Hardening colours-Technical glossary-Bodycote Plc

Hardening colours

The colour of steel when it is held at its hardening temperature.

As any metal is heated it changes colour, depending on its temperature. During the early days of heat treatment, before there were reliable temperature measuring systems, the temperature from which steels had to be quenched were judged by eye.

Hardening colours

The colour of steel when it is held at its hardening temperature.

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