ISO INTERNATIONAL STANDARD 6507-3 Fourth edition 2018-01 MetallicmaterialsVickers hardness test - Part 3: Calibration ofreferenceblocks Materiauxmetalliques-EssaidedureteVickers- Partie3:Etalonnagedesblocsdereference Referencenumber IS0 6507-3:2018(E) IS02018 IS06507-3:2018(E) COPYRIGHTPROTECTEDDOCUMENT @IS02018 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 orbyanymeans,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 beloworIso'smemberbodyinthecountryoftherequester. ISO copyright office CP 401:Ch.de Blandonnet 8 CH-1214 Vernier, Geneva, Switzerland Tel.+4122749 0111 Fax +41 22 749 09 47 [email protected] www.iso.org Published in Switzerland ii IS02018-Allrightsreserved IS06507-3:2018(E) Contents Page Foreword .iv 1 Scope 1 2 Normativereferences 1 3 Terms and definitions .1 4 Manufactureofreferenceblocks .1 4.1 General 1 4.2 Thickness 1 4.3 Test surface area 1 4.4 Magnetism 2 4.5 Flatness and parallelism 2 4.6 Surfaceroughness 2 4.7 Preventionoftheregrind ofthetestsurface 2 5 Calibration machine 2 5.1 2 General 5.2 Direct verification 2 5.3 Traceabilityofverificationinstruments 2 5.4 Testforce 3 5.5 Indenter. .3 5.6 Diagonal measuring system 4 6 Calibration procedure. .5 7 Numberofindentations .5 8 Uniformityofhardness 6 8.1 Relativenon-uniformity .6 8.2 Uncertaintyofmeasurement .7 Marking 9 .7 .7 10 Calibration certificate 11 Validity .8 AnnexA(informative)Uncertaintyofthemeanhardnessvalueofhardnessreferenceblocks .9 AnnexB(informative)AdjustmentofKohlerilluminationsystems .14 Bibliography 15 @IS02018-All rights reserved iii