1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Heat-treatable steels, alloy steels and free-cutting steelsPart 4: Free-cutting steels (ISO 683-4:2016)BS EN ISO 683-4:2018National forewordThis British Standard is the UK implementation of EN ISO 683-4:2018. It is iden
2、tical to ISO 683-4:2016. It supersedes BS EN 10087:1999, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ISE/105, Steels for Heat Treatment, Alloy Steels, Free-Cutting Steels and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 ca
3、n be obtained on request to its secretary.This publication 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 96846 4ICS 77.140.10; 77.
4、140.20Compliance with a British Standard 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 683-
5、4:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 683-4June 2018ICS 77.140.10; 77.140.20 Supersedes EN 10087:1998EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref.
6、No. EN ISO 683-4:2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersHeat-treatable steels, alloy steels and free-cutting steels - Part 4: Free-cutting steels (ISO 683-4:2016)Aciers pour traitement thermique, aciers allis et aciers pour dcolletag
7、e - Partie 4: Aciers pour dcolletage (ISO 683-4:2016)Fr eine Wrmebehandlung bestimmte Sthle, legierte Sthle und Automatensthle - Teil 4: Automatensthle (ISO 683-4:2016)This European Standard was approved by CEN on 18 May 2018.CEN members are bound to comply with the CEN/CENELEC Internal Regulations
8、which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.This
9、European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility 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
10、 are the national standards bodies of 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,
11、 Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 683-4:2018 (E)European forewordThe text of ISO 683-4:2016 has been prepared by Technical Committee ISO/TC 17 “Steel” of the International Organization for Standardization (ISO) and has b
12、een taken over as EN ISO 683-4:2018 by 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 be given the status of a national standard, either by publication of an ide
13、ntical text or by endorsement, at the latest by December 2018, and conflicting national standards shall be withdrawn at the latest by December 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible
14、for identifying any or all such patent rights.This document supersedes EN 10087:1998.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Re
15、public, 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kin
16、gdom.Endorsement noticeThe text of ISO 683-4:2016 has been approved by CEN as EN ISO 683-4:2018 without any modification.iiBS EN ISO 683-4:2018EN ISO 683-4:2018 (E)The European steel numbers to the steel grades are to be found in informative Annex C. Some European steel numbers were not available at
17、 the publication of this International standard, for this reason they are given now below.Steel name9S20 17SMn20 35SMn20 35SMnPb20Steel number1.0721 1.0735 1.0766 1.0767The references to following European standards are given for information:EN 10017, Steels rod for drawing and/or cold rolling Dimen
18、sions and tolerancesEN 10021, General technical delivery conditions for steel productsEN 10058, Hot rolled flat steel bars for general purposes Dimensions and tolerances on shape and dimensionsEN 10059, Hot rolled square steel bars for general purposes Dimensions and tolerances on shape and dimensio
19、nsEN 10060, Hot rolled round steel bars - Dimensions and tolerances on shape and dimensionsEN 10061, Hot rolled hexagon steel bars Dimensions and tolerances on shape and dimensionsEN 10204, Metallic products Types of inspection documentsEN 10308, Non-destructive testing Ultrasonic testing of steel b
20、arsiiiBS EN ISO 683-4:2018ISO 683-4:2016Foreword v1 Scope . 12 Normative references 13 Terms and definitions . 24 Classification and designation . 24.1 Classification . 24.2 Designation 25 Information to be supplied by the purchaser. 25.1 Mandatory information . 25.2 Options/supplementary or special
21、 requirements 35.3 Ordering example . 36 Manufacturing process 36.1 General . 36.2 Heat treatment and surface condition at delivery 36.2.1 Normal condition at delivery 36.2.2 Particular heat-treatment condition . 36.3 Traceability of the cast . 37 Requirements 47.1 Chemical composition, hardness, an
22、d mechanical properties 47.1.1 General 47.1.2 Chemical composition . 47.1.3 Mechanical properties 47.2 Machinability 47.3 Weldability 47.4 Grain size 47.5 Internal soundness 47.6 Surface quality . 57.7 Shape, dimensions, and tolerances 58 Inspection 58.1 Testing procedures and types of documents 58.
23、2 Frequency of testing . 68.3 Specific inspection and testing 68.3.1 Verification of the hardness and mechanical properties 68.3.2 Visual and dimensional inspection 69 Test methods . 69.1 Chemical analysis 69.2 Hardness and mechanical tests 69.2.1 Hardness . 69.2.2 Mechanical tests . 69.3 Retests 61
24、0 Marking 7Annex A (normative) Ruling sections for mechanical properties .14Annex B (normative) Supplementary or special requirements 17Annex C (informative) Designation of steels given in this part of ISO 683 and of comparable grades covered in various designation systems19Annex D (informative) Dim
25、ensional standards applicable to products complying with this part of ISO 683 .20Bibliography .21iv ISO 2016 All rights reservedContents PageBS EN ISO 683-4:2018ISO 683-4:2016ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
26、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, govern
27、mental 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 maintenan
28、ce 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
29、 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
30、/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 meaning of ISO specific terms and expressions related to conformity as
31、sessment, 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.The committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 4, Heat treatable and
32、alloy steels.This second edition cancels and replaces the first edition (ISO 683-4:2014), of which it constitutes a minor revision.ISO 683 consists of the following parts, under the general title Heat-treatable steels, alloy steels and free-cutting steels: Part 1: Non-alloy steels for quenching and
33、tempering Part 2: Alloy steels for quenching and tempering Part 3: Case-hardening steels Part 4: Free-cutting steels Part 5: Nitriding steels Part 14: Hot-rolled steels for quenched and tempered springs Part 15: Valve steels for internal combustion engines Part 17: Ball and roller bearing steels Par
34、t 18: Bright steel products ISO 2016 All rights reserved vBS EN ISO 683-4:2018This page deliberately left blankHeat-treatable steels, alloy steels and free-cutting steels Part 4: Free-cutting steels1 ScopeThis part of ISO 683 gives the technical delivery requirements for semi-finished products (e.g.
35、 blooms, billets, slabs), bars and wire rod, manufactured from the free-cutting steels listed in Table 2 and supplied in one of the treatment conditions given for the different types of products in Table 1, rows 2 to 4.This part of ISO 683 covers three groups of free-cutting steels for mechanical pu
36、rposes as listed in Table 2, namelya) not intended for heat treatment,b) suitable for case-hardening, andc) suitable for quenching and tempering.Free-cutting steels are often used as bright bars. For these products, refer to ISO 683-18.In special cases, variations in these technical delivery require
37、ments or additions to them can form the subject of an agreement at the time of enquiry and order (see 5.2 and Annex B).In addition to this part of ISO 683, the general technical delivery requirements of ISO 404 are applicable.2 Normative referencesThe following documents, in whole or in part, are no
38、rmatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 377, Steel and steel products Location and preparation o
39、f samples and test pieces for mechanical testingISO 404, Steel and steel products General technical delivery requirementsISO 643, Steels Micrographic determination of the apparent grain sizeISO 4885, Ferrous products Heat treatments VocabularyISO 4948-1, Steels Classification Part 1: Classification
40、of steels into unalloyed and alloy steels based on chemical compositionISO 4948-2, Steels Classification Part 2: Classification of unalloyed and alloy steels according to main quality classes and main property or application characteristicsISO 6506-1, Metallic materials Brinell hardness test Part 1:
41、 Test methodISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperatureISO 6929, Steel products VocabularyISO 9443, Heat-treatable and alloy steels Surface quality classes for hot-rolled round bars and wire rods Technical delivery conditionsINTERNATIONAL STANDARD ISO 68
42、3-4:2016 ISO 2016 All rights reserved 1BS EN ISO 683-4:2018ISO 683-4:2016ISO 10474, Steel and steel products Inspection documentsISO 14284, Steel and iron Sampling and preparation of samples for the determination of chemical compositionISO/TR 9769, Steel and iron Review of available methods of analy
43、sisISO/TS 4949, Steel names based on letter symbols3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 377, ISO 4885, ISO 4948-1, ISO 4948-2, ISO 6929, ISO 14284 and the following apply.3.1ruling sectionsection for which the specified mechanical propertie
44、s shall applyNote 1 to entry: Independent of the actual shape and dimensions of the cross-section of the product, the size of its ruling section is always given by a diameter. This corresponds to the diameter of an “equivalent round bar”. That is a round bar which will show the same cooling rate as
45、the actual ruling section of the product concerned at its position for taking the test pieces, when being cooled from austenitizing temperature.3.2free-cutting steelssteels characterized by good machinability with high metal removal rate, mostly obtained by higher than normal contents of sulphurNote
46、 1 to entry: Other elements besides sulfur can be added for further improving the machinability.4 Classification and designation4.1 ClassificationThe classification of the relevant steel grades is allocated in accordance with ISO 4948-1 and ISO 4948-2. All steels covered by this part of ISO 683 are
47、classified as non-alloy quality steels.4.2 DesignationFor the steel grades covered by this part of ISO 683, the steel names given in the relevant tables are allocated in accordance with ISO/TS 4949.5 Information to be supplied by the purchaser5.1 Mandatory informationThe manufacturer shall obtain th
48、e following information from the purchaser at the time of enquiry and order:a) the quantity to be delivered;b) the designation of the product form (e.g. slab, bloom, billet, round bar, wire rod);c) either the designation of the dimensional standard and the dimensions and tolerances selected from thi
49、s (see 7.7) or the designation of the drawing or any other document, covering the dimensions and tolerances required for the product;d) a reference to this part of ISO 683, i.e. ISO 683-4;2 ISO 2016 All rights reservedBS EN ISO 683-4:2018ISO 683-4:2016e) the designation of the steel grade given in Table 2;f) standard designation for a test report 2.2 or, if required, any other type of inspection document in accordance with ISO 10474.5.2 Options/supplementary or special requirementsA number of options
