BS EN 10267-1998 Ferritic-pearlitic steels for precipitation hardening from hot-working temperatures《热加工温度下沉淀硬化用铁素体-珠光体钢板材》.pdf

《BS EN 10267-1998 Ferritic-pearlitic steels for precipitation hardening from hot-working temperatures《热加工温度下沉淀硬化用铁素体-珠光体钢板材》.pdf》由会员分享，可在线阅读，更多相关《BS EN 10267-1998 Ferritic-pearlitic steels for precipitation hardening from hot-working temperatures《热加工温度下沉淀硬化用铁素体-珠光体钢板材》.pdf（14页珍藏版）》请在麦多课文档分享上搜索。

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 10267:1998 The Euro

2、pean Standard EN 10267:1998 has the status of a British Standard ICS 77.140.10; 77.140.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Ferritic-pearlitic steels for precipitation hardening from hot-working temperaturesThis British Standard, having been prepared under the di

3、rection of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 June 1998 BSI 1998 ISBN 0 580 29162 6 BS EN 10267:1998 Amendments issued since publication Amd. No. Date Text affected National foreword This British Standard is the English

4、language version of EN 10267:1998. The UK participation in its preparation was entrusted to Technical Committee ISE/31, Wrought steels, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposa

5、ls for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement internat

6、ional or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include

7、 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 itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN t

8、itle page, pages 2 to 11 and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for C

9、EN national Members. Ref. No. EN 10267:1998 E EUROPEAN STANDARD EN 10267 NORME EUROPE ENNE EUROPA ISCHE NORM January 1998 ICS 77.140; 77.140.10 Descriptors: Steels, non alloy steels, heat treatable steels, hot-working, billets, metal bars, designation, grades: quality, chemical composition, mechanic

10、al properties, quality, inspection, conformity tests, testing conditions, marking English version Ferritic-pearlitic steels for precipitation hardening from hot-working temperatures Aciers de type ferrite-perlite aptes au durcissement par pre cipitation a partir des tempe ratures de formage a chaud

11、Von Warmformgebungstemperatur ausscheidungsha rtende ferritisch-perlitische Sta hle This European Standard was approved by CEN on 11 December 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of

12、 a national standard 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 versio

13、n in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France

14、, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 10267:1998 BSI 1998 Foreword This European Standard has been prepared by ECISS/TC 23, Steels for heat treatment, alloy steels and free-cutting steels-qualiti

15、es, 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 identical text or by endorsement, at the latest by July 1998, and conflicting national standards shall be withdrawn at the latest by July 1998. According

16、to the CEN/CENELEC Internal 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, Spa

17、in, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Classification and designation 3 4.1 Classification 3 4.2 Designation 3 5 Information to be supplied by the purchaser 3 5.1 Mandatory information 3 5.2 Options 4 6 Manufactur

18、ing process 4 6.1 General 4 6.2 Deoxidation 4 6.3 Heat-treatment and surface condition at delivery 4 7 Requirements 4 7.1 Chemical composition and mechanical properties 4 7.2 Structure 4 7.3 Internal soundness 4 7.4 Surface quality 4 7.5 Dimensions, tolerances on dimensions and shape 4 8 Inspection

19、and testing 5 8.1 Types and contents of inspection documents 5 8.2 Specific inspection and testing 5 9 Marking 5 Annex A (normative) Supplementary or special requirements 11 Annex B (informative) Guide to additional property values 11 Annex C (informative) Dimensional standards applicable to product

20、s complying with this European standard 11Page 3 EN 10267:1998 BSI 1998 1 Scope 1.1 This European Standard gives the technical delivery requirements for semi-finished products and bars of the non-alloy special steels listed in Tables 3 and 5. The products are supplied in the conditions given in Tabl

21、e 1, line 2 to 4, and in one of the surface conditions given in Table 2. 1.2 In special cases, variations in these technical delivery requirements or additions to them may form the subject of an agreement at the time of enquiry and order (see annex A). 1.3 In addition to the specifications of this E

22、uropean Standard, the general technical delivery requirements of EN 10021 are applicable, unless otherwise specified. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate

23、places in the text and the publications 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 r

24、eferred to applies. EN 10002-1, 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

25、for steel and iron products. EN 10027-1, Designation systems for steel Part 1: Steel names, principal symbols. EN 10027-2, Designation systems for steel Part 2: Numerical system. EN 10079, Definition of steel products. EN 10204, Metallic products Types of inspection documents (includes amendment A1:

26、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 for steel names. CR 10261, ECISS IC 11 Iron and steel Review of available methods of chemical analysis. prEN ISO 377, Steel and

27、steel products Location and preparation of test pieces for mechanical testing. ISO 14284, Steel and iron Sampling and preparation of samples for the determination of chemical composition. 3 Definitions For the purposes of this European Standard, the definitions given in EN 10020, EN 10021, EN 10079,

28、 prEN ISO 377 and ISO 14284 apply. 4 Classification and designation 4.1 Classification All steels covered by this European Standard are classified as non-alloy special steels according to EN 10020. 4.2 Designation 4.2.1 Steel names For the steel grades covered by this European Standard, the steel na

29、mes as given in Tables 3 and 5 are allocated in accordance with EN 10027-1 and CR 10260. 4.2.2 Steel numbers For the steel grades covered by this European Standard, the steel numbers as given in Tables 3 and 5 are allocated in accordance with EN 10027-2. 5 Information to be supplied by the purchaser

30、 5.1 Mandatory information The 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 form (e.g. round or square). c) The number of the dimensional standard. d) The dimensions and tolerances on dim

31、ensions and shape and, if applicable, letters denoting relevant special tolerances. e) The number of this European Standard (EN 10267). f) Steel name or steel number (see 4.2). g) If appropriate, the symbol for the treatment condition at delivery (see 6.3.1 and Table 1). h) If appropriate, the symbo

32、l for the surface condition at delivery (see 6.3.2 and Table 2). i) If required, the type of inspection document in accordance with EN 10204 (see 8.1). EXAMPLE: 20 rounds EURONORM 60 403 8000 EN 10267 19MnVS6+P EN 10204 2.2 or 20 rounds EURONORM 60 403 8000 EN 10267 1.1301+P EN 10204 2.2Page 4 EN 10

33、267:1998 BSI 1998 5.2 Options A number of options are specified in this European Standard and are listed below. If the purchaser does not indicate his wish to implement one of these options, the supplier shall supply in accordance with the base specification of this European Standard (see 5.1). a) A

34、ny requirement concerning non-metallic inclusion content (see 7.2.2 and A.1). b) Any requirement for internal soundness (see 7.3 and A.2). c) Any requirement relating to surface quality (see 7.4.1). d) Any requirement relating to removal of surface defects (see 7.4.2). e) Any requirement concerning

35、special marking of the products (see clause 9 and A.4). f) Any verification of the product analysis (see Table 6 and A.3). 6 Manufacturing process 6.1 General The manufacturing process of the steel and of the products is left to the discretion of the manufacturer with the restrictions given by the r

36、equirements in 6.2 and 6.3. 6.2 Deoxidation All steels shall be killed. 6.3 Heat-treatment and surface condition at delivery 6.3.1 Heat-treatment condition Products which are intended for hot forging, shall be delivered in the untreated condition or in the condition “treated for cold shearing”. Prod

37、ucts which are intended for machining, shall be delivered in the precipitation hardened condition. 6.3.2 Surface condition Unless otherwise agreed (see Table 2, lines 3 to 6) at the time of enquiry and order, the products shall be delivered in the as-hot-worked condition. 6.3.3 Cast separation The s

38、teels shall be delivered separated by casts. Identified products stemming from several casts may be delivered in the same means of transport, e.g. lorry or wagon. 7 Requirements 7.1 Chemical composition and mechanical properties 7.1.1 Where the products are to be delivered in the untreated condition

39、, the requirements for chemical composition given in Tables 3 and 4 apply. In addition, for products to be delivered in the condition “treated for cold shearing”, a maximum Brinell hardness of 255 applies. NOTE Guidance data for mechanical properties of hot forgings after precipitation hardening are

40、 given in Table B.1. 7.1.2 Where the products are to be delivered in the precipitation hardened condition, the requirements for mechanical properties given in Table 5 apply. NOTE In this case, the chemical composition given in Table 3 is for guidance only. 7.2 Structure 7.2.1 Steels in Table 5 are c

41、ontrol-cooled from the hot-working temperature to produce a ferritic-pearlitic structure. Under certain circumstances, small portions of bainite and/or martensite may be present. 7.2.2 For the content of non-metallic inclusions, see A.1. 7.3 Internal soundness Requirements for internal soundness may

42、 be agreed upon at the time of enquiry and order, e.g. on the basis of non-destructive tests (see A.2). 7.4 Surface quality 7.4.1 At the time of enquiry and order, agreements may be made concerning the required surface quality. In the case of bars, such agreements should be made in accordance with E

43、N 10221. 7.4.2 Repair of surface discontinuities by welding is not permitted. If surface discontinuities are removed, the kind of surface discontinuities and permissible depth for their removal should, where appropriate, be agreed upon at the time of enquiry and order. 7.5 Dimensions, tolerances on

44、dimensions and shape The nominal dimensions, tolerances on dimensions and shape tolerances for the product shall be agreed at the time of enquiry and order, if possible, with reference to the dimensional standards applicable (see annex C).Page 5 EN 10267:1998 BSI 1998 Table 1 Combinations of usual c

45、onditions at delivery, product forms (and their application) and requirements according to Tables 3 to 5 12 34 Condition at delivery “x” indicates applicable for 1 Symbol Semi-finished products and bars for hot forging Bars for machining Applicable requirements 2 Untreated None or + U x Chemical com

46、position according to Tables 3 and 4. 3 Treated for cold shearing + S x Chemical composition according to tables 3 and 4 and maximum Brinell hardness according to 7.1.1. 4 Precipitation hardened + P x Mechanical properties according to Table 5. The chemical composition given in Table 3 is given for

47、guidance only. 8 Inspection and testing 8.1 Types and contents of inspection documents 8.1.1 For each delivery, the issue of any inspection document according to EN 10204 may be agreed upon at the time of enquiry and order. 8.1.2 If, in accordance with the agreements made at the time of enquiry and

48、order, a test report is to be provided, this shall cover: a) the statement that the material complies with the requirements of the order; b) the results of the cast analysis for all elements specified for the type of steel supplied. (This also applies to the grades of Table 5.) 8.1.3 If, in accordan

49、ce with the agreements in the order, an inspection certificate 3.1.A, 3.1.B or 3.1.C or an inspection report 3.2 (see EN 10204) is to be provided, the specific inspections and tests described in 8.2 shall be carried out and their results shall be certified in the document. In addition, the document shall cover: a) the results of the cast analysis provided by the manufacturer for all elements specified in Table 3 for the steel type concerned (this also applies to the grades of Table 5); b) the results of all