1、 STD-ES1 BS EN IS0 4957-ENGL 2000 = 1624667 083153b b85 BRITISH STANDARD Tool steels The European Standard EN IS0 4957 1999 has the status of a British Standasd ICs 77.140.35 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN IS0 495 7:2000 STD-BSI BS EN IS0 4957-ENGL 2000
2、D 3624bb9 0833537 533 D BS EN IS0 4957:2000 National foreword This British Standard is the official English language version of EN IS0 49571999. It is identical with IS0 4957 1999. It supersedes BS 4659 1989 which is withdrawn. The UK participation in its preparation was entrusted to Technical Commi
3、ttee ISE/31, Wrought steels, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible internationallEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed - monitor related international and Eur
4、opean 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 Attention is drawn to the fact that CEN and CENELEC Standards nody include an annex which lists normative references to international p
5、ublications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find facility of the
6、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 itself confer immunity from legal obligations. Summa
7、ry of pages This document comprises a front cover, an inside front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, pages ii to iv, pages 1 to 32, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was las
8、t issued This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 2000 O BSI 03-2000 ISBN O 580 35854 2 Amendments issued since publication Comments STD.BSI BS E
9、N IS0 4957-ENGL 2000 m lb24bb9 0833538 458 m EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 4957 December 1999 ICs 25.100.01; 77.140.10; 77.140.20 English version Tool steels (IS0 4957: 1 999) Aciers B outils (IS0 4957:1999) Werkzeugsthle (IS0 49573999) This European Standard was approved
10、by CEN on 15 December 1999. CEN members are bound to comply with the CEWCENELEC Internal Regulations which stipulate he condions for giving this European Standard the status of a national standard without any alteration. Up-todate lists and bibiiographical references concerning such national standar
11、ds 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 language made by translation under the responsibility of a CEN member into its own language and notified to th
12、e Central Secretariat has the same status as the officiai versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland. Italy, Luxembourg, Nelherlands, Norway, Portugal, Spain, Sweden, Switzerland and United
13、Kingdom. EUROPEAN COMMiTEE FOR STANDARDIZATION EUROPAISCHES KOMITEE FOR NORMUNG CO MIT EUROPEEN DE NORMALISATION Central Secretariat: rue de Stamart, 36 51050 Brussels 0 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN IS0 4957
14、3999 E STD.BSI BS EN IS0 4957-ENGL 2000 D Lb24bb9 0833539 394 m EN IS0 4957:1999 Foreword The text of the Intemational Standard IS0 4957:1999 has been prepared by Technical Committee ISOTTC 17 “Steel” in collaboration with Technical Committee ECISSTTC 23 “Steels for heat treatment, alloy steels and
15、free-cutting steels - Qualities and dimensions”, 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 June 2000, and conflicting national standards shall be wit
16、hdrawn at the latest by June 2000. According to the CENKENELEC 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, Lu
17、xembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. NOTE FROM CEWCS: The foreword is susceptible to be amended on reception of the German language version. The confirmed or amended foreword, and when appropriate, the normative annex ZA for the references to in
18、ternational publications with their relevant European publications will be circulated with the German version. Endorsement notice The text of the International Standard IS0 4957:1999 was approved by CEN as a European Standard without any modification. STD-BSI 8s EN IS0 4957-ENGL 2000 Lb24bbel 083354
19、0 006 EN IS0 4957:1999 INTERNATIONAL STANDARD IS0 4957 Second edition 1999-1 2-1 5 Tool steels Aciers a outils Reference number IS0 4957:1999(E) STDOBSI BS EN IS0 4957-ENGL 2000 lb24bb9 0833543 T42 D EN IS0 4957:1999 Contents 1 Scope 1 2 Normative references 1 3 Terms and definitions . 2 4 Requireme
20、nts . 3 5 Inspection, testing and conformance of products . 4 6 Marking . 5 7 Ordering and designation . 5 Annex A (informative) Hardness-tempering temperature-curves 18 Annex B (normative) Supplementary or special requirements 28 Annex C (informative) Designations of comparable steels . 30 Bibliogr
21、aphy 32 STD*BSI BS EN IS0 4957-ENGL 2000 9 Lb24bb9 0833542 989 EN IS0 4967:1999 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through
22、IS0 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, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates
23、 closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circul
24、ated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. IS0 shall not be
25、held responsible for identifying any or all such patent rights. International Standard IS0 4957 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 4, Heat treatable and alloy steels. This second edition cancels and replaces the first edition (IS0 4957:1980) which has been technica
26、lly revised. Annex B forms a normative pari of this International Standard, annexes A and C are for information only. iv STD-BSI BS EN IS0 4957-ENGL 2000 H 3b24bb9 0833543 835 EN IS0 4957:1999 Tool steels 1 Scope 1.1 This International Standard covers the following grades of wrought tool steels: a)
27、non-alloy cold-work tool steels; b) alloy cold-work tool steels; c) alloy hot-work tool steels: d) high-speed tool steels. If not stated otherwise, this International Standard applies to all types of hot-rolled, forged, cold-drawn or cold-rolled products which are supplied in one of the surface and
28、heat-treatment conditions given in 4.1.2 and Table 1. Products according to this International Standard may be produced by powder metallurgy. NOTE 1 The Tables 2, 4, 6 and 8 cover only those steels which have gained certain international importance, which does not mean however, that they are availab
29、le in all industrial countries. In addition, a number of other steels for tools are specified in regional, national or company standards. NOTE 2 glass, the material selection should be based on IS0 4955 or IS0 9722. Where the heat resistance of the tools is of particular importance, as for example i
30、n the case of tools for hot forming 1.2 applicable. In addition to this International Standard, the general technical delivery requirements of IS0 404 are 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this
31、International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative doc
32、uments indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IS0 and IEC maintain registers of currently valid International Standards. IS0 377:1997, Steel and steel products - Location and preparation of samples and test pieces for mec
33、hanical testing. IS0 404:1992, Steel and steel products - General technical delivery requirements. IS0 1035-1 :1980, Hot-rolled steel bars - fart 7: Dimensions of round bars. IS0 1035-3: 1980, Hot-rolled steel bars - Part 3: Dimensions of flat bars. IS0 1035-4: 1 982, Hot-rolled steel bars - Part 4:
34、 Tolerances. 1 STD-BSI BS EN IS0 4957-ENCL 2000 m 3624bb9 0833544 753 m EN IS0 4967:1999 IS0 4948-1 :1982, Steels - Classification - Part 1: Classification of steels into unalloyed and alloy steels based on chemical composition. IS0 6506:19811), Metallic materials - Hardness test - Brinell test. IS0
35、 6508:l 9862), Metallic materials - Hardness test - ockwell test (scales A - B - C - D - E - F - G - H - K). IS0 6929:1987, Steel products - Definitions and classification. ISOiTR 9769:1991, Steel and iron - Review of available methods of analysis. IS0 10474:1991, Steel and steel products - Inspecti
36、on documents. IS0 14284:1996, Steel and iron - Sampling and preparation of samples for the determination of chemical composition. 3 Terms and definitions For the purposes of this International Standard, the terms and definitions given in IS0 4948-1 and IS0 6829 as well as the following apply. 3.1 pr
37、oduct forms IS0 69291 3.2 unalloyed and alloyed steel IS0 4948-11 3.3 tool steels special steels suitable for working or processing of materials, for handling and measuring workpieces and, for this purpose, exhibiting high hardness and wear resistance and/or toughness 3.3.1 cold-work tool steels non
38、-alloy or alloy tool steels for applications in which the surface temperature is generally below 200 “C 3.3.2 hot-work tool steels alloy tool steels for applications in which the surface temperature is generally over 200 “C 3.3.3 high-speed tool steels steels used mainly for machining and for formin
39、g processes and which, because of their chemical composition, have the highest high-temperature hardness and temper resistance up to about 600 “C 1) To be replaced by IS0 6506-1, IS0 6506-2 and IS0 6506-3. 2) To be replaced by IS0 6508-1, IS0 6508-2 and IS0 6508-3. 2 STDeBSI BS EN IS0 4957-ENGL 2000
40、 - Lb24bbq 0833545 bqa EN IS0 4957:1999 4 Requirements 4.1 Manufact u ring process 4.1.1 General The manufacturing process of the steel and the products is left to the discretion of the manufacturer, with the restrictions given in 4.1.2. When he so requests, the purchaser shall be informed what stee
41、l making process is being used. 4.1.2 Heat-treatment condition and surface condition on delivery The heat-treatment and surface conditions of the products shall comply with the agreements when ordering. 4.1.2.1 Heat-treatment condition The heat-treatment conditions are given in Table 1. Unless other
42、wise specified in the order, the tool steels (except C45U, Table 2, 35CrMo7, X38CrMo16 and 40CrMnNiMo8-6-4, Table 4, 55NiCrMoV7, Table 6) are delivered in the annealed condition. 4.1.2.2 Surface condition Usual surface conditions are: a) the hot-rolled or forged condition ( = as hot worked); b) the
43、machined (ground, polished, turned, peeled or milled) condition; c) the cold-reduced condition. 4.2 Chemical composition and mechanical properties 4.2.1 according to Tables 2 to 9 (chemical composition, hardness). Table 1 gives a survey of combinations of usual heat-treatment conditions at delivery
44、and requirements 4.2.2 For hardness-tempering temperature-curves of the steels see annex A. 4.2.3 For hardness penetration depth of non-alloy cold-work tool steels, see Table 2, footnote d. 4.3 Surface quality 4.3.1 have an adverse effect on their processing or designated application. All products s
45、hall have a workmanlike finish and shall be clean and free from surface imperfections likely to 4.3.2 decarburization. Ground, polished or finished-machined products shall be free from surface imperfections and surface 4.3.3 removed from all surfaces by machining or grinding to allow for Hot-rolled,
46、 forged, cold-drawn or rough-machined products shall be ordered with sufficient material to be a) surface decarburization and b) surface imperfections. 3 STD-BSI BS EN IS0 4957-ENGL 2000 M Lb24669 0833546 524 M EN IS0 4957:1999 As long as no International Standard for the machining allowances of too
47、l steels is available, the allowances shall be agreed at the time of enquiry and order. 4.4 Shape, dimensions and tolerances The shape, dimensions and tolerances of the products shall comply with the requirements agreed upon at the time of enquiry and order. The agreements shall, as far as possible,
48、 be based on corresponding International Standards or otherwise, on suitable national standards. For rolled flat and round bars, the following International Standards cover dimensions and/or tolerances for products included in this International Standard: IS0 1035-1, IS0 1035-3 and IS0 1035-4. NOTE
49、By agreement, the tolerances can be all plus or other disposition than equal plus/minus. 5 Inspection, testing and conformance of products 5.1 Inspection and testing procedures and types of inspection documents 5.1.1 upon at the time of enquiry and order. For each delivery, the issue of any inspection document in accordance with IS0 10474 may be agreed 5.1.2 this shall cover: If, in accordance with the agreements made at the time of enquiry and order, a test report is to be provided, a) the statement that the material complies with the requirements of the order; b) the result
