Silicon Bronze (ERCuSi-A) is primarily used for
MIG, TIG, and gas welding of copper, copper-
silicon and copper-zinc base metals to
themselves and to steel. It is an excellent
choice for joining plain or galvanized sheet
steel metal as well as other coated steels.
Applications
• Surfacing areas subject to erosion
• Joining copper, copper-silicon, and copperzincs
to themselves or steel.
AWS Specification
AWS A5.7/A5.7M: 2007
AWS Classification ERCuSi-A
Welding Current
AC - DCEP
Typical Wire Chemistry
Zn 1.0
Sn 1.0
Mn 1.5
Fe 0.50
Si 2.8 - 4.0
Al 0.01
Pb 0.02
Cu (including Ag) REM
OTHER 0.50
Typical Mechanical Properties
(As Welded)
Melting Point 1866ºF
Tensile Strength, ksi 50
Elongation%, min 65
Available Diameters MIG with
Operating Range in Amps
.023" 100 - 140
.030" 130 - 150
.035" 145 - 185
.045" 195 - 215
1/16" 260 - 280
Available Diameters TIG/Oxy Rod
with Operating Range in Amps
1/16" 70 - 150
3/32" 150 - 200
1/8" 230 - 400