1、BRITISH STANDARDBS EN 10087:1999Incorporating Corrigenda Nos. 1 and 2Free cutting steels conditions for semi-finished products, hot-rolled bars and rodsThe European Standard EN 10087:1998 has the status of a British StandardICS 77.140.60Technical delivery BS EN 10087:1999National forewordThis BritiT
2、ogBSwhiNatinThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 15 January 1999 BSI 23 January 2006ISBN 0 580 30635 6The UK participation in its preparation was entrusted to Technical Committee ISE/31, Wrought steels, which has the responsibility
3、 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 organizations rep
4、resented 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 Standards Corresponde
5、nce 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 does not of its
6、elf 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 amendments incorporate
7、d. 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 detailssh Standard is the English langua
8、ge version of EN 10087:1998. ether with BS EN 10083-1:1991, BS EN 10084:1998, BS EN 10088-1:1995, EN 10088-2:1995 and BS EN 10088-3:1995, it supersedes BS 970-1:1996 ch is withdrawn.ional annex NA describes steels used in the United Kingdom but not cluded in the European Standard.BS EN 10087:1999 16
9、 January 2006ContentsPageNational foreword Inside front coverForeword 2Text of EN 10087 3National annex NA (informative) Non-conflicting national additions Inside back coveriiiblankEUROPISCHE NORMICS 77.140.50; 77Descriptors: Iron al position, mechanical properties, heat treatment, delivery conditio
10、n, surface defects, inspection, testsFree-cutting steels Technical delivery conditions for semi-finished products, hot-rolled bars and rodsAciers de dcolletage de livraison pour lesfils-machine laminsEuropean Committee for Standardizationfr NormungStassart 3d by any meaComit Europen de NormalEuropis
11、ches Komitee Central Secretariat: rue de 1998 CEN All rights of exploitation in any form anMembers.ns reserved worldwide for CEN national Ref. No. EN 10087:1998 Eisation6, B-1050 BrusselsCentral Secretariat has the same status as the official versions.CEN members are the national standards bodies of
12、 Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.CENRegulations which stipulate the conditions for giving this European Standard the status of a national sta
13、ndard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on 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 l
14、anguage made by translation under the responsibility of a CEN member into its own language and notified to the English version Conditions techniques demi-produits, barres et chaudAutomatensthle Technische Lieferbedingungen fr Halbzeug, warmgewalzte Stbe und WalzdrahtThis European Standard was approv
15、ed by CEN on 4 September 1998.CEN members are bound to comply with the CEN/CENELEC Internal EN 10087September 1998.140.60; 77.140.65and steel products, hot-rolled products, metal bars, wire rod, free machining steels, grades, quality, chemicEUROPEAN STANDARDNORME EUROPENNEEN 10087:1998ForewordThis E
16、uropean 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 submission of this dra
17、ft 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 this European Standard.
18、 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 Internal Regulations, th
19、e 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, Switzerland and the United King
20、dom.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 Treatment condition at
21、 delivery 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 contents of inspection documents 58.2 Specific inspection and testing 59 Marking 5Annex A (normative) Ruling section
22、 for the mechanical properties 11Annex B (normative) Supplementary or special requirements 12Annex C (informative) Bibliography 12Annex D (informative) Dimensional standards applicable to products complying with this European Standard 12National annex NA (informative) Non-conflicting national additi
23、ons 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 cast analysis) 6Table 2 Permissible deviations between specified analysis and product analysis 6Table 3 Hardn
24、ess 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 untreated condition 7Table 5 Mechanical properties of direct-hardening free-cutting steels 8Table 6 Condition
25、s 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 compliance with the various requirements 10Table NA1 Chemical composition (% by mass) 13Table NA2 Mechanical propertie
26、s in the 16 January 200626.3 Cast separation 47 Requirements 47.1 Chemical composition and mechanical properties 4normalized condition 13Table NA3 Mechanical properties in the quenched and tempered condition 13EN 10087:19981 Scope1.1 This European Standard gives the technical delivery conditions for
27、 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 listed for information
28、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 delivery conditions speci
29、fied 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 publications are listed her
30、eafter. 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, Metallic materials Tens
31、ile 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 10027-1, Designation sy
32、stems 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 inspection EN 10221, Surface qua
33、lity 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 testing. EURONORM 103, Microscopic determination of the ferriti
34、c 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 in addition to the definitions in EN 10020, EN 10021, EN 10052
35、, 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 this European Standard are classified as non-alloy quality steel
36、s 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 steel grades covered by this European Standard, the steel numbers,
37、 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 quantity to be delivered;b) the designation of the product for
38、m (e.g. round or square);c) the number of the dimensional standard 16 January 2006 3documents (includes amendment A1:1995). (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 national st
39、andard may be applied.EN 10087:1998d) 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 for a test report (2.2)
40、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 in this European Standa
41、rd 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);b) any special requirem
42、ent 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 removal of surface defects (s
43、ee 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 verification of the product
44、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 6.2 Treatment condition at deliveryUnless otherwise agreed, products shall be delivered in the untreated condition.6.3 Cast separationThe products shall be delivered separat
45、ed by cast.7 Requirements7.1 Chemical composition and mechanical propertiesThe product shall have a chemical composition and mechanical properties, i.e. 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 t
46、heir high sulfur and phosphorus contents, free-cutting steels are not normally recommended for welding.7.3 StructureUnless otherwise agreed at the time 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
47、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 soundnessRequirements 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
48、 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 occur also under normal manufacturing conditions, such as scores originating from rolled-in scale in the case of hot-rolled products, shall not be r
49、egarded 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 surface quality.7.5.4 If suitability of bars and rod for bright drawing is required, this shall be agreed at the time of enquiry and order.4 16 Ja
