ER90S-B3 MIG & TIG Welding Wire

The ER90S-B3 MIG & TIG Welding Wire from Metals And Welding Specialities is a premium low-alloy filler metal engineered for exceptional performance in critical high-temperature applications. Designed to meet demanding industrial standards, this wire delivers outstanding weld integrity, strength, and resistance to creep and oxidation. Manufactured to the highest quality specifications, it meets UNS K90941 and conforms to ASTM A5.28 ER90S-B3 standards, ensuring reliability and consistency across every weld.

This ER90S-B3 welding wire is specifically formulated for joining materials such as 2.25% Cr – 1% Mo steels, which are widely used in pressure vessels, power generation systems, refineries, and petrochemical plants. Its controlled chemistry provides excellent resistance to hydrogen-induced cracking and delivers a fine, clean weld bead with superior mechanical properties. Whether used in MIG (GMAW) or TIG (GTAW) applications, the wire ensures deep penetration, stable arc performance, and minimal spatter, resulting in reduced post-weld cleanup and higher productivity.

The wire’s balanced alloy composition makes it ideal for fabrication and repair of components operating in temperatures up to 600°C (1110°F). Typical applications include boiler tubes, headers, steam piping, and other components exposed to high-pressure and high-temperature service. With precise deoxidizers such as silicon and manganese, ER90S-B3 offers smooth metal transfer and low porosity, ensuring a clean, defect-free weld even under challenging conditions.

At Metals And Welding Specialities, every spool of ER90S-B3 MIG & TIG wire undergoes strict quality testing to ensure conformity with international welding standards. The result is a dependable product that offers excellent tensile strength, toughness, and creep resistance — qualities essential for the long-term performance of critical weldments in demanding environments. The wire’s smooth feedability also allows consistent performance in both automated and manual welding operations, providing professionals with a versatile and dependable filler metal they can trust.

By maintaining precise metallurgical control and exceptional surface finish, Metals And Welding Specialities ER90S-B3 wire ensures superior arc stability and consistent weld bead appearance. Its compatibility with argon or argon/CO₂ shielding gases enhances weld quality and protects against atmospheric contamination. Whether you’re fabricating new components or performing maintenance on high-temperature systems, this wire delivers the durability, reliability, and weld quality you expect from an industry leader in welding consumables.

Trust Metals And Welding Specialities to supply ER90S-B3 MIG & TIG Welding Wire wire that meets the highest performance and safety standards, ensuring your operations maintain peak efficiency and reliability.

• Specification ER90S-B3 MIG & TIG Welding Wire

  Classification	AWS A5.28, ER90S-B3
  Form	MIG spools, TIG cut lengths, Reels and Coils
  Type Of Welding	Inert Gas Welding
  Standard TIG straight lengths are available	36” (914 mm) or 39” (1000 mm) lengths. Other lengths available upon request.
  AWS ER90S-B3 MIG & TIG Filler Metal Application & uses	Hardware tools Metallurgy Machinery Construction Shipbuilding Petroleum Chemical plant Power sector Gas Industry

• Equivalent Grade Of ER90S-B3 MIG & TIG Welding Wire

  Class	UNS	Oxford Alloys	BOHLER
  ER90S-B3	K30960	Alloy 90S-B3	UNION ER90S-B3

• ER90S-B3 MIG & TIG Welding Wire Chemical Composition

  C	Mn	Si	Cr	Mo	S	P	Ni	Cu	OET
  0.10 max	0.40- 0.70	0.50 max	8.00- 10.5	0.8- 1.2	0.025 max	0.025 max	0.5 max	0.35 max	0.50 max

• ER90S-B3 MIG & TIG Welding Wire Parameters

  PROCESS	DIA. OF WIRE	AMPERAGE	VOLTAGE	GAS/FLUX
  GTAW (TIG)	1/16” 3/32”	50-120 120-200	7-13 10-16	Ar Ar
  	1/8”	150-220	12-18	Ar
  GMAW (MIG) SHORT ARC	.035” .045” 1/16”	90-160 120-200 -	14-20 16-20 -	Co2 CO2 or 75 Ar/25 CO2 CO2 or 75 Ar/25 CO2
  GMAW (MIG) SPRAY TRANSFER	.035” .045” 1/16”	180-230 250-350 280-400	25-28 25-30 26-36	98 Ar/2 O2 75 Ar/25 CO2 75 Ar/25 CO2
  SUBMERGED	3/32”	250-400	28-32	UV420TTR
  ARC	1/8”	400-600	30-34	UV420TTR

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