Heat Treating of Irons and Steels
Temper Colors for Steels
Steel, heated in contact with air at temperatures in the tempering range, takes on various temper colors due to the formation of a thin oxide film. This article provides detailed information on temper colors for plain carbon steel, especially on the effects of time and temperature.
Temper Colors for Steels, Heat Treating of Irons and Steels, Vol 4D, ASM Handbook, Edited By Jon L. Dossett, George E. Totten, ASM International, 2014, p 550–551, https://doi.org/10.31399/asm.hb.v04d.a0005997
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