ER312 MIG & TIG Welding Wire

At Metals And Welding Specialities, we proudly supply the high-performance ER312 MIG & TIG Welding Wire welding wire—an exceptional filler metal engineered for critical welding applications that demand superior strength, corrosion resistance, and durability. Classified under UNS S31280 and meeting the stringent requirements of ASTM A580/A580M Grade ER312, this alloy is widely recognized in both MIG and TIG welding for its remarkable versatility and metallurgical stability.

The ER312 stainless steel welding wire is formulated with a high chromium (29–32%) and nickel (8–10%) composition, offering outstanding resistance to oxidation, scaling, and heat-induced cracking. It is the go-to choice when welding dissimilar steels or hard-to-weld materials such as high-carbon steels, tool steels, or stainless steels of unknown composition. The superior metallurgical balance of this alloy produces a tough, crack-resistant weld deposit that performs reliably even in extreme service conditions.

When used in MIG (GMAW) or TIG (GTAW) processes,ER312 ensures clean, stable arc characteristics with minimal spatter and excellent slag detachability. Welders appreciate its smooth feedability and consistent bead appearance, which reduce post-weld cleanup time. Thanks to its high ferrite-austenite structure, the wire resists cracking and provides enhanced toughness at both high and low temperatures. Whether joining austenitic stainless steels to mild steel or repairing wear-resistant components, ER312 welding wire maintains superior integrity and corrosion resistance over the long term.

This product’s compliance with ASTM A580/A580M specifications ensures dependable chemical and mechanical properties across all batches. The UNS S31280 classification further attests to its precision engineering and adherence to global quality standards. Its reliable performance in structural fabrication, chemical processing, maintenance welding, and repair operations makes it a trusted choice across diverse industries such as petrochemical, power generation, mining, and manufacturing.

At Metals And Welding Specialities, every spool of ER312 MIG & TIG wire undergoes stringent quality checks to guarantee consistent diameter, clean surface finish, and optimal wire feed efficiency. We understand that weld quality defines product life, so our focus remains on providing filler metals that deliver unmatched mechanical strength and corrosion resistance in every weld.

For optimal results, use ER312 filler wire with argon or argon-based shielding gases to ensure smooth, stable arcs and superior penetration. Its unique metallurgical composition prevents dilution effects that typically reduce strength in mixed-metal welds. When durability, safety, and performance are non-negotiable,ER312 stands as a dependable solution engineered to exceed expectations in demanding welding environments.

• Specification ER312 MIG & TIG Welding Wire

  Classification	AWS A5.9, ER310
  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 ER310 MIG & TIG Filler Metal Application & uses	Hardware tools Metallurgy Machinery Construction Shipbuilding Petroleum Chemical plant Power sector Gas Industry

• Equivalent Grade Of AWS ERCuNi MIG & TIG

  Class	UNS	Oxford Alloys	BOHLER
  ER310	S31080	Alloy 310	BOHLER THERMAINT 310

• ER312 MIG & TIG Welding Wire Chemical Composition

  C	Cr	Ni	Mo	Mn	Si	P	S	Cu
  0.08-0.15	25.0-28.0	20.0-22.5	0.75	1.0-2.5	0.30-0.65	0.03	0.03	0.75

• ER312 MIG & TIG Welding Wire Parameters

  Diameter		Process	Volt	Amps
  in	(mm)
  .035	(0.9)	GTAW	12-15	60-90
  .045	(1.14)	GTAW	13-16	80-110
  1/16”	(1.6)	GTAW	14-16	90-130
  3/32”	(2.4)	GTAW	15-20	120-175

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