I would like to know if anybody has any idea what alloy T20 drums are made of. I know there made of cast steel that is heat hardening. I have installed sleeves on a pair with parts of a old drum. Both had one edge worn off about 1/4"+. Sleeve are pressed on but I want to tack weld at outer edge to secure them. Undecided as to TIG or MIG them. Will probably do 6 short welds as to not create a lot of heat. Input greatly appreciated.
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