martempering means an act or process by which one martempers a piece of steel. Lexicurio rates it Sui generis — a strength score of 90 out of 100.
Etymology
From martemper + -ing; more at martemper.
noun
- An act or process by which one martempers a piece of steel.“Atwood Vacuum Machine Co.'s experience with modified martemperings has been very satisfactory. It has now been adopted as standard procedure for most all of the oil hardening […]”