Designation: E23-18 Standard Test Methods for Notched Bar Impact Testing of Metallic Materials1
1. Scope=
1.1 These test methods describe notched-bar impact testingof metallic materials by the Charpy (simple-beam) test and theIzod (cantilever-beam) test.They give the requirements for:tcst specimens,test procedures,test reports,test machines (secAnnex Al ) verifying Charpy impact machines (see Annex A2),optional test specimen configurations (see Annex A3).desig-
nation of test specimen orientation (see Terminology E1823).and determining the shear fracture appearance (seeAnnex A4).
Inaddition. information is provided on the significance ofnolched-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 associ-ated with impact testing at temperatures below -196 C(77 K).
1.3 The values stated in sl units are to be regarded asstandard. No other units of measurement are included in this
standard.
1.3.1Erceprion—Section 9 and Annex A4 provide inch-pound units for information only.
l.4 7his stadard does nor purport to address all of theseafety conceras.if any. associated wirh irs sse. I is there sponsibility of the ueser of this srandard to establisw appro-pricte sefery.healrha. and erivironntevutal practices and deter-ersiore he applicabilisy of regselatory liritcatios prior to 8se.Specific precautionary statements are given in Section 6.
1.5 This internarional standard was developed in accor-dance wirh internctionally recognized principles ov siandard-ization established in the Decisiow on Principles for theDevelopmenr of initernational Srandardds，Guides and Recow-mendetiows isseed by the World Trade Organization TechnicalBarriers ro Trade(TBT) Counissee.
E23-18 Standard Test Methods for Notched Bar Impact Testing of Metallic Materials
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