ALLOY 67 (ERCuNi)
AWS A5.7 ERCuNi
ASME SFA 5.7 ERCuNi
67 is a copper-nickel filler metal used for MIG, TIG, oxyacetylene and submerged arc welding of wrought or cast 70/30, 80/20 and 90/10 copper-nickel to themselves or to each other. Excellent for joining copper-nickel alloys to nickel-copper Monel® 400, R-405, K-500 or high nickel alloy 200. Note: 67 can be used for overlaying on steel, however a barrier layer of 61 should be used for the first pass when MIG welding. 60 should be used for the first pass when submerged arc welding.
TYPICAL WELD METAL CHEMISTRY (%)
*Ni | 29.0-32.0 |
Mn | 1.0 max. |
Fe | 0.40-0.75 |
S | 0.01 max. |
Si | 0.25 max |
Cu | Balance |
Ti | 0.20-0.50 |
P | 0.02 max. |
Pb | 0.02 max. |
Others (total) | 0.50 max. |
*Includes Cobalt (Co)
MINIMUM MECHANICAL PROPERTIES (as welded)
Tensile strength (psi) | 50,000 |
Yield strength (0.2% offset) (psi) | 20,000 |
Elongation in (%) | 30 |
Brinell hardness (500 kg load) | 60-80 |
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