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air-hardening
[ air-hahr-dn-ing ]
adjective
, Metallurgy.
- noting any metal, especially alloy steel, that can be hardened from above its transformation point by cooling in air.
air hardening
noun
- See oil hardeninga process of hardening high-alloy steels by heating and cooling in a current of air Compare oil hardening
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Word History and Origins
Origin of air-hardening1
First recorded in 1905–10
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Example Sentences
This alloy, because hardened simply in air, was called “air-hardening” or “self-hardening.”
From Project Gutenberg
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