Conforms to Certification: AWS A5.7 | ASME SFA A5.7
Weld Process: GMAW, ASAW and Oxy-Fuel Welding Processes
|AWS Chemical Composition Requirements|
|Cu = Remainder||Mn = 1.0 max|
|Fe = 0.40 – 0.75||Si = 0.25 max|
|Ni = 29.0 = 32.0||P = 0.02|
|Pb = 0.02||Ti = 0.20 – 0.50|
|Other = 0.50 max|
|Diameter X Spool Sizes||Diameter X Coil Sizes|
|.035 x 33#||1/16 x COIL|
|.045 x 33#||3/32 x COIL|
|1/16 x 33#||1/8 x COIL|
|5/32 x COIL|
ERCuNi (NA67) is used for gas metal and gas tungsten arc welding. Can also be used by oxy-fuel welding of 70/30, 80/20, and 90/10 copper nickel alloys. A barrier layer of nickel alloy 610 is recommended prior to overlaying steel with GMAW weld process.
|Deposited Chemical Composition % (Typical)|
|Ni = 31.0||Mn = 0.75||P = 0.006|
|Cu = Balance||Si = 0.10||Ti = 0.35|
|Fe = 0.55|
|Deposited All Weld Metal Properties % (AW)|
|Tensile Strength||54,000 psi|
|Yield Strength||21,500 psi|
Deposited Charpy-V-Notch Impact Properties %
Recommended Welding Parameters for MIG and SAW Welding of Nickel Alloys
|Process||Diameter of Wire||Voltage (V)||Amperage (A)||Gas|
|MIG||.035 inches||26 – 29||150 – 190||75 % Argon +25% Helium|
|.045 inches||28 – 32||180 – 220||75 % Argon +25% Helium|
|1/16 inches||29 – 33||200 – 250||75 % Argon +25% Helium|
|SAW||3/32 inches||28 – 30||270 – 350||Suitable Flux May Be Used.|
|1/8 inches||29 – 32||350 – 450||Suitable Flux May Be Used.|
|5/32 inches||30 – 33||400 – 550||Suitable Flux May Be Used.|
Note: Other shielding Gases may be used for Mig welding. Shielding gases are chosen taking Quality, cost, and Operability into consideration.
Note: Both agglomerated and fused fluxes can be used for submerged arc welding.
Note: The chemical composition of the flux mainly affects the chemistry of the weld metal and consequently its corrosion resistance and mechanical properties.