Specifications
AWS A5.7 ERCuSi-A,
AWS A5.27 RcuSi-A ASME SFA5.7 ASME SFA 5.27
ERCuSi-A QQ-R-571C, MIL-R-19631B Type MIL-RcuSi-A
MIL-E-23765/3 (MIL-CuSi)
Description Silicon
Bronze is a copper based filler metal containing 3%
silicon and small amounts of manganese, tin and zinc.
Primarily used for MIG, TIG and oxyacetylene welding
of copper, copper-silicon and copper-zinc base metals
to themselves and to steel. Excellent for plain or galvanized
steel sheet metal as well as other coated steels.
Silicon Bronze is also used for surfacing areas subjected
to corrosion. The oxyacetylene gas flame
should be slightly oxidizing. Keep the weld puddle small
in order to promote fast solidification and minimize
cracking. A high boric acid flux should be used both
before and during welding. Preheating is NOT recommended.
Chemical Composition
(%max., unless shown as range or min.)
|