ER347 MIG & TIG Welding Wire

ER347 MIG & TIG Welding Wire from Metals And Welding Specialities is a premium austenitic stainless steel filler metal designed for exceptional performance in both MIG and TIG welding applications. This wire is manufactured to meet the stringent standards of AWS A5.9 and classified under UNS S34780, ensuring consistency, durability, and precision in every weld. It’s an ideal choice for welding stabilized stainless steels such as Type 321 and 347, offering superior resistance to intergranular corrosion and excellent mechanical properties in both oxidizing and reducing environments.

The ER347 alloy contains niobium (columbium), which provides stabilization against carbide precipitation, maintaining strength and integrity even when exposed to high temperatures. It is widely used in industries such as petrochemical processing, food and beverage production, power generation, and marine applications. The filler metal’s composition ensures outstanding weld bead appearance, smooth arc stability, and minimal spatter, making it highly reliable for both manual and automated welding operations.

When compared with standard 304 or 308 stainless filler metals, ER347 stands out for its enhanced resistance to chromium carbide formation during welding. This makes it particularly valuable for fabrications exposed to continuous heat and corrosive elements. Metals And Welding Specialities ensures that every spool of ER347 MIG & TIG wire is precisely manufactured for consistent feedability, excellent wetting action, and clean slag removal. Whether you’re performing critical maintenance welds or large-scale fabrication, this product delivers performance you can count on.

The wire’s typical applications include joining ASTM Grade 347 stainless steels, pressure vessels, heat exchangers, exhaust manifolds, and piping systems that require long-term heat resistance. The resulting welds exhibit high tensile strength and outstanding ductility, maintaining stability even under thermal cycling. Thanks to its balanced alloying elements, ER347 provides a strong defense against oxidation and scaling up to approximately 900°C (1650°F).

For industries that demand precision, Metals And Welding Specialities offers this welding wire in a variety of diameters and packaging options to suit specific welding parameters and production requirements. Each batch undergoes rigorous testing to comply with AWS A5.9 and international quality standards, guaranteeing superior weld quality, reliability, and metallurgical integrity. When performance, safety, and efficiency matter most, trust ER347 MIG & TIG Welding Wire from Metals And Welding Specialities to deliver unmatched results in the toughest industrial environments.

• Specification ER347 MIG & TIG Welding Wire

  Classification	AWS A5.9, ER347
  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 ER347 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	SANDVIK	BOHLER	UTP
  ER347	S34780	Alloy 347	EXATON 19.9.NB/ EXATON 19.9.NBR (E347-17)	BOHLER THERMAINT H - 347	UTP A68

• ER347 MIG & TIG Welding Wire Chemical Composition

  C	Cr	Ni	Mo	Mn	Si	P	S	Cu	Element	Amount
  0.08	19.0-21.5	9.0-11.0	0.75	1.0-2.5	0.30-0.65	0.03	0.03	0.75	Nb	10XC min/1.0 max

• ER347 MIG & TIG Welding Wire Parameters

  Diameter		Process	Volt	Amps	GAS
  in	(mm)
  .035	(0.9)	GMAW	22-23	180-210	Spray Transfer 98% Argon/2% Oxygen
  .045	(1.14)	GMAW	23-25	195-260	Spray Transfer 98% Argon/2% Oxygen
  1/16”	(1.6)	GMAW	25-28	260-390	Spray Transfer 98% Argon/2% Oxygen
  1/16”	(1.6)	GTAW	14-18	90-130	100% Argon
  3/32”	(2.4)	GTAW	15-20	120-175	100% Argon
  1/8”	(3.2)	GTAW	15-20	150-220	100% Argon

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