A MIG welding torch emits bright blue sparks as it welds a cracked cast iron part on a metal workbench, with a gloved hand holding the torch and a welding machine visible in the blurred background.

How to Weld Cast Iron With a MIG Welder Without Cracking It

ByWelderology Team

Welding cast iron is notoriously tricky due to its high carbon content and brittleness, but with the right preparation and technique, MIG welding can be a viable option. While TIG or stick welding are traditionally used, a MIG welder with the proper setup can repair cast iron effectively—if you follow a careful process. Why Welding…