1、DEUTSCHE NORM February 2001 DIN EN IS0 4957 - Tool steels (IS0 4957 : 1999) English version of DIN EN IS0 4957 ICs 77.140.35 Werkzeugstahle (IS0 4957 : 1999) Supersedes DIN 17350 and Supplement 1 to DIN 17350, October 1980 editions. European Standard EN IS0 4957 : 1999 has the status of a DIN Standa
2、rd. A comma is used as the decimal marker. National foreword This standard has been published in accordance with a decision taken by ECISS/TC 23 to adopt, without alteration, International Standard IS0 4957 as a European Standard. The responsible German body involved in its preparation was the Norme
3、nausschuss Eisen und Stahl (Steel and Iron Standards Committee), Technical Committee Werkzeugstahle. The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are as follows: IS0 Standard DIN Standard(s) IS0 377 DIN EN IS0 377 IS0 404 DIN EN 10021 IS0 1035-1 DI
4、N EN 10060*) IS0 1035-3 DIN EN 10058*) IS0 1035-4 DIN EN 10058*) and DIN EN 10060*) IS0 4948-1 DIN EN 10020 IS0 6506 IS0 6508 DIN EN IS0 6506-1 DIN EN IS0 6508-1 IS0 6929 DIN EN 10079 IS0 10474 DIN EN 10204 Amendments DIN 17350 and Supplement 1 to DIN 17350, October 1980 editions, have been supersed
5、ed by the specifi- cations of EN IS0 4957, which is identical to IS0 4957. Previous editions DIN 17350: 1980-1 O; Supplement 1 to DIN 17350: 1980-1 O. *) Currently at draft stage. Continued overleaf. EN comprises 33 pages. No part of this standard may be reproduced without the prior permission of Re
6、f. No. DIN EN IS0 4957 : 2001 -02 IN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, as the exclusive right of sale for German Standards (DIN-Normen). English price group 15 Sales No. 11 15 07.01 Page 2 DIN EN IS0 4957 : 2001 -02 National Annex NA Standards ref
7、erred to (and not included in Normative references, Bibliography and Annex ZA) DIN EN 10020 DIN EN 10021 DIN EN 10058 DIN EN 10060 DIN EN 10079 DIN EN 10204 DIN EN IS0 377 DIN EN IS0 6506-1 DIN EN IS0 6508-1 Definition and classification of steel General technical delivery conditions for steel and i
8、ron products Hot-rolled steel bars - Dimensions of flat bars*) Hot-rolled steel bars - Dimensions of round bars*) Definition of steel products Inspection documents for metallic products (includes Amendment A 1 : 1995) Steel and steel products - Location and preparation of samples and test pieces for
9、 mechanical testing (IS0 377 : 1997 + Corr 1 : 1997) Metallic materials - Brinell hardness test - Part 1 : Test method (IS0 6506-1 : 1999) Metallic materials - Rockwell hardness test - Part 1 : Test method (scales A, B, C, D, E, F, G, H, K, N, T) (ISO6508-1 : 1999) *) Currently at draft stage. EUROP
10、EAN 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 : 1999) Aciers outils (IS0 4957 : 1999) Werkzeugstahle (IS0 4957 : 1999) This European Standard was approved by CEN on 1999-1 2-1 5. CEN members are bound
11、to comply with the CENKENELEC 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 stand- ards may be obtained on application to the Cen
12、tral Secretariat or to any CEN member. The European Standards exist 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 has the same status as
13、the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee
14、for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1999. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN IS0 4957 : 1999 E Page 2 EN IS0 49
15、57: 1999 Foreword International Standard IS0 4957 : 1999 Tool steels, which was prepared by ISO/TC 17 Steel of the International Organization for Standardization, has been adopted by Technical Committee ECISS/TC 23 Steels for heat treatment, alloy steels and free-cutting steels - Qualities and dimen
16、sions, the Secretariat of which is held by DIN, as a European Standard. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, and conflicting national standards withdrawn, by June 2000 at the latest. In accordance with
17、the CENKENELEC Internal Regulations, the national standards organizations of the follow- ing countries are bound to implement this European Standard: Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portuga
18、l, Spain, Sweden, Switzerland, and the United Kingdom. Endorsement notice The text of the International Standard IS0 4957 : 1999 was approved by CEN as a European Standard without any modification. NOTE: Normative references to international publications are listed in Annex ZA (normative). Contents
19、1 Scope 3 2 Normative references 3 3 Terms and definitions . 4 4 Requirements . 5 5 Inspection, testing and conformance of products . 6 6 Marking . 7 7 Ordering and designation . 7 Annex A (informative) Hardness-tempering temperature-curves 20 Annex B (normative) Supplementary or special requirement
20、s 30 Annex C (informative) Designations of comparable steels . 32 Bibliography 33 Page 3 EN IS0 4957: 1999 1 Scope 1.1 This International Standard covers the following grades of wrought tool steels: a) non-alloy cold-work tool steels; b) alloy cold-work tool steels; c) alloy hot-work tool steels; d)
21、 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 heat-treatment conditions given in 4.1.2 and Table 1. Products according to this International Sta
22、ndard 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 available in all industrial countries. In addition, a number of other steels for tools are specified in r
23、egional, 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 in the case of tools for hot forming 1.2 applicable. In addition to this International Standard, th
24、e 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 International Standard. For dated references, subsequent amendments to, or revisions of, any of th
25、ese 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 documents indicated below. For undated references, the latest edition of the normative document refer
26、red 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 mechanical testing. IS0 404:1992, Steel and steel products - General technical delivery requirements.
27、 IS0 1035-1:1980, Hot-rolled steel bars - Part 7: Dimensions of round bars. IS0 1035-3:1980, Hot-rolled steel bars - Part 3: Dimensions of flat bars. IS0 1035-4:1982, Hot-rolled steel bars - Part 4: Tolerances. Page 4 EN IS0 4957: 1999 IS0 4948-1 : 1982, Steels - Classification - Pari 1: Classificat
28、ion of steels into unalloyed and alloy steels based on chemical cornposition. IS0 6506:1981 I), Metallic materials - Hardness test - Brinell test. IS0 6508:19862), Metallic materials - Hardness test - Rockwell test (scales A - B - C - D - E - F - G - H - K). IS0 6929:1987, Steel products - Definitio
29、ns and classification. ISO/TR 9769:1991, Steel and iron - Review of available methods of analysis. IS0 10474: 1 991, Steel and steel products - Inspection documents. IS0 14284:1996, Steel and iron - Sampling and preparation of samples for the determination of chemical composition. 3 Terms and defini
30、tions 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 product 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, fo
31、r 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-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
32、 for applications in which the surface temperature is generally over 200 OC 3.3.3 high-speed tool steels steels used mainly for machining and for forming processes and which, because of their chemical composition, have the highest high-temperature hardness and temper resistance up to about 600 “C 1)
33、 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. Page 5 EN IS0 4957: 1999 4 Requirements 4.1 Manufacturing process 4.1.1 General The manufacturing process of the steel and the products is left to the discretion of the manufacturer,
34、 with the restrictions given in 4.1.2. When he so requests, the purchaser shall be informed what steel 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 orderi
35、ng. 4.1.2.1 Heat-treatment condition The heat-treatment conditions are given in Table 1. Unless otherwise 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 cond
36、ition Usual surface conditions are: a) the hot-rolled or forged condition ( = as hot worked); b) the 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 compositi
37、on, hardness). 4.2.2 Table 1 gives a survey of combinations of usual heat-treatment conditions at delivery and requirements 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 Surfa
38、ce quality 4.3.1 have an adverse effect on their processing or designated application. 4.3.2 decarburization. All products shall have a workmanlike finish and shall be clean and free from surface imperfections likely to Ground, polished or finished-machined products shall be free from surface imperf
39、ections and surface 4.3.3 removed from all surfaces by machining or grinding to allow for Hot-rolled, forged, cold-drawn or rough-machined products shall be ordered with sufficient material to be a) surface decarburization and b) surface imperfections. Page 6 EN IS0 4957: 1999 As long as no Internat
40、ional Standard for the machining allowances of tool 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 an
41、d order. The agreements shall, as far as possible, 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 Stan
42、dard: IS0 1035-1, IS0 1035-3 and IS0 1035-4. NOTE By agreement, the tolerances can be all plus or other disposition than equal plus/minus. 5 Inspection, testing and conformance of products 5.1 5.1.1 upon at the time of enquiry and order. 5.1.2 this shall cover: Inspection and testing procedures and
43、types of inspection documents For each delivery, the issue of any inspection document in accordance with IS0 10474 may be agreed 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 requirem
44、ents of the order; b) the results of the cast analysis for all elements specified for the type of steel supplied. 5.1.3 If, in accordance 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 IS0 10474) is to be provided, the specific i
45、nspections and tests described in 5.2 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 for the steel type concerned: b) the results of all inspec
46、tions and tests ordered by supplementary requirements (see annex B); c) the symbol letters of numbers connecting the inspection documents, the test pieces and products to each other. 5.2 Specific inspection and testing 5.2.1 Number of sample products 5.2.1.1 Chemical composition The cast analysis is
47、 given by the manufacturer. For product analysis see 8.2 in annex B. 5.2.1.2 Mechanical properties One sample product per test unit shall be tested. 5.2.1.2.1 condition, the test unit shall consist of products from the same cast and the same heat-treatment batch. For material delivered in the anneal
48、ed or annealed and cold rolled or annealed and cold drawn Page 7 EN IS0 4957: 1999 In the case of material heat treated in a continuous furnace, a heat-treatment batch is regarded as that quantity of products (of the same cast and dimensions) which without any interruptions, was under constant treat
49、ment conditions (same furnace temperature, atmosphere and transportation speed) through the furnace. 5.2.1.2.2 from the same cast, heat-treatment and thickness. For material delivered in the quenched and tempered condition, the test unit shall consist of products However, if the manufacturer verifies that the thickness has no significant effect on the hardness in the quenched and tempered condition, then different thicknesses may be covered in a test unit. 5.2.1.3 Inspection of the surface quality Unless otherwise agreed when ordering (see B.5), the number of products to be in
