ERCu

Class: ERCu
AWS: A5.7

Conforms to Certification: AWS – 5.7 | ASME SFA A5.7

Copper: Mig Welding Process (GMAW)

AWS Chemical Requirements
Cu + Ag = 98.0 min Sn = 1.0 max
Mn = 0.50 max Si = 0.50 max
P = 0.15 max Al = 0.01 max
Pb = 0.02 max Other = 0.50 max
Available Sizes 
Diameter X Spool Sizes Diameter X Coil Sizes
.035 x 30# 1/16 x 60#
.045 x 30# 3/32 x 60#
1/16 x 30# 1/8 x 60#

Application
This weld material is used to fabricate deoxidized copper and repair weld copper castings. Both the gas metal arc and gas tungsten arc weld processes can be used. Can also be used to weld galvanized steel and deoxidized copper to weld steel where high strength joints are not required.

Deposited Chemical Composition % (Typical)
Dependent on weld process

(Nominal) All Weld Metal Properties
Tensile Strength 8,000 psi
Yield Strength 29,000 psi
Elongation 29%
Reduction of Area 45%

 

Recommended Welding Parameters

Process Diameter of Wire Voltage (V) Amperage (A) Gas Feed
MIG .035 inches 20-26 100-200 100% Argon or 75% Argon, 25% Helium 45-55 CFH
GMAW (DCEP) .045 inches 22-28 100-200 100% Argon or 75% Argon, 25% Helium 45-55 CFH
1/16 inches 29-32 250-400 100% Argon or 75% Argon, 25% Helium 45-55 CFH
3/32 inches 32-34 350-500 100% Argon or 75% Argon, 25% Helium 45-55 CFH

Preheat / Interpass Recommendations
Preheating copper – base alloys is frequently unnecessary provided section thicknesses are not unusually heavy.
Preheat and Interpass temperatures will vary depending on section thickness, selected weld process and other variables.