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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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