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ASTM E23 Standard Test Methods for Notched Bar Impact Testing of Metallic Materials
ASTM International / 01-Jun-2007 / 28 pages ASTM E23 pdf

1.1 These test methods describe notched-bar impact testing of metallic materials by the Charpy (simple-beam) test and the Izod (cantilever-beam) test. They give the requirements for: test specimens, test procedures, test reports, test machines (see Annex A1) verifying Charpy impact machines (see Annex A2), optional test specimen configurations (see Annex A3), precracking Charpy V-notch specimens (see Annex A4), designation of test specimen orientation (see Annex A5), and determining the percent of shear fracture on the surface of broken impact specimens (see Annex A6). In addition, information is provided on the significance of notched-bar impact testing (see Appendix X2), methods of measuring the center of strike (see Appendix X2).

1.2 These test methods do not address the problems associated with impact testing at temperatures below -196 C (-320 F, 77 K).

1.3 The values stated in SI units are to be regarded as the standard. Inch-pound units are provided for information only.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 5.

Keywords: Charpy test; fracture appearance; Izod test; impact test; notched specimens; pendulum machine; ICS Number Code 77.040.10 (Mechanical testing of metals)

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