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.