Silicon Bronze Tig Welding Sheet Metal

We often casually refer to tig brazing with silicon bronze as tig welding.

Silicon bronze tig welding sheet metal.

Silicon bronze is best known for welding plain or galvanized steel sheet metal in the manufacturing of steel cabinets metal furniture and ductwork. But just to be technically correct i will use the term tig brazing for this article. While er70s 2 filler metal is a common choice for steel another popular option for welding sheet metal is silicon bronze. How to weld auto body sheet metal with a tig welder the best two electrodes for welding auto body sheet metal is either ceriated tungsten or thoriated tungsten.

Since steels melt at a much higher temperature usually 2500f or higher using silicon bronze for joining steel with the tig process is called tig brazing and not welding. Silicon bronze is a copper alloy rod containing 3 silicon and used for tig or oxyacetylene welding of copper brass bronze steel and cast iron. While the melting point of steel is around 2700 f. Tig welding with silicon bronze is technically tig brazing because usually the base metal being welded brazed has a much higher melting point than silicon bronze filler rod.

The melting point of silicon bronze tig rod is between 1800 and 1990 f. The silicon bronze rod s lower melting point makes it ideal for joining together thin sheet metal galvanized steel and nuts and bolts too. It s also important to select a filler metal that is thinner than the base metal or as close as possible.