I broke a cast iron collar (About 1/4" thick) by turning the bolt too tight.

Can it be welded? I have a 230 Volt Mig welder that can produce up to 120 Amps of current, and I have .030" flux core wire for welding steel.

I've never tried to weld cast iron before, and I don't have any scraps to practice on. I don't even know if cast iron can be welded.

Any advice? Thanks!!