- noting or pertaining to any of various steels that harden after heating without quenching or other treatment.
Origin of self-hardening
First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for self-hardening
This alloy, because hardened simply in air, was called “air-hardening” or “self-hardening.”Inventors at Work