ISO INTERNATIONAL STANDARD 9443 Second edition 2018-05 Surface quality classes for hot-rolled bars and wire rod Classes de qualité de surface des barres et fils-machine laminés a chaud Reference number IS0 9443:2018(E) [so @ IS0 2018 IS0 9443:2018(E) Contents Page Foreword iv 1 Scope. 2 Normative references. 1 3 Terms and definitions . 4 Ordering and designation 4.1 Ordering... 4.2 Designation 5 Requirements 6 Testing 6.1 General 6.2 Test methods 6.2.1 General 6.2.2 Methods for the detection of discontinuitie 6.2.3 Methods for measuring the depth of discontinuities 6.2.4 Production tests on trial batches. 7 Repairs Annex A (informative) Guideline for applying surface quality classes Bibliography @ IS0 2018 - All rights reserved iii IS0 9443:2018(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 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: wwwiso.org/iso/foreword.html. This document was prepared by Technical Committee IsO/TC 17, Steel, Subcommittee SC 4, Heat treatable and alloy steels. This second edition cancels and replaces the first edition (Is0 9443:1991), which has been technically revised. The following changes have been made in comparison with the first edition: - the surface quality classes 5 to 12 (12A) have been removed; the surface classes 1 to 4 have been kept and renamed A, B, D and E and an additional surface quality class has been introduced as surface quality class C; the difference between shallow and sharp discontinuities has been removed due tothe impracticality to differentiate between the two; the admissible portion of defective material za and zb has been removed and only z has been kept. iv @ IS0 2018 - All rights reserved