ISO INTERNATIONAL STANDARD 4545-4 Second edition 2017-12 Metallic materials Knoop hardness test - Part 4: Table of hardness values Materiaux métalliques - Essai de durete Knoop Partie 4: Tableau des valeurs de dureté Reference number IS0 4545-4:2017(E) ISO @IS0 2017 IS0 4545-4:2017(E) Contents Page Foreword .iv 1 Scope.. 2 Normative references. 3 Terms and definitions. 1 4 Table of Knoop hardness values. @ IS0 2017 - All rights reserved ili IS04545-4:2017(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. Iso collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the Iso/Ec Directives, Part 1. In particular the different approval criteria needed for the different types of Iso documents should be noted. This document was drafted in accordance with the editorial rules of the ISo/IEc Directives, Part 2 (see Wwwiso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. Iso shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISo list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the voluntary nature of standards, the meaning of Iso specific terms and expressions related to conformity assessment, as well as information about Iso's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL; Wwwwiso.org/iso/foreword.html. This document was prepared by Technical Committee IsO/TC 164, Mechanical testing of metals, Subcommittee SC 3, Hardness testing. This second edition cancels and replaces the first edition (IS0 4545-4:2005), which has been technically revised. The main changes compared to the previous edition are as follows: in Table 1, the data for indentations using forces 0,009 807 N (HK 0,001), 0,019 61 N (HK 0,002), 0,049 03 N (HK 0,005) and 19,613 N (HK 2) have been added; the calculation clause has been removed. Alist of all parts in the IS04545series canbe found on theIS0 website. iv @ IS0 2017 - All rights reserved