ISO INTERNATIONAL STANDARD 148-1 Third edition 2016-10-15 Metallic materials - Charpy pendulum impact test - Part 1: Test method Materiaux metalliques-Essai deflexion par choc suréprouvette Charpy- Partie 1: Méthode d'essai Reference number IS0 148-1:2016(E) ISO @IS02016 IS0 148-1:2016(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form writtenpermission.PermissioncanberequestedfromeitherIsoattheaddressbeloworIso'smemberbodyinthecountryof the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel.+4122 7490111 Fax +4122 749 09 47 [email protected] www.iso.org ii @ IS0 2016 - All rights reserved IS0 148-1:2016(E) Contents Page Foreword ..iv 1 Scope 2 Normativereferences 3 Terms and definitions 3.1 Definitions pertaining to energy .1 3.2 Definitions pertaining to test piece ..2 4 Symbols and abbreviated terms 5 Principles of the test .3 6 Test pieces. .3 6.1 General. .3 6.2 Notch geometry .4 6.2.1 V-notch .4 6.2.2 U-notch 6.3 Tolerance of the test pieces 4 6.4 Preparationofthetestpieces. 6.5 Marking of the test pieces. .4 7 Test equipment. .4 7.1 General .4 7.2 Installation andverification 5 7.3 Striker. .5 8 Test procedure. ..5 8.1 General .5 8.2 Friction measurement .5 8.3 Test temperature. 6 8.4 Specimen transfer. .7 8.5 Exceeding machine capacity 7 8.6 Incompletefracture .7 8.7 Test piece jamming .8 8.8 Post-fracture inspection. .8 9 Test report .8 9.1 Mandatory information ..8 9.2 Optionalinformation ..8 Annex A (informative) Self-centring tongs ..12 AnnexB (informative)Lateralexpansion. ..13 AnnexC (informative) Fractureappearance .16 Annex D (informative) Absorbed energy vs. temperature curve and the transition temperature...19 Annex E (informative) Measurement uncertainty ofan absorbed energy value, K. ..21 Bibliography ..29 IS0 2016 - All rights reserved iii