Could someone tell me in plain english what QT, AR and T-100 plate are, what they're comparable to and what uses a blacksmith might have for them ? I know they stand for qenched and tempered, and abrasion resistant, I know that all three can be horrible to drill through or machine, and that I couldn't get QT-100 to harden worth a darn.

Thanks in advance,

Drq.

http://www.google.co...ZDsXtyE4uUFMjYQ

This is a pdf file. Google searching "<material> specifications" often returns useful information.

This may help. It is a specification based material, so the chemistry is not fixed.

Phil

Thanks ! I was trying to find something like this online and wasn't having much luck.