ISO INTERNATIONAL STANDARD 4545-1 Third edition 2023-10 Metallic materials Knoop hardness test 一 Part 1: Test method Matériauxmeétalliques-Essaide duretéKnoop- Partie1:Méthoded'essai Reference number IS0 4545-1:2023(E) ISO @ ISO2023 IS0 4545-1:2023(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 anyform 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 IO at the address below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii IS02023-Allrightsreserved IS0 4545-1:2023(E) Contents Page Foreword. ..iv 1 Scope. ..1 2 Normative references 3 Terms and definitions .2 4 Symbols and designations 4.1 Symbols and designations used in this document. .2 4.2 Designationofhardnessnumber 5 Principle ..3 6 Testing machine. .3 6.1 Testing machine .3 6.2 .3 Indenter. 6.3 Diagonal measuring system .3 7 Test piece .4 7.1 Test surface ..4 7.2 Preparation .4 7.3 Thickness. .4 7.4 Support ofunstable testpieces 4 7.5 Metallic and other inorganic coatings .4 8 Procedure .5 8.1 Test temperature 5 8.2 Test force. 5 8.3 Periodicverification 5 8.4 Test piece support. 5 8.5 .5 Focus ontestsurface 8.6 Test force application. 6 8.7 Preventionoftheeffectofshockorvibration .6 8.8 Minimumdistancebetweenadjacentindentations .6 8.9 Measurement of diagonallength 8.10 Calculation of hardness value .7 9 Uncertainty oftheresults .7 10 Test report .8 Annex A (normative) Procedure for periodic checking of the testing machine, diagonal 9 measuring system and the indenter by the user ..1 AnnexB (informative)Uncertaintyofthemeasuredhardnessvalues AnnexC (informative)Knoophardnessmeasurementtraceability ..18 AnnexD (informative) CCM-Workinggroup on hardness .22 AnnexE(informative)AdjustmentofKohlerilluminationsystems. ..23 Annex F (normative) Determining the Knoop hardness of metallic and other inorganic coatings. .24 Bibliography. .28 iii IS0 2023-Allrightsreserved