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Anyone have any leads on sealers for M37M35 to start researching? Also what's the wall thickness on these liners, any chance of being able to throw it on a lathe and cut small o-ring grooves in it?

If you have an inclusion, you simply stop welding, reheat around the weld area, grind the inclusion out and start again, you don't want to try welding over them.

I would be willing to bet, partially judging by the price, that all these fancy names, are just brand names of typical nickel alloys or maybe a variation of somewhere between a 55% and 99% nickel? Kind of like vice grips and channel locks... If you get a nice preheat on your part nickel will...

Yes, you can actually do this with a TIG welder as well. You would typically want to use a filler metal though, in the case of cast-iron, that would be a nickel alloy. Trying to re-fuse cast without a filler rod typically doesn't work very well (cracking), you want to minimize the melting of...

I quickly skimmed that tread, my recommendation, unless your willing to use heat, pre, during, and post welding, I wouldn't waste your time trying to weld the crack. I don't know anything about Normacast rods, but have always had great success with plain old nickel 55 electrodes, but NEVER...