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ALLOY 67 (ERCUNI)




Tag : ALLOY 67


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.

 

 

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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