ISO INTERNATIONAL STANDARD 18276 Second edition 2017-03 Welding consumables - Tubular cored electrodes for gas-shielded and non-gas-shielded metal arc welding of high strength steels - Classification Produits consommables pour le soudage -Fils-électrodes fourres pour le soudage a I'arc avec ou sans gaz de protection des aciers a haute reésistanceClassification Reference number IS0 18276:2017(E) ISO @IS0 2017 IS0 18276:2017(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2017, 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. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org ii @ IS0 2017 - All rights reserved IS0 18276:2017(E) Contents Page Foreword Introduction 1 Scope 1 2 Normative references. .1 3 Terms and definitions 2 4 Classification 2 5 Symbols and requirements. 3 5.1 Symbol for the product/process 5.2 Symbol for tensile properties of all-weld metal 5.3 Symbol for impact properties of all-weld metal. 5.4 Symbol for chemical composition of all-weld metal. 5.5 Symbol for type of electrode core or the usability characteristics of the electrodes. 5.6 Symbol for shielding gas. 5.7 Symbol for welding position. 5.8 Symbol for hydrogen content of deposited metal 5.9 Symbol for conditions of post-weld heat treatment 10 6 Rounding procedure. .10 7 Mechanical tests.. .10 7.1 Preheatingandinterpasstemperatures 10 7.2 Passsequence .11 7.3 Post-weld heat treatment (PWHT) condition 12 8 Chemical analysis. 9 Retesting 10 Technical delivery conditions .12 11 Examples of designations .12 AnnexA(informative)Classificationsystems. .15 Annex B (informative) Description of composition designations for electrodes in the classification system based upon tensile strength and average impact energy of 27 J18 Annex C (informative) Description of types of electrode core in the classification system 19 Annex D (informative) Descriptions of types of usability characteristics in the classification system based upon tensile strength and average impact energy of 27 J. 20 Annex E (informative) Notes on hydrogen content. 22 Bibliography 23 @ IS0 2017 - All rights reserved ili