Silicon bronze filler metal is a copper-base alloy containing approximately 3% silicon. It is used for gas tungsten and gas metal arc welding of copper-silicon and copper-zinc alloys (brass) and for welding steel to itself or to these alloys.
| Standard | Alloy | Chemical Composition(%) | Solidus | Liquidus | Application |
| AWS A5.7 | ERCuSi-A CuSi3Mn1 | Cu:Balance Ni:≤0.05 Si:2.8-4.0 Zn:≤1.0 Al:0.01 Fe:≤0.5 Mn:0.5-1.5 Other:≤0.5 | 910℃ | 1025℃ | Best for joining and overlay welding of Cu-Zn alloy, especially for the MIG welding of zinc coated steel sheet.Pre-heat suggested when MIG overlay welding for large size products and use pulsed arc welding while overlay the steel. |
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