How To Weld Cast Iron With Mig. I vary location with each bead with immediate peaning. MIG nickel wire is expensive but can be used with 80 Argon 20 Carbon Dioxide gas.
Weld in very small points at a time not larger than 5-10 mm. The thermal contraction is the thing that affects the tensile strength of cast iron. Mig Welding Cast Iron using standard mig wire.
The answer is yes but not recommended.
Cast irons become brittle if its welded using wire feed MIG process. Weld in very small points at a time not larger than 5-10 mm. At a time work about an inch and wait for at least 45 seconds between two segments. With a MIG welder and the right wire you can get cast iron metals welded.