ISO INTERNATIONAL STANDARD 20431 First edition 2023-07 Heat treatment Control of quality Traitementthermique-Maitrisedelaqualité Referencenumber IS0 20431:2023(E) iso @IS0 2023 IS020431:2023(E) COPYRIGHTPROTECTEDDOCUMENT IS02023 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may bereproduced orutilized otherwise in anyformorbyanymeans,electronicormechanical, including photocopying,orposting on the internet or an intranet, without prior written permission.Permission can be requested from either IsO at the address below orIso'smemberbodyinthecountryoftherequester. ISO copyrightoffice CP40i.Ch.deBlandonnet8 CH-1214 Vernier, Geneva Phone:+41227490111 Email:[email protected] Website:www.iso.org Published in Switzerland ii @IS02023-All rightsreserved

ISO 20431 2023 Heat treatment — Control of quality

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