ERCuNi

Description
ERCuNi is used for TIG, MIG, and oxyfuel welding of 70/30, 80/20 and 90/10 copper- nickel alloys. This filler metal can be used for MIG overlay on steel after a first layer with Nickel 208 (Filler Metal 61). Dissimilar-welding applications include joining copper-nickel alloys to Nickel 200 or nickel-copper alloys.

Applications
ERCuNi is used for TIG, MIG, and oxyfuel welding of 70/30, 80/20 and 90/10 copper- nickel alloys. This filler metal can be used for MIG overlay on steel after a first layer with Nickel 208 (Filler Metal 61). Dissimilar-welding applications include joining copper-nickel alloys to Nickel 200 or nickel-copper alloys.

Product Details
Chemical composition

Grade	Chemical composition(%)
ERCuNi	C	Mn	P	Si	S	Ni
	≤0.03	≤1.0	≤0.02	≤0.25	≤0.01	30~32
	Al	Cu	Ti	Fe	Others
	≤0.15	Bal	0.2~0.5	0.4~0.75	＜0.5

Mechanical properties

Tensile Strength	Yield Strength	Elongation
360Mpa	140Mpa	32%

Welding paramaters

Process	Diameter	Voltage	Amperage	Gas
TIG	.045”     (1.2mm)	13-16	80-110	100% Argon
	1/16”     (1.6mm)	14-18	90-130	100% Argon
	3/32”     (2.4mm)	15-20	120-175	100% Argon
	1/8”      (3.2mm)	15-20	150-220	100% Argon
MIG	.045”     (1.2mm)	28-32	180-220	75% Argon + 25% Helium
	1/16”     (1.6mm)	29-33	200-250	75% Argon + 25% Helium
SAW	3/32”     (2.4mm)	28-30	275-350	Suitable Flux may be used
	1/8”      (3.2mm)	29-32	350-450	Suitable Flux may be used
	5/32”     (4.0mm)	30-33	400-550	Suitable Flux may be used

 

Specifications
AWS A5.7, ERCuNi / ASME II, SFA-5.7, ERCuNi DIN 1733 S-CuNi30Fe UNS C71581 Werkstoff Nr. 2.0837 ISO S Cu 7158 Europe S Cu 7158 (CuNi30).