How To Weld Cast Metal. Grind off all the rust in the weld area and make sure that you have shiny bare metal. I get questions pretty regularly about welding axles to cast housingsand a lot of people assume the housing is cast iron and go to great lengths using nickel electrodes high preheat post heat etc.
Welding cast steel is like welding typical rolled steel but somewhat harder because of the demanding service conditions slightly different composition and surface impurities. Drill holes on either end of the crack to prevent it from propagating. Turn on the MIG welder and Measure your metal.
If you cant preheat the whole part try to at least warm the weld area up to 100 degrees.
One is called preheated welding and the other is called non-preheated welding. Working at 95 Amps on DCEP Direct Current Electrode Positive will. Preparing to Weld Cast Iron If Joining Two Pieces Create a 45 Bevel. Cast iron is pretty easy to cut although it is dirty so theres often a way to drill and tap a hole for a bolt or drill a hole for a pin of some sort.