ISO INTERNATIONAL STANDARD 4969 Secondedition 2015-08-15 Steel Etching method for macroscopic examination Acier - Méthode d'attaque pour examen macroscopique Reference number IS0 4969:2015(E) ISO @IS02015 IS0 4969:2015(E) Contents Page Foreword .iv 1 Scope. .1 2 Principle .1 3 Sampling. 1 4 Preparation. .2 5 Solutions .2 6 Procedure .3 7 Preservation of test pieces. .5 8 Test report .6 Bibliography .9 @ IS0 2015 - All rights reserved iii IS0 4969:2015(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 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/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 aboutIsO'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 (other than mechanical tests and chemical analysis). This second edition cancels and replaces the first edition (Is0 4969:1980), which has been technically revised. iv @ IS0 2015 - All rights reserved