Silicon Bronze is a copper based filler metal primarily used for MIG, TIG and oxyacetylene welding of copper, copper-silicon and copper-zinc base metals to themselves and to steel. Silicon bronze can be used on plain or galvanized steel sheet metal. It can also be used for surfacing areas subjected to corrosion.

Used for brazing, the low melting points makes this filler rod perfect for joining thin sheet metal or galvanized steel; you can even braze dissimilar metals like copper to steel, which is very popular for artwork and sculptures. In fact you can join steel, copper, bronze, cast iron or brass using a silicon bronze rod while brazing with your TIG.

Brazing with a TIG is usually done with DC polarity but can also be welded with AC. If you want to braze metals and thought you were going to have to also buy an expensive gas torch set up, using this rod allows you to use your TIG machine and get incredible results.

How To Select Filler Rod

The thickness of the metal being welded will determine the diameter of the rod.

045” diameter filler rod for thin sheet metal

Match the alloy you’ll be welding to the filler rod. Here are some common applications:

ER70S-2 – Mild steel and 4130 chrome moly tubing

It’s usually a great idea to have a tube of a few kinds available because you never know what kinds of projects you’re going to run into. Plus our filler rods come in convenient tubes that allow you to easily open and close to keep your filler rods clean and free of contaminants.