Our store hours may be impacted by Labor Day on Monday, September 1st. Please contact your local store to confirm.

Hardening a ferrous alloy by austenitizing and then cooling rapidly enough so that some or all of the austenite transforms to martensite. The austenitizing temperature for hypoeutectoid steels is usually above Ac3 and for hypereutectoid steels usually between Ac1 and Accm.

  • Stay up to date

    Subscribe to our monthly e-newsletter and other updates from Metal Supermarkets.

Shopping from the UK?

Visit our UK website for our stores, online ordering and product availability.