Welding Cast Iron To Stainless Steel. Another reason for using AC to tig weld cast iron is that less penetration and therefore less dilution of the cast iron base metal occurs. However there are a few things you want to remember when welding cast iron to steel.
I suggest you to use a nickel base alloy filler. Getting the welding rod of steel core means you got the cheaper one. However there are basically two approaches by which you can weld cast iron.
First usually you are doing a repair job or a retrofit if you are asking about welding cast iron to steel so be sure to check the parts thoroughly to ensure there are no stress cracks or other signs of damage.
MIG welder is highly possible for welding cast iron. You can weld cast iron with some stainless steel rods but there is no advantage. The best choice for MIG wire is specialty nickel wire but the most costly option is to use stainless steel MIG wire. In this guide Ill go over some ways that you can successfully pull this off depending on your application.