BS ISO 16574:2015 INTERNATIONAL ISO STANDARD 16574 First edition 2015-09-15 Determination of percentage of resolvable pearlite in high carbon steel wire rod Détermination du pourcentage de perlite résoluble dans les fils machine en acier a haut carbone Reference number ISO 16574:2015(E) TSO @IS02015 BS ISO 16574:2015 IS0 16574:2015(E) Contents Page Foreword .iv Introduction .. 1 Scope. .1 2 Normative references 1 3 Terms and definitions 1 4 Symbols and abbreviated terms .1 5 Principle .2 6 Selection and preparation of samples .2 6.1 Testlocation 2 6.2 Grinding and polishing 2 6.3 Etching .2 7 Evaluation of the percentage of resolvablepearlite .3 7.1 Parameters of optical microscope 3 7.2 Determination of measuring field of view 3 7.2.1 Determination of measuring locations .3 7.3 Measuring methods 4 7.3.1 Manualpointcountmethod .4 7.3.2 Automatic image analysis method 4 7.4 Reporting of results .4 Bibliography 5 IS02015-Allrightsreserved iii BS ISO 16574:2015 IS0 16574:2015(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 throughIsotechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnical committee has been established has the right to be represented on that committee. International 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/IEC 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 www.iso.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 constituteanendorsement. For an explanation on the meaning of Iso specific terms and expressions related to conformity assessment, as well as information about ISO's adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 7, Methods of testing (otherthan mechanical tests and chemical analysis). iv @ IS0 2015 - All rights reserved