ISO INTERNATIONAL STANDARD 6508-2 Fourth edition 2023-12 Metallic materials Rockwell hardness test - Part 2: Verification and calibration of testing machines and indenters Materiaux métalliques-EssaidedureteRockwell - Partie 2: Verification et étalonnage des machines d'essai et des pénétrateurs Referencenumber IS0 6508-2:2023(E) ISO IS02023 IS06508-2:2023(E) COPYRIGHTPROTECTEDDOCUMENT IS02023 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,or posting on the internet or an intranet, without prior written permission. Permission can be requested from either Iso at the address below orISo's memberbody in the countryoftherequester. Iso copyright office CP401:Ch.de Blandonnet8 CH-1214 Vernier, Geneva Phone:+4122 749 0111 Email: [email protected] Website:www.iso.org Published inSwitzerland ii @IS02023-All rights reserved