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air-hardening

[air-hahr-dn-ing] /ˈɛərˌhɑr dn ɪŋ/
adjective, Metallurgy.
1.
noting any metal, especially alloy steel, that can be hardened from above its transformation point by cooling in air.
Origin of air-hardening
1905-1910
First recorded in 1905-10
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for air-hardening
Historical Examples
  • This alloy, because hardened simply in air, was called “air-hardening” or “self-hardening.”

    Inventors at Work George Iles

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