Silicon Bronze - Solid Wire
ERCuSi-A silicon bronze MIG wire is a copper-silicon filler (AWS A5.7) built for MIG brazing — a low-heat-input process that joins thin and coated steel with minimal distortion and burn-through. It's ideal for galvanized and zinc-coated sheet, dissimilar metals, copper, auto-body panels, and artwork. Spooled in .030" and .035", run under argon on DC+.
Specifications & FAQ — click to expand
| AWS Classification | AWS A5.7 ERCuSi-A |
| Alloy | Copper-silicon (silicon bronze) |
| Shielding Gas / Polarity | Argon · DC+ (DCEP) |
| Best For | MIG brazing galvanized/coated steel, thin sheet, copper, art |
Frequently Asked Questions
What is MIG brazing with silicon bronze?
It uses silicon bronze filler at a lower temperature than steel welding, so the base metal barely melts. That means less distortion, less burn-through on thin sheet, and no damage to zinc coatings on galvanized steel.
Where is ERCuSi-A commonly used?
Auto-body and sheet-metal repair, galvanized and dissimilar-metal joints, copper work, and sculpture/art welding.
