, Volume 17, Issue 5, pp 529–531 | Cite as

A Comparison of Charpy and Izod Impact Testing in Acid Open Hearth Steels

  • R. W. Hogue
48th National Open Hearth and Basic Oxygen Steel Conference


Charpy and Izod V-notch specimens of three low alloy steel casting grades were tested as a function of temperature. For any given set of conditions of testing temperature and composition, the Izod impact values were consistently higher. The transition temperature, as measured by various criteria, was considerably lower for Izod than for Charpy when relatively tough materials were tested. In brittle materials the Izod and Charpy transition temperatures are both quite high. Depending on the method of determination, the Izod transition temperature can be either higher or lower than the Charpy transition temperature.


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    ASTM Standards, 1961, p. 85.Google Scholar
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    W. Spath: Impact Testing of Materials, p. 20, Gordon and Breach, New York, 1961.Google Scholar
  4. 4.
    Armstrong, Kahn, and Thielock: Transition from Ductile to Brittle Behavior in Pressure Vessel Steels, Welding Research Supplement, August 1952.Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 1965

Authors and Affiliations

  • R. W. Hogue
    • 1
  1. 1.United Engineering & Foundry Co.VandergriftUSA

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