*Specification
AWS/ASME Spec 5.7
AWS Class ERCuNi
UNS C71581
*Chemical Composition,%
Mn | Si | P | Ni+Co | Fe | Cu | Pb | Ti |
≤4 | ≤0.25 | ≤0.02 | 29-32 | 0.4-0.75 | Rest | ≤0.02 | 0.2-0.5 |
*Typical Welding Parameter & Mechanical Property
Diameter | Process | Volt | Amps | Shielding Gas | |
In | mm | ||||
0.035 | 0.9 | GMAW | 26-29 | 150-190 | Spray Transfer 100% Argon |
0.045 | 1.2 | GMAW | 28-32 | 180-220 | |
1/16 | 1.6 | GMAW | 29-33 | 200-250 | |
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 |
Tensile Strength MPa(ksi) | Yield Strength MPa(ksi) | Elongation % | |
AWS requirement | 345(50) | Not specified | Not specified |
Typical results as welded | 360(53) | 140(21) | 32 |
*Feature
For welding of 70/30, 80/20 and 90/10 copper-nickel alloys.
Can be used for MIG overlay on steel after a first layer with Nickel 208.
Dissimilar welding applications include joining copper-nickel alloys to Nickel 200 or nickel-copper alloys.
*Application
Used for TIG and MIG and oxy-fuel welding of 70/30, 80/20 and 90/10 copper-nickel alloys.
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