BS-EN-10325-2006.pdf
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1、BRITISH STANDARD BS EN 10325:2006 Steel Determination of yield strength increase by the effect of heat treatment Bake-Hardening-Index The European Standard EN 10325:2006 has the status of a British Standard ICS 77.040.10; 71.080.20 ? BS EN 10325:2006 This British Standard was published under the aut
2、hority of the Standards Policy and Strategy Committee on 29 September 2006 BSI 2006 ISBN 0 580 48971 X National foreword This British Standard was published by BSI. It is the UK implementation of EN 10325:2006. The UK participation in its preparation was entrusted by Technical Committee ISE/NFE/4, M
3、echanical testing of metals, to Subcommittee ISE/NFE/4/1, Uniaxial testing of metals. A list of organizations represented on ISE/NFE/4/1 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
4、 correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10325 August 2006 ICS 77.040.10; 71.080.20 English Version Steel - Determination of y
5、ield strength increase by the effect of heat treatment Bake-Hardening-Index Aciers - Dtermination de laugmentation de la limite apparente dlasticit due un traitement thermique (index de durcissement la cuisson Bake-hardening) Stahl - Bestimmung der Streckgrenzenerhhung durch Wrmebehandlung (Bake-Har
6、dening-Index) This European Standard was approved by CEN on 7 July 2006. 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 alteration. Up-to-date lists and bibliogra
7、phical 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 translation under the responsibility of a C
8、EN 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvi
9、a, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Bruss
10、els 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10325:2006: E EN 10325:2006 (E) 2 Contents Foreword3 1 Scope 4 2 Normative references4 3 Terms and definitions .4 4 Symbols and designations.6 5 Principle6 6 Test equipment 6
11、7 Test pieces .6 8 Testing procedure6 8.1 Testing conditions.6 8.2 Heat treatment conditions 6 8.3 Determination of Bake-Hardening-Index (BH2) .7 9 Test report7 EN 10325:2006 (E) 3 Foreword This document (EN 10325:2006) has been prepared by Technical Committee ECISS/TC 1 “Steel - Mechanical testing”
12、, the secretariat of which is held by AFNOR. 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 February 2007, and conflicting national standards shall be withdrawn at the latest by February 2007. Ac
13、cording to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lith
14、uania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 10325:2006 (E) 4 1 Scope This document specifies the method for the determination of yield strength increase by the effect of heat treatment (Bake-Hardening
15、-Index) for steel. NOTE This test is applied in particular, to steels showing a mechanism of bake hardening, which are specially intended for automotive industry. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, o
16、nly the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10002-1:2001, Metallic materials Tensile testing Part 1: Method of test at ambient temperature 3 Terms and definitions For the purposes of this document, the te
17、rms and definitions given in EN 10002-1:2001 and the following apply. NOTE However it should be noted that in the context of this document, the term “yield strength“ also covers 0,2 % proof strength in addition to its definition in EN 10002-1. 3.1 Bake-Hardening-Index (BH2) increase of yield strengt
18、h between a reference condition after a 2 % plastic pre-strain and the condition obtained after a heat treatment simulating the usual industrial paint processes (see Figure 1) NOTE The heat treatment of simulation is specified in 8.2. EN 10325:2006 (E) 5 Key 1 Stress 2 Strain 3 Application of a 2 %
19、plastic pre-strain 4 Tensile test after heat treatment on the same test piece Figure 1 Illustration of the determination of BH2 EN 10325:2006 (E) 6 4 Symbols and designations The symbols used in this document and the corresponding designations are given in Table 1. Table 1 Symbols and designations S
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