1、BRITISH STANDARDBS EN 10087:1999Incorporating Corrigenda Nos. 1 and 2Free cutting steels Technical delivery conditions for semi-finished products, hot-rolled bars and rodsThe European Standard EN 10087:1998 has the status of a British StandardICS 77.140.60BS EN 10087:1999This British Standard was pu
2、blished under the authority of the Standards Policy and Strategy Committee on 15 January 1999 BSI 23 January 2006ISBN 0 580 30635 6National forewordThis British Standard is the English language version of EN 10087:1998. Together with BS EN 10083-1:1991, BS EN 10084:1998, BS EN 10088-1:1995, BS EN 10
3、088-2:1995 and BS EN 10088-3:1995, it supersedes BS 970-1:1996 which is withdrawn.National annex NA describes steels used in the United Kingdom but not included in the European Standard.The UK participation in its preparation was entrusted to Technical Committee ISE/31, Wrought steels, which has the
4、 responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK.A list of or
5、ganizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standa
6、rds Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue.A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.Compliance with a British Standard
7、does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 12, an inside back cover and a back cover.This standard has been updated (see copyright date) and may have had amendme
8、nts incorporated. This will be indicated in the amendment table on the inside front cover.Amendments issued since publicationAmd. No. Date Comments10442 Corrigendum No. 1February 1999 National annex NA added15803 Corrigendum No. 223 January 2006 Revision of the supersession detailsBS EN 10087:1999 1
9、6 January 2006 iContentsPageNational foreword Inside front coverForeword 2Text of EN 10087 3National annex NA (informative) Non-conflicting national additions Inside back coveriiblankEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 10087September 1998ICS 77.140.50; 77.140.60; 77.140.65Descriptors:
10、Iron and steel products, hot-rolled products, metal bars, wire rod, free machining steels, grades, quality, chemical position, mechanical properties, heat treatment, delivery condition, surface defects, inspection, testsEnglish versionFree-cutting steels Technical delivery conditions for semi-finish
11、ed products, hot-rolled bars and rodsAciers de dcolletage Conditions techniques de livraison pour les demi-produits, barres et fils-machine lamins chaudAutomatensthle Technische Lieferbedingungen fr Halbzeug, warmgewalzte Stbe und WalzdrahtThis European Standard was approved by CEN on 4 September 19
12、98.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 bibliographical references concerning such national standards may be obtained o
13、n application to the Central Secretariat 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 responsibility of a CEN member into its own language and notified to the Central Secretariat
14、 has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.CENEuropean Co
15、mmittee for StandardizationComit Europen de NormalisationEuropisches Komitee fr NormungCentral Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.Ref. No. EN 10087:1998 EEN 10087:1998 16 Januar
16、y 20062ForewordThis European Standard has been prepared by Technical Committee ECISS/TC 23, Steels for heat treatment, alloy steels and free-cutting steels Qualities and dimensions, the Secretariat of which is held by DIN.ECISS/TC 23 met on 1st/2nd July 1997 in Dsseldorf and agreed on the text for s
17、ubmission of this draft European Standard to COCOR-Vote. The following countries were represented in the meeting: Finland, France, Germany, Italy and United Kingdom.The United Kingdom issues a non-conflicting national addition which describes a steel used in the United Kingdom but not included in th
18、is European Standard. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 1999, and conflicting national standards shall be withdrawn at the latest by March 1999.According to the CEN/CENELEC Int
19、ernal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerlan
20、d and the United Kingdom.ContentsPageForeword 21Scope 32 Normative references 33 Definitions 33.1 Free-cutting steels 34 Classification and designation 34.1 Designation 35 Information to be supplied by the purchaser 35.1 Mandatory information 35.2 Options 46 Manufacturing process 46.1 General 46.2 T
21、reatment condition at delivery 46.3 Cast separation 47 Requirements 47.1 Chemical composition and mechanical properties 4Page7.2 Weldability 47.3 Structure 47.4 Internal soundness 47.5 Surface quality 47.6 Dimensions, tolerances on dimensions and shape 58 Inspection and testing 58.1 Types and conten
22、ts of inspection documents 58.2 Specific inspection and testing 59 Marking 5Annex A (normative) Ruling section for the mechanical properties 11Annex B (normative) Supplementary or special requirements 12Annex C (informative) Bibliography 12Annex D (informative) Dimensional standards applicable to pr
23、oducts complying with this European Standard 12National annex NA (informative) Non-conflicting national additions Inside back coverFigure A.1 Diameter of the ruling section for square and rectangular sections for quenching in oil or water 11Table 1 Types of steel, chemical composition (applicable to
24、 cast analysis) 6Table 2 Permissible deviations between specified analysis and product analysis 6Table 3 Hardness and tensile strength in the untreated condition of free-cutting steels not intended for heat-treatment 7Table 4 Hardness and tensile strength of case hardening free-cutting steels in the
25、 untreated condition 7Table 5 Mechanical properties of direct-hardening free-cutting steels 8Table 6 Conditions for heat treatment of case-hardening free-cutting steels 9Table 7 Conditions for heat treating of direct-hardening free-cutting steels 9Table 8 Test conditions for verification of complian
26、ce with the various requirements 10Table NA1 Chemical composition (% by mass) 13Table NA2 Mechanical properties in the normalized condition 13Table NA3 Mechanical properties in the quenched and tempered condition 13EN 10087:1998 16 January 2006 31 Scope1.1 This European Standard gives the technical
27、delivery conditions for semi-finished products; hot-rolled bars (including peeled bars); rods;manufacturerd from the free-cutting steels listed in Table 1.This European Standard covers those groups of free-cutting steels classified as listed in Table 1.NOTE European Standards for similar steels are
28、listed for information in Annex C.1.2 In special cases, variations in these technical delivery conditions or additions to them may form the subject of an agreement at the time of enquiry and order (see Annex B).1.3 In addition to the specifications of this European Standard, the general technical de
29、livery conditions specified in EN 10021 are applicable unless otherwise specified below.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publ
30、ications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.EN 10002-1,
31、Metallic materials Tensile testing Part 1: Method of test (at ambient temperature). EN 10003-1, Metallic materials Brinell hardness test Part 1: Test method. EN 10020, Definition and classification of grades of steel. EN 10021, General technical delivery requirements for steel and iron products. EN
32、10027-1, Designation systems for steel Part 1: Steel names, principal symbols. EN 10027-2, Designation systems for steel Part 2: Numerical system. EN 10052, Vocabulary of heat treatment terms for ferrous products. EN 10079, Definition of steel products. EN 10204, Metallic products Types of inspectio
33、n documents (includes amendment A1:1995). EN 10221, Surface quality classes for hot-rolled bars and rods Technical delivery conditions. CR 10260 ECISS IC 10, Designation systems for steel Additional symbols. EN ISO 377, Steel and steel products Location and preparation of test pieces for mechanical
34、testing. EURONORM 103, Microscopic determination of the ferritic or austenitic grain size of steels1). ISO 14284, Steel and iron Sampling and preparation of samples for the determination of chemical composition. 3 DefinitionsFor the purposes of this European Standard the following definition applies
35、 in addition to the definitions in EN 10020, EN 10021, EN 10052, EN 10079, EN ISO 377 and ISO 14284.3.1 free-cutting steelssteels with a minimum sulfur content of at least, in general, 0,1 %, are regarded as free-cutting steels4 Classification and designation4.1 ClassificationAll steels covered by t
36、his European Standard are classified as non-alloy quality steels according to EN 10020.4.2 Designation4.2.1 Steel namesFor the steel grades covered by this European Standard, the steel names, as given in Table 1, are allocated in accordance with EN 10027-1 and CR 10260.4.2.2 Steel numbersFor the ste
37、el grades covered by this European Standard, the steel numbers, as given in Table 1, are allocated in accordance with EN 10027-2.5 Information to be supplied by the purchaser5.1 Mandatory informationThe following information shall be supplied by the purchaser at the time of enquiry and order: a) the
38、 quantity to be delivered;b) the designation of the product form (e.g. round or square);c) the number of the dimensional standard (see Annex D);1) It may be agreed at the time of ordering, until this EURONORM has been adopted as a European Standard, that either this EURONORM or a corresponding natio
39、nal standard may be applied.EN 10087:19984 16 January 2006d) the dimensions and tolerances on dimensions and shape and, if applicable, letters denoting relevant special tolerances;e) the number of this European Standard (EN 10087);f) steel name or steel number (see 4.2);g) the standard designation f
40、or a test report (2.2) or, if required, any other type of inspection document in accordance with EN 10204 (see 8.1).EXAMPLE20, rounds, EURONORM 60, 40 8 000;EN 10087, 35S20;EN 10204, 2.2; or20 rounds, EURONORM, 60, 40 8 000;EN 10087, 1.0726;EN 10204, 2.2.5.2 OptionsA number of options are specified
41、in this European Standard and listed below. If the purchaser does not indicate his wish to implement one of these options, the supplier shall supply in accordance with the basic specification of this European Standard (see 5.1):a) any special requirement on treatment condition at delivery (see 6.2);
42、b) any special requirement on grain size (see 7.3 and B.2);c) any requirement for internal soundness (see 7.4 and B.3);d) any requirement relating to surface quality (see 7.5.3);e) any requirement concerning suitability of bars and for bright drawing (see 7.5.4);f) any requirement relating to remova
43、l of surface defects (see 7.5.5);g) any requirement concerning special marking of the products (see clause 9 and B.5);h) any special requirement concerning verification of the mechanical properties in the quenched and tempered condition on a reference test piece (see 8.2.1.1 e) and B.1);i) any verif
44、ication of the product analysis (see 8.2.1.1 f), Table 8 and B.4).6 Manufacturing process6.1 GeneralThe manufacturing process of the steel and of the products is left to the discretion of the manufacturer with the restrictions given by the requirements in 6.2 (see also 7.3).6.2 Treatment condition a
45、t deliveryUnless otherwise agreed, products shall be delivered in the untreated condition.6.3 Cast separationThe products shall be delivered separated by cast.7 Requirements7.1 Chemical composition and mechanical propertiesThe product shall have a chemical composition and mechanical properties, i.e.
46、 tensile strength and hardness, appropriate to the product form and treatment condition as set out in Table 1 to Table 5.7.2 WeldabilityBecause of their high sulfur and phosphorus contents, free-cutting steels are not normally recommended for welding.7.3 StructureUnless otherwise agreed at the time
47、of enquiry and order, the grain size shall be left to the discretion of the manufacturer. If, for case-hardening or direct-hardening steels, a fine grain structure is required in accordance with a reference treatment, this must be agreed at the time of enquiry and order (see B.2).7.4 Internal soundn
48、essRequirements for internal soundness may be agreed upon at the time of enquiry and order, e.g. on the basis of non-destructive tests (see B.3).7.5 Surface quality7.5.1 All products shall have a surface finish appropriate to the forming processes applied.7.5.2 Minor surface imperfections which may
49、occur also under normal manufacturing conditions, such as scores originating from rolled-in scale in the case of hot-rolled products, shall not be regarded as defects.7.5.3 Where appropriate, requirements relating to the surface quality of the products shall be agreed on at the time of enquiry and order with reference to EN 10221.NOTE It is more difficult to detect and eliminate surface discontinuities from coiled products than from cut lengths. This should be taken into account when agreements are made on
