[Hillbillysmith]

SOME cast iron will come APART with a torch, but it's a real pain. It's doesn't CUT the cast necessarily, but melts it enough that the oxygen will push it out of the way (this is not how a cutting torch works to cut regular mild steel for those who think that this IS how the torch cutting process works). Very ugly and messy as all get out. Abrasive wheels work great, but they take a while. Especially if the cast has any "meat on it's bones" LOL. I have found that some can be scored just enough with a cut-off wheel and then snapped like floor tile. It's faster but not as guaranteed as cutting it out-right.

I only have one question though, why would you want or need to cut cast?? It's called CAST iron for a reason.... Because it's casted into what ever shape or object that it needs to be. I can understand a job like Cami said, but not much more than that.