How To Weld A Cast Iron. Thoroughly clean the surface to be welded grind file dress and dry. Once a good weld deposit is made the two sides of the crack can be welded together.
Unlike mig welding thin aluminum which could be easily achieved with almost any material cast iron is different. One is called preheated welding and the other is called non-preheated welding. Weld in very small points at a time not larger than 5-10 mm.
Normally when you are learning how to weld Cast Iron you would pre-heat the base metal to at.
One the deposit is made the two sides of the crack can then be welded. WelddotcomIn this episode we take a look at welding Cast Iron. 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. Welding To Repair Cast Iron The most important thing to remember when welding cast iron is to move low and slow.