Metal Science and Heat Treatment of Metals

, Volume 1, Issue 8, pp 45–46 | Cite as

Low-temperature tempering of carburized and hardened steel 30KhGT

  • V. V. Babayan
Metal Science and Heat Treatment


  1. 1.

    The optimum tempering conditions of steel 30KhGT are 180°–200° C for 90 minutes' holding.

  2. 2.

    The impact toughness of such steel case-hardened to a 1.1–1.2 mm depth by carburizing and tempered at 120°–150° C/90 min. is by 20%–40% less than that obtained for the optimum tempering conditions.

  3. 3.

    The same steel, when carburized and quenched but not tempered, shows impact toughness values 50% less than after the best tempering procedure.



Tempering Condition Impact Toughness Optimum Tempering Tempering Procedure Good Tempering 

Copyright information

© Acta Metallurgica 1961

Authors and Affiliations

  • V. V. Babayan
    • 1
  1. 1.Nati

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