adjective Metallurgy.

noting any metal, especially alloy steel, that can be hardened from above its transformation point by cooling in air.

Nearby words

  1. air-core,
  2. air-cushion vehicle,
  3. air-dry,
  4. air-entrained concrete,
  5. air-express,
  6. air-intake,
  7. air-lance,
  8. air-launched cruise missile,
  9. air-lift pump,
  10. air-line

Origin of air-hardening

First recorded in 1905–10 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for air-hardening

  • This alloy, because hardened simply in air, was called “air-hardening” or “self-hardening.”

    Inventors at Work|George Iles