How To Arc Weld Cast Iron. The welding rod should be in a vertical direction. Notably cast iron is sometimes welded positive return to keep the work piece as cool as possible.
However we are discussing the most used and popular techniques for welding cast iron. Dont pre-heat cast iron beyond 760C 1400F. Work on one inch at a time and allow about 45 seconds for.
Normally when you are learning how to weld Cast Iron you would pre-heat the base metal to at.
While you can use TIG MIG or ARC we recommend ARC. You can use stick welding for effective joints and its very economical. Generally cast iron can be stick welded by preheating the material to 350F before welding and adding a slow cooldown phase in an insulating medium like sand to prevent heat cracking. This has to do with the electron flow and the control of heat.