ERCuSi-A

Class: ERCuSi-A
AWS: A5.7

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

Silicon Bronze: Tig Welding Process (GTAW)

AWS Chemical Composition Requirements
Cu = Remainder Zn = 1.0 max
Sn = 1.0 max Mn = 1.5 max
Fe = 0.50 max Si = 2.8 – 4.0
Al = 0.01 max Pb = 0.02 max
Other = 0.50 max

Available Sizes
.035 x 36
.045 x 36
1/16 x 36
3/32 x 36
1/8 x 36
3/16 x 36
5/32 x 36

Application
Use for welding of Silicon Bronze Copper, or Aluminum Bronze of low aluminum content. It can also be used for brazing malleable iron and light gauge steel.

Deposited Chemical Composition % (Typical)
Dependent on weld process

(Nominal) All Weld Metal Properties Requirements
Tensile Strength                                          50,000psi

Recommended Welding Parameters

Process Diameter of Wire Voltage (V) Amperage (A) Gas Feed
TIG 1/16 inches x 36 –0– 70-120 100% Helium or 100% Argon 40-55 CFH
GTAW 3/32 inches x 36 –0– 120-160 100% Helium or 100% Argon 40-55 CFH
1/8 inches x 36 –0– 170-230 100% Helium or 100% Argon 40-55 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.