BS-EN-10277-4-2008.pdf
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1、BRITISH STANDARD BS EN 10277-4:2008 Bright steel products Technical delivery conditions Part 4: Case hardening steels ICS 77.140.20; 77.140.60 ? BS EN 10277-4:2008 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008 ISBN 97
2、8 0 580 52928 3 National foreword This British Standard is the UK implementation of EN 10277-4:2008. It supersedes BS EN 10277-4:1999 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/31, Wrought steels. A list of organizations represented on this c
3、ommittee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda is
4、sued since publication DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10277-4 March 2008 ICS 77.140.20; 77.140.60Supersedes EN 10277-4:1999 English Version Bright steel products - Technical delivery conditions - Part 4: Case hardening steels Produits en acier transforms froid - Co
5、nditions techniques de livraison - Partie 4: Aciers pour cmentation Blankstahlerzeugnisse - Technische Lieferbedingungen - Teil 4: Einsatzsthle This European Standard was approved by CEN on 4 February 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the
6、 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 standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists i
7、n 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 CEN Management Centre has the same status as the official versions. CEN members are the national standards bodie
8、s of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EURO
9、PEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10277-4:2008: E EN 10277-4:
10、2008 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references4 3 Terms and definitions .4 4 Classification and designation.4 4.1 Classification4 4.2 Designation 4 5 Information to be supplied by the purchaser .4 6 Manufacturing process .4 7 Requirements.5 7.1 Chemical composition 5 7.2 Mechani
11、cal properties.5 7.3 Hardenability5 7.4 Grain size5 7.5 Non-metallic inclusions 5 7.6 Options .5 8 Inspection and testing.5 8.1 Types and contents of inspection documents .5 8.2 Specific inspection5 8.3 Verification of hardenability .6 9 Marking.6 BS EN 10277-4:2008 EN 10277-4:2008 (E) 3 Foreword Th
12、is document (EN 10277-4:2008) 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. This European Standard shall be given the status of a national standard, either by
13、 publication of an identical text or by endorsement, at the latest by September 2008, and conflicting national standards shall be withdrawn at the latest by September 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/o
14、r CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 10277-4:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria,
15、Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. This European
16、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; Part 4: Case hardening steels; Part 5: Steels for quenching and tempering. During the preparation of the fi
17、rst edition of this European Standard there were not enough statistical data available concerning mechanical properties of bright bar products. Since then it has been recognized that the proof strength values in the cold drawn condition were too high. In addition, cyclic stresses that occur during s
18、traightening can reduce the proof strength (Bauschingers effect), which was not taken into account when drafting the first edition of this standard. In this second edition the proof strength values of non-alloy and alloy grades in condition +QT+C in parts 3 and 5 have been adjusted downwards compare
19、d to the first edition. BS EN 10277-4:2008 EN 10277-4:2008 (E) 4 1 Scope This part of EN 10277 applies to bright steel bars in the drawn, turned or ground condition, in straight lengths of case hardening steels. This EN 10277-4 is complemented by EN 10277-1. 2 Normative references The following refe
20、renced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10084, Case hardening steels - Technical delivery conditions EN
21、10277-1, Bright steel products - Technical delivery conditions - Part 1: General 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 10277-1 and the following apply. 3.1 case hardening steels steels with a relatively low carbon content, which are
22、 intended for carburising or carbonitriding and subsequent hardening. Such steels, after treatment, are characterised by a high hardness surface layer and a tough core. 4 Classification and designation 4.1 Classification Steel grades C10R, C15R and C16R are non-alloy special steels. All other steel
23、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 process See EN 10277-1. BS EN 10277-4:2008 EN 10277-4:2008 (E) 5 7 Requirements 7.1 Chemical composition 7.1.1 Cast analysi
24、s 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 analysis and the product analysis of the steel shall be as specified in Table 2. 7
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