1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Surface quality classes for hot-rolled bars and wire rodBS EN ISO 9443:2018National forewordThis British Standard is the UK implementation of EN ISO 9443:2018. It is identical to ISO 9443:2018. It supersedes BS EN 10221
2、:1996, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ISE/105, Steels for Heat Treatment, Alloy Steels, Free-Cutting Steels and Stainless Steels.A list of organizations represented on this committee can be obtained on request to its secretary.This pub
3、lication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 95465 8ICS 77.140.60; 77.140.10; 77.140.20Compliance with a British Standar
4、d cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 9443:2018EUROPEAN STANDARDNORME EUROPENNEEU
5、ROPISCHE NORMEN ISO 9443July 2018ICS 77.140.20; 77.140.60; 77.140.10 Supersedes EN 10221:1995EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 9443:2018: EAll rig
6、hts of exploitation in any form and by any means reserved worldwide for CEN national MembersSurface quality classes for hot-rolled bars and wire rod (ISO 9443:2018)Classes de qualit de surface des barres et fils-machine lamins chaud (ISO 9443:2018)Oberflchengteklassen fr warmgewalzten Stabstahl und
7、Walzdraht (ISO 9443:2018)This European Standard was approved by CEN on 23 May 2018.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and
8、 bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the re
9、sponsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav R
10、epublic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 9443:2018 (E)European forewor
11、dThis document (EN ISO 9443:2018) has been prepared by Technical Committee ISO/TC 17 “Steel“ in collaboration with Technical Committee ECISS/TC 105 “Steels for heat treatment, alloy steels, free-cutting steels and stainless steels” the secretariat of which is held by DIN.This European Standard shall
12、 be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2019, and conflicting national standards shall be withdrawn at the latest by January 2019.Attention is drawn to the possibility that some of the elements of this docume
13、nt may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN 10221:1995.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement thi
14、s European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia,
15、 Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 9443:2018 has been approved by CEN as EN ISO 9443:2018 without any modification.iiBS EN ISO 9443:2018ISO 9443:2018Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 1
16、4 Ordering and designation . 24.1 Ordering 24.2 Designation 25 Requirements 26 Testing . 26.1 General . 26.2 Test methods . 36.2.1 General 36.2.2 Methods for the detection of discontinuities 36.2.3 Methods for measuring the depth of discontinuities . 36.2.4 Production tests on trial batches . 47 Rep
17、airs 4Annex A (informative) Guideline for applying surface quality classes . 6Bibliography 7 ISO 2018 All rights reserved iiiContents PageBS EN ISO 9443:2018ISO 9443:2018ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO membe
18、r 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, governmenta
19、l 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 ar
20、e 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 d
21、rawn 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 o
22、n 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 expres
23、sions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 17, Steel, Subco
24、mmittee SC 4, Heat treatable and alloy steels.This second edition cancels and replaces the first edition (ISO 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 sur
25、face 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 to the impracticality to differentiate between the two; the admissible po
26、rtion of defective material za and zb has been removed and only z has been kept.iv ISO 2018 All rights reservedBS EN ISO 9443:2018Surface quality classes for hot-rolled bars and wire rod1 ScopeThis document specifies technical delivery requirements for the surface quality of round bars, squares, hex
27、agons and wire rod in the hot rolled condition with nominal dimensions dNfrom 5 mm to 200 mm. This document is applicable to bright products and tool steels, if agreed at the time of enquiry and order between manufacturer and purchaser.By agreement between manufacturer and purchaser, this document c
28、an also be applied to other special profiles.This document is particularly applicable to steels for engineering and structural applications.This document does not include any requirements for the permissible depth of surface decarburization.NOTE The determination of depth of surface decarburization
29、is presented in ISO 3887.The material standards for steel bars and wire rod can exclude the application of one or other of the surface quality classes of this document. They can also cover requirements for surface quality which deviate from this document. In these cases the requirements of the mater
30、ial standard prevail.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced
31、 document (including any amendments) applies.ISO 6929, Steel products Vocabulary3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 6929 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addr
32、esses: ISO Online browsing platform: available at https:/www.iso.org/obp IEC Electropedia: available at http:/www.electropedia.org/3.1delivery lotquantity of steel of the same type and the same dimension ordered with the same requirements for the surface quality and delivered at the same time, unles
33、s otherwise specified in the order or appropriate product standard3.2discontinuitygeometric irregularity projecting inwards3.3imperfectiondiscontinuity (3.2) with a depth smaller than or equal to the specified limiting value which may be left without repairINTERNATIONAL STANDARD ISO 9443:2018 ISO 20
34、18 All rights reserved 1BS EN ISO 9443:2018ISO 9443:20183.4defectdiscontinuity (3.2) with a depth greater than the specified limiting value3.5portion zmaximum admissible portion of defective material in the delivery lot (3.1) in percentage of the delivered mass4 Ordering and designation4.1 OrderingI
35、f the appropriate International Standard specifying the quality requirements for the material does not contain exact specifications for the required surface quality class and the admissible portion of defective material, the following details shall be given in the following order.a) The surface qual
36、ity class (see Table 1) unless class A or default class.b) The maximum admissible portion z of defective material in the total delivery lot (for the default value see Table 1, other values can be agreed at the time of enquiry and order).c) The type of verification, which is left to the producer if n
37、ot specified at the time of enquiry and order.NOTE A guideline for applying surface quality classes is given in Annex A.4.2 DesignationThe required surface finish shall be designated according to Table 1. Two examples are given of possible designations based on the sampling method specified by the p
38、urchaser (e.g. test plan, statistical process control, etc.).EXAMPLE 1 For an agreed surface quality class B and a maximum admissible portion z of defective material of 1 % (default value) in the total delivery lot.Surface quality ISO 9443 class BEXAMPLE 2 For an agreed surface quality class C and a
39、 maximum admissible portion z of defective material of 0,5 % in the total delivery lot.Surface quality ISO 9443 class C z 0,55 RequirementsThe surface quality shall comply with the requirements of surface quality classes defined in Table 1 (see also Figure 1) and shall be specified or agreed in acco
40、rdance with 4.1 and 4.2.The handling of defective material should also be agreed upon at the time of enquiry and order; for example, whether it shall be sent back to the manufacturer or scrapped, etc. This also applies if the total delivery is accepted.6 Testing6.1 General6.1.1 The manufacturer take
41、s, under their own responsibility and according to their own judgement, suitable measures to supervise their production in view of the specified surface quality requirements.2 ISO 2018 All rights reservedBS EN ISO 9443:2018ISO 9443:2018NOTE At the present state of development, facilities for the con
42、tinuous testing of the specific surface quality classes at high temperatures do not exist. After rolling, the wire rod manufacturer can normally only check the ends of the coils for compliance with surface quality requirements.6.1.2 The purchaser is free to check the surface quality of the delivered
43、 material by methods they regard as suitable. However, disputes shall be resolved by measuring depths of discontinuities by the techniques specified in 6.2.3.2.6.2 Test methods6.2.1 General6.2.1.1 The methods used for detecting discontinuities and measuring the depth of discontinuities shall be suff
44、iciently accurate and shall give reproducible results.6.2.1.2 Non-destructive methods (see 6.2.2.2 and 6.2.3.1) and also technological methods (see 6.2.2.3) may be used.NOTE Given the limitations of continuous inspection equipment for wire rod relative to the exactness of imperfection depth measurem
45、ents, it is normally only possible to inspect the ends of the coils. Therefore, it cannot be proved that no value greater than the specified value is to be found in the coil as a whole.6.2.1.3 In cases of dispute, the measurements carried out in accordance with 6.2.3.2 on products in the delivery co
46、ndition shall be decisive.6.2.2 Methods for the detection of discontinuities6.2.2.1 The following methods or other suitable ones can be used for the detection of surface discontinuities.6.2.2.2 The following non-destructive methods may be taken into consideration: visual examination; magnetic flux m
47、ethods, for example, magnetic particle inspection or probe methods, the methods can be manual or automatized; inductive methods (eddy current); dye penetrant methods.6.2.2.3 The following technological test methods may be taken into consideration: hot-upsetting tests; cold compression tests; torsion
48、 tests (see ISO 7800).6.2.3 Methods for measuring the depth of discontinuities6.2.3.1 By non-destructive test methods such as the following: magnetic flux measurement with rotating or stationary probes; inductive methods; potential probe method using direct current; ISO 2018 All rights reserved 3BS
49、EN ISO 9443:2018ISO 9443:2018 ultrasonic tests.These methods can only determine the depth of discontinuities approximately.6.2.3.2 In case of dispute the exact determination of the depth of a discontinuity on products in the delivery condition shall be carried out by examining a metallographic specimen. The depth is measured in the radial direction and the measurement shall be decisive (see also Table 1, footnote b).6.2.4 Production tests on trial batchesWhen receiving inspection reveals questionable quality, the processing of a tri
