supply and technical support.
AWS ER312 filler contains about 23–25% chromium, 13–15% nickel, and 1% manganese, along with low carbon content. This blend boosts its ability to resist scaling, intergranular corrosion, and high-temperature oxidation. Its tensile strength is typically around 75 ksi with yield strength near 60 ksi and elongation of 25–30%. ER312’s composition allows for strong metallurgical bonding when overlaying carbon or low-alloy steels, ensuring adhesion and fatigue resistance. This filler supports both MIG and TIG welding, creating tough, crack-resistant welds that stay strong under thermal cycling and corrosive exposure.
| Classification | AWS A5.9, ER312 |
| Form | MIG spools, TIG cut lengths, Reels and Coils |
| Type Of Welding | Inert Gas Welding |
| Current | MIG-DCEP / TIG-DCEN |
| Diameters | .023”, .030”, .035”, .045”, 1/16”, 3/32”, 1/8” |
| Standard TIG straight lengths are available | 36” (914 mm) or 39” (1000 mm) lengths. Other lengths available upon request. |
| AWS ER312 MIG & TIG Filler Metal Application & uses |
|
| C | Cr | Ni | Mo | Mn | Si | P | S | Cu |
| 0.15 | 28.0-30.0 | 20.0-22.0 | 0.75 | 1.0-2.5 | 0.30-0.65 | 0.03 | 0.03 | 0.75 |
| Yield, kpsi: | 78 |
| Tensile Strength, kpsi: | 109 |
| Elongation%, min: | 45 |
Contact us to get a quick quote for your requirement.
ER312 MIG filler wire excels in welding dissimilar metals and high-strength steels, offering robust strength and corrosion resistance, ideal for heavy machinery, construction, and shipbuilding applications.
ER312 TIG filler wire provides high strength and wear resistance for welding dissimilar metals. It ensures strong, durable welds with excellent corrosion resistance, suitable for aerospace and industrial repairs.
ER312 TIG filler rod is designed for high-strength welds on dissimilar metals, offering superior durability and corrosion resistance. Ideal for demanding applications in heavy machinery and construction.
After manufacturing, our quality control team conducts comprehensive destructive and non-destructive testing using advanced tools to ensure the reliability of AWS Class ER312 MIG and TIG Filler Welding Wire and Rod. Then securely we package the products and guarantee timely delivery to customers, providing all necessary documentation along with the shipment for a seamless experience.
AWS ER312 is widely used for surfacing and overlaying projects with carbon steel components in corrosive or high-temperature environments. Typical applications involve rebuilding refinery equipment, heat exchangers, furnace parts, boiler tubes, and pressure vessels. It also finds use in welding stainless steel overlays on turbine rotors and petrochemical machinery. The robust weld deposits resist scaling and corrosion, extending component lifespan. Ed Stainless supplies ER312 wire and rod to maintenance and fabrication teams needing dependable, high-performance welders for challenging industrial conditions, backed by expert technical service and constant inventory availability.
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