temper color

American

noun

Metallurgy.

any of the colors appearing on the surface of clean, unoxidized steel heated in air, from pale yellow at the coolest to dark blue at the hottest: used as an approximate indication of temperature.

Example Sentences

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If there is a distinct boundary line of temper color between the hard cutting edge and softer shank portion, it will be very apt to break at or near that line.

From Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023