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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 10277-4:1999 The Eu
2、ropean Standard EN 10277-4:1999 has the status of a British Standard ICS 77.140.60 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Bright steel products Technical delivery conditions Part 4: Case-hardening steels This British Standard, having been prepared under the direction
3、of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 December 1999 BSI 12-1999 ISBN 0 580 32836 8 BS EN 10277-4:1999 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the Englis
4、h language version of EN 10277-4:1999. This part of BS EN 10277 together with BS EN 10278 and BS EN 10277 parts 1, 2, 3 and 5 supersedes BS 970-3:1991 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/31, Wrought steels, which has the responsibility
5、 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 re
6、presented on this committee can be obtained on request to its secretary. Cross-references The 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 Correspon
7、dence 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 it
8、self confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. CEN European Committee for St
9、andardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10277-4:1999 E EUROPEAN STANDARDEN 102
10、77-4 NORME EUROPE ENNE EUROPA ISCHE NORM July 1999 ICS 77.140.20; 77.140.60 English version Bright steel products Technical delivery conditions Part4: Case-hardening steels Produits en acier transforme s a froid Conditions techniques de livraison Partie 4: Aciers pour ce mentation Blankstahlerzeugni
11、sse Technische Lieferbedingungen Teil 4: Einsatzsta hle This European Standard was approved by CEN on 11 June 1999. 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
12、 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 language made by
13、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, Germany, Greece, Iceland, Irel
14、and, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 10277-4:1999 BSI 12-1999 Foreword This European Standard has been prepared by Technical Committee ECISS/TC 23, Steels for heat treatment, alloy steels and free-cutting steels Qualities and
15、 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 January 2000, and conflicting national standards shall be withdrawn at the latest by January 2
16、000. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This European Standard is considered to be a supporting standard to those applications and product standards which in themselves support an essential safety
17、requirement of a New Approach Directive and which make reference to this European Standard. This European Standard EN 10277, Bright steel products Technical delivery conditions, is subdivided as follows: Part 1: General; Part 2: Steels for general engineering purposes; Part 3: Free-cutting steels; P
18、art 4: Case-hardening steels; Part 5: Steels for quenching and tempering. According 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, Germ
19、any, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 4Classification and designation3 4.1Classification3 4.2Designation3 5Information to be supplied by
20、the purchaser3 6Manufacturing process3 7Requirements3 7.1Chemical composition3 7.2Mechanical properties3 7.3Hardenability3 7.4Grain size3 7.5Non-metallic inclusions3 7.6Supplementary or special requirements3 8Inspection and testing3 9Marking3 Page 3 EN 10277-4:1999 BSI 12-1999 1) It may be agreed at
21、 the time of ordering, until this EURONORM has been adopted as a European Standard, that either this EURONORM or a corresponding national standard should be applied. 1 Scope 1.1 This part of EN 10277 applies to bright steel bars in the drawn, turned or ground condition, in straight lengths of case-h
22、ardening steels. 1.2 This EN 10277-4 is complemented by EN 10277-1. 2 Normative references This 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
23、 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 10084:1998, Case-hardening
24、steels Technical delivery conditions. EN 10277-1, Bright steel products Technical delivery conditions Part 1: General. EURONORM 1031), Microscopic determination of the ferritic or austenitic grain size of steels. 3 Definitions For the purpose of this standard, the following definition applies in add
25、ition to the definitions in EN 10277-1. 3.1 case-hardening steels steels with a relatively low carbon content, which are intended for carburizing or carbonitriding and subsequent hardening. Such steels, after treatment, are characterized by a high hardness surface layer and a tough core 4 Classifica
26、tion and designation 4.1 Classification Steel grades C10R, C15R and C16R are non-alloy special steels. All other steel grades covered by this European Standard are alloy special steels. 4.2 Designation See EN 10277-1. 5 Information to be supplied by the purchaser See EN 10277-1. 6 Manufacturing proc
27、ess See EN 10277-1. 7 Requirements 7.1 Chemical composition 7.1.1 Cast analysis The chemical composition of the steel according to the cast analysis shall be as specified in Table 1. 7.1.2 Product analysis The permissible deviations from the chemical composition as specified in Table 1 for cast anal
28、ysis and the product analysis of the steel shall be as specified in Table 2. 7.2 Mechanical properties The mechanical properties of the steels shall be as specified in Table 3 and Table 4. 7.3 Hardenability Where steels are ordered with hardenability requirements, the requirements of EN 10084 shall
29、apply. 7.4 Grain size Unless otherwise agreed, the steel when tested in accordance with one of the methods described in EURONORM 103 shall show an austenitic grain size of 5 to 8. The grain structure shall be considered satisfactory if 70 % of the area is within the specified size limits. For verifi
30、cation see EN 10277-1, B.2. 7.5 Non-metallic inclusions The steels shall have a degree of cleanness corresponding to the special steel quality. For details of requirements and verification see A.1 and annex D of EN 10084:1998. 7.6 Supplementary or special requirements See annex B of EN 10277-1. 8 In
31、spection and testing See EN 10277-1. 9 Marking See EN 10277-1. BSI 12-1999 Page 4 EN 10277-4:1999 Table 1 Steel grades and chemical composition (cast analysis) DesignationSteel grade according to Chemical composition, % by mass1),2),3) Steel nameSteel number CSi max. MnP max. SCrMoNiB C10R1.1207EN 1
32、0084:19980,07 to 0,130,400,30 to 0,600,0350,020 to 0,040 C15R1.1140EN 10084:19980,12 to 0,180,400,30 to 0,600,0350,020 to 0,040 C16R1.1208EN 10084:19980,12 to 0,180,400,60 to 0,900,0350,020 to 0,040 16MnCrS51.7139EN 10084:19980,14 to 0,190,401,00 to 1,300,0350,020 to 0,0400,80 to 1,10 16MnCrB51.7160
33、EN 10084:19980,14 to 0,190,401,00 to 1,300,035#0,0350,80 to 1,100,0008 to 0,00504) 20MnCrS51.7149EN 10084:19980,17 to 0,220,401,10 to 1,400,0350,020 to 0,0401,00 to 1,30 16NiCrS41.5715EN 10084:19980,13 to 0,190,400,70 to 1,000,0350,020 to 0,0400,60 to 1,000,80 to 1,10 15NiCr131.5752EN 10084:19980,14
34、 to 0,200,400,40 to 0,700,035#0,0350,60 to 0,903,00 to 3,50 20NiCrMoS2-2 1.6526EN 10084:19980,17 to 0,230,400,65 to 0,950,0350,020 to 0,0400,35 to 0,70 0,15 to 0,25 0,40 to 0,70 17NiCrMoS6-4 1.6569EN 10084:19980,14 to 0,200,400,60 to 0,900,0350,020 to 0,0400,80 to 1,100,15 to 0,251,20 to 1,50 1) Ele
35、ments not quoted in this table shall not be intentionally added to the steel without the agreement of the purchaser, other than for the purpose of finishing the heat. All reasonable precautions shall be taken to prevent the addition from scrap or other material used in manufacture, of such elements
36、which affect the hardenability, mechanical properties and applicability. 2) Where requirements are made on hardenability (see EN 10084), slight deviations from the limits for the cast analysis are permitted, except for phosphorus and sulfur; these deviations shall, however, not exceed in the case of
37、 carbon0,01 % and in all other cases the values acc. to Table 2. 3) Steels with improved machinability as a result of the addition of lead (e.g. 0,15 % Pb to 0,35 % Pb) or higher sulfur contents, depending on the manufacturing process up to around 0,100 % S (including controlled sulfide and oxide fo
38、rmation, e.g. calcium treatment), may be supplied on request. In this case, the upper limit of the manganese content may be increased by 0,15 %. 4) Boron is in this case added not for increase of hardenability but to improve the toughness of the case hardened zone. Page 5 EN 10277-4:1999 BSI 12-1999
39、 Table 2 Permissible deviations between the product analysis and the limiting values given in Table 1 for the cast analysis ElementPermissible maximum content in the cast analysis Permissible deviation1) % by mass% by mass C#0,23 0,02 Si#0,40+0,03 Mn#1,00 0,04 1,00 #1,40 0,05 P#0,035+0,005 S#0,040+0
40、,0052) Cr#1,30 0,05 Mo#0,25 0,03 Ni#2,00 0,05 2,00 #3,50 0,07 B#0,005 0 0,000 5 1) means that in one cast the deviation may occur over the upper value or under the lower value of the specified range in Table 1, but not both at the same time. 2) For steels with a specified sulfur range (0,020 % to 0,
41、040 % according to cast analysis), the permissible deviation is0,005 %. BSI 12-1999 Page 6 EN 10277-4:1999 Table 3 Mechanical properties of non-alloy steels DesignationThickness1) mm Mechanical properties1) Steel nameSteel numberAs rolled + turned (+SH)Cold drawn (+C)+A3)+ turned (+A +SH) +A3) +cold
42、 drawn (+A +C) Hardness HB Rm N/mm2 Rp0,22) N/mm2 Rm2) N/mm2 A5 % Hardness HB Hardness4) HB min.min.max.max. C10R1.1207$5 #10350460 to 7608225 10 #16300430 to 7309216 16 #4092 to 163310 to 550250400 to 70010131207 40 #6392 to 163310 to 550200350 to 64012131190 63 #10092 to 163310 to 550180320 to 580
43、12131172 C15R1.1140$5 #10380500 to 8007238 10 #16340480 to 7808231 16 #4098 to 178330 to 600280430 to 7309143216 40 #6398 to 178330 to 600240380 to 67011143198 63 #10098 to 178330 to 600215340 to 60012143178 C16R1.1208$5 #10400520 to 8207242 10 #16360500 to 8008238 16 #40105 to 184350 to 620300450 t
44、o 7509156222 40 #63105 to 184350 to 620260400 to 69011156204 63 #100105 to 184350 to 620235360 to 62012156184 1) For thicknesses 10 #16250 16 #40207245140 to 187140 to 240 40 #63207240140 to 187140 to 235 63 #100207240140 to 187140 to 235 16MnCrB51.7160$5 #10260 10 #16250 16 #40207245140 to 187140 t
45、o 240 40 #63207240140 to 187140 to 235 63 #100207240140 to 187140 to 235 20MnCrS51.7149$5 #10270 10 #16260 16 #40217255152 to 201152 to 250 40 #63217250152 to 201152 to 245 63 #100217250152 to 201152 to 245 16NiCrS41.5715$5 #10270 10 #16260 16 #40217255156 to 207156 to 245 40 #63217255156 to 207156
46、to 240 63 #100217255156 to 207156 to 240 15NiCr131.5752$5 #10 10 #16 16 #40255166 to 217 40 #63255166 to 217 63 #100255166 to 217 20NiCrMoS2-21.6526$5 #10270 10 #16260 16 #40212255149 to 194149 to 240 40 #63212255149 to 194149 to 235 63 #100212255149 to 194149 to 235 17NiCrMoS6-41.6569$5 #10275 10 #
47、16265 16 #40229260149 to 201149 to 250 40 #63229255149 to 201149 to 245 63 #100229255149 to 201149 to 245 1) For thicknesses 5 mm the mechanical properties may be agreed at the time of enquiry and order. 2) +A = annealed to maximum hardness requirement. 3) +FP = treated to ferrite-pearlite structure
48、 and hardness range. 4) The hardness values for flats may deviate by10 %. BS EN 10277-4:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
49、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest