ASTM E23 - 12c

    Standard Test Methods for Notched Bar Impact Testing of Metallic Materials

    Active Standard ASTM E23 | Developed by Subcommittee: E28.07

    Book of Standards Volume: 03.01


      Format Pages Price  
    PDF Version 25 $60.00   ADD TO CART
    Print Version 25 $60.00   ADD TO CART
    Standard + Redline PDF Bundle 50 $72.00   ADD TO CART


    Significance and Use

    These test methods of impact testing relate specifically to the behavior of metal when subjected to a single application of a force resulting in multi-axial stresses associated with a notch, coupled with high rates of loading and in some cases with high or low temperatures. For some materials and temperatures the results of impact tests on notched specimens, when correlated with service experience, have been found to predict the likelihood of brittle fracture accurately. Further information on significance appears in Appendix X1.

    1. Scope

    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), designation of test specimen orientation (see Terminology E1823), and determining the percent of shear fracture on the surface of broken impact specimens (see Annex A4). In addition, information is provided on the significance of notched-bar impact testing (see Appendix X1), and 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 (77 K).

    1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.3.1 ExceptionSection 8 and Annex A4 provide inch-pound units for information only.

    1.4 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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    B925 Practices for Production and Preparation of Powder Metallurgy (PM) Test Specimens

    E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

    E604 Test Method for Dynamic Tear Testing of Metallic Materials

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    E1823 Terminology Relating to Fatigue and Fracture Testing

    E2298 Test Method for Instrumented Impact Testing of Metallic Materials


    ICS Code

    ICS Number Code 77.040.10 (Mechanical testing of metals)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/E0023-12C

    ASTM International is a member of CrossRef.

    ASTM E23

    Citing ASTM Standards
    Back to Top