self-hardening

Questions

What does self-hardening mean?

Designating, or pertaining to, any of various steels that harden when heated to above a red heat and cooled in air, usually in a blast of cold air with moderate rapidity, without quenching. Such steels are alloys of iron and carbon with manganese, tungsten and manganese, chromium, molybdenum and manganese, etc. They are chiefly used as high speed steels.

Where does self-hardening come from?

From self- + hardening.

How to pronounce self-hardening

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