ERCuNi MIG & TIG Welding Wire

Metals And Welding Specialities offers high-performance ERCuNi MIG & TIG Welding Wire welding wires engineered for precision, durability, and superior weld quality. This copper-nickel alloy wire, known for its excellent corrosion resistance, is widely used in marine, chemical, and offshore applications. Manufactured under strict quality standards, it meets the requirements of UNS C70600, ASTM B151, and conforms to the AWS A5.7 ERCuNi classification, ensuring reliability and consistency for critical welding operations.

The ERCuNi wire from Metals And Welding Specialities is designed to weld 70/30 copper-nickel alloys, as well as joints between copper-nickel and nickel-copper alloys. Its unique composition delivers outstanding resistance to seawater, brine, and acidic environments. This makes it the preferred filler metal in shipbuilding, desalination plants, and heat exchanger fabrication. The wire ensures high mechanical strength and stable arc characteristics, resulting in smooth, clean welds with minimal spatter and porosity.

Our ERCuNi MIG & TIG Welding Wire wire is suitable for both MIG (GMAW) and TIG (GTAW) welding processes. The filler metal contains approximately 70% copper and 30% nickel, offering excellent resistance to stress-corrosion cracking and erosion in turbulent seawater. Welds made with this alloy maintain their integrity even under high-pressure and high-temperature conditions, ensuring long-term performance in challenging industrial environments.

Metals And Welding Specialities’ advanced production technology guarantees uniform wire diameter, consistent chemical composition, and superior feedability, making it ideal for automated and manual welding systems. The wire’s excellent thermal conductivity and metallurgical compatibility with base metals enhance productivity and reduce post-weld finishing time. Whether used in piping systems, condenser tubing, or marine structures, ERCuNi delivers exceptional joint strength and corrosion resistance that meet global standards.

Our customers trust Metals And Welding Specialities for welding consumables that combine precision engineering with proven metallurgical performance. The AWS Class ERCuNi wire exemplifies our commitment to delivering materials that support efficient fabrication, long service life, and consistent weld quality across demanding applications. With every batch manufactured under ISO-certified facilities, you can rely on our expertise for your next project involving copper-nickel alloys.

• Specification AWS Class ERCuNi Coated Electrodes

  Classification	A5.7 ERCuNi
  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.
  ERCuNi MIG & TIG Welding Wire Filler Metal Application & uses	Hardware tools Metallurgy Machinery Construction Shipbuilding Petroleum Chemical plant Power sector Gas Industry

• AWS Class ERCuNi Coated Electrodes Chemical Composition

  Cu	Remainder
  Mn	1.0 max
  Fe	0.40 – 0.75
  Si	0.25 max
  Ni	29.0 – 32.0
  P	0.02
  Pb	0.02
  Ti	0.20 – 0.50
  Other	0.50 max

• AWS Class ERCuNi Coated Electrodes Parameters

  Diameter		Process	Volt	Amps (flat)	Amps (V/OH)
  in	(mm)
  .035	(0.9)	GMAW	26-29	150-190	Spray Transfer 100% Argon
  .045	(1.2)	GMAW	28-32	180-220	Spray Transfer 100% Argon
  1/16	(1.6)	GMAW	29-33	200-250	Spray Transfer 100% Argon
  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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