1、BRITISH STANDARD BS EN 10268:2006Cold rolled steel flat products with high yield strength for cold forming Technical delivery conditionsICS 77.140.50nullnull nullnullnullnullnullnullnull nullnullnullnullnullnullnull nullnullnull nullnullnullnullnullnullnullnullnullnull nullnullnullnullnullnull nulln
2、ull nullnullnullnullnullnullnullnullnull nullnull nullnullnullnullnullnullnullnullnull nullnullnull+A1:2013National forewordThis British Standard is the UK implementation of EN 10268:2006+A1:2013. It supersedes BS EN 10268:2006 which is withdrawn.The start and finish of text introduced or altered by
3、 amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by .The UK participation in its preparation was entrusted to Technical Committee ISE/109, Coated and Uncoated Flat Produc
4、ts to be Used for Cold Forming.A list of organizations represented on ISE/109 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 cann
5、ot confer immunity from legal obligations.BS EN 10268:2006+A1:2013This British Standard waspublished under the authorityof the Standards Policy andStrategy Committeeon 29 September 2006 The British Standards Institution 2013. Published by BSI Standards Limited 2013Amendments/corrigenda issued since
6、publicationDate Comments 30 November 2013 Implementation of CEN amendment A1:2013ISBN 978 0 580 76372 4EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10268:2006+A1 September 2013 ICS 77.140.50 English Version Cold rolled steel flat products with high yield strength for cold forming - Technical
7、 delivery conditions Produits plats lamins froid haute limite dlasticit pour formage froid - Conditions techniques de livraison Kaltgewalzte Flacherzeugnisse aus Sthlen mit hoher Streckgrenze zum Kaltumformen - Technische Lieferbedingungen This European Standard was approved by CEN on 12 June 2006 a
8、nd includes Amendment 1 approved by CEN on 5 July 2013. 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 bibliographical references
9、 concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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 memb
10、er into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Fra
11、nce, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES K
12、OMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10268:2006+A1:2013: E EN 10268:2006+A1:2013 (E) 2 Foreword This document (EN 10268:2006+A1:2013) has been p
13、repared by Technical Committee ECISS/TC 109 “Coated and uncoated flat products to be used for cold forming”, 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
14、 by March 2014, and conflicting national standards shall be withdrawn at the latest by March 2014. !Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such p
15、atent rights.“ This document includes Amendment 1 approved by CEN on 5 July 2013. This document supersedes !EN 10268:2006“. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. According to the CEN/CENELEC Internal Regulations, the national standards o
16、rganisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembou
17、rg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 10268:2006+A1:2013EN 10268:2006+A1:2013 (E) 3 Contents Page 1 Scope 4 2 Normative references 4 3 Terms and definitions . 5 4 Designation 5 5 Requirements .
18、6 5.1 Steelmaking and manufacturing processes . 6 5.2 Chemical composition 6 5.3 Delivery conditions 6 5.4 Mechanical properties . 7 5.5 Surface characteristics . 9 5.5.1 General 9 5.5.2 Surface quality . 9 5.5.3 Surface finish . 9 5.5.4 !Freedom from stretcher strains“ . 10 5.6 Suitability for surf
19、ace coating 10 5.7 Weldability 10 5.8 Tolerances on dimensions and shape 10 6 Tests 10 6.1 General 10 6.2 Inspection units . 10 6.2.1 Products of rolled width 600 mm 10 6.2.2 Products of rolled width 1,2 mm special agreements shall be made. cWhen the thickness is less than or equal to 0,7 mm and gre
20、ater than 0,5 mm, the minimum value for elongation is reduced by 2 units. For a thickness less than or equal to 0,5 mm, the minimum value is reduced by 4 units. dThe minimum values for r (trans.) and n (trans.) only apply to products of thickness equal to or greater than 0,5 mm. eFor products with t
21、hickness over 2 mm the minimum r (trans.) value is reduced by 0,2. “ BS EN 10268:2006+A1:2013EN 10268:2006+A1:2013 (E) 9 For the LA grades it may be agreed that the requirements given in Table 3 for longitudinal test pieces shall apply instead of those for transverse test pieces. ! Table 3 Mechanica
22、l properties of longitudinal test pieces Steel name Steel number 0,2% proof strength a Rp0,2 long. MPa Tensile strength Rm long. MPa Elongation b A80 min. long. % HC260LA 1.0480 240-310 340-420 27 HC300LA 1.0489 280-360 370-470 24 HC340LA 1.0548 320-410 400-500 22 HC380LA 1.0550 350-450 430-550 20 H
23、C420LA 1.0556 390-500 460-580 18 HC460LA 1.0574 420-560 480-630 14 HC500LA 1.0573 460-600 520-690 13 NOTE 1 MPa = 1 N/mm2aIf the yield strength is pronounced, the values apply to the lower yield point ReL. bWhen the thickness is less than or equal to 0,7 mm and greater than 0,5 mm, the minimum value
24、 for elongation is reduced by 2 units. For a thickness less than or equal to 0,5 mm, the minimum value is reduced by 4 units. “ 5.5 Surface characteristics 5.5.1 General The surface properties cover surface quality and surface finish. 5.5.2 Surface quality 5.5.2.1 Products of rolled width 600 mm The
25、 products are supplied with one of the surface qualities A or B as defined in EN 10130 except for LA grades for which only surface quality A applies. 5.5.2.2 Products of rolled width 600 mm The requirements of EN 10139 apply. 5.5.3 Surface finish 5.5.3.1 Products of rolled width 600 mm The requireme
26、nts of EN 10130 apply. 5.5.3.2 Products of rolled width 600 mm The requirements of EN 10139 apply. BS EN 10268:2006+A1:2013EN 10268:2006+A1:2013 (E) 10 5.5.4 !Freedom from stretcher strains Freedom from stretcher strains of the surface quality B is guaranteed for: 3 months for bake-hardening grades
27、and 6 months for all other grades commencing from the agreed date of availability.“ 5.6 Suitability for surface coating The products may be intended for metallic coating applied by hot dipping or electrodeposition and/or organic or other coatings. When such a coating is required, this shall be speci
28、fied at the time of enquiry and order. 5.7 Weldability The products are suitable for standard welding processes. However, the welding process should be specified at the time of enquiry and order, especially in the case of gas welding. 5.8 Tolerances on dimensions and shape The tolerances on dimensio
29、ns and shape of products in rolled widths 600 mm are those given in EN 10131; those of products in rolled widths 600 mm are given in EN 10140. 6 Tests 6.1 General The purchaser shall specify at the time of enquiry and order his or her requirements for: type of inspection and testing, specific or non
30、 specific: see EN 10021; type of inspection document: see EN 10204. Specific inspection and testing shall be carried out in accordance with 6.2 to 6.7. Specific inspection and testing may not be specified either for the product analysis or for the surface finish. 6.2 Inspection units 6.2.1 Products
31、of rolled width 600 mm The inspection unit is 30 t or fraction of 30 t for products of the same quality and nominal thickness. When a coil exceeds 30 t, it constitutes a single inspection unit, as does its products. 6.2.2 Products of rolled width 600 mm The inspection unit is 5 t or a fraction of 5
32、t of product of the same steel grade, same heat treatment with the same surface properties and same nominal thickness. Coils of mass exceeding 5 t shall be considered as comprising a single inspection unit. BS EN 10268:2006+A1:2013EN 10268:2006+A1:2013 (E) 11 6.3 Number of tests !For each inspection
33、 unit, a tensile test and, where appropriate, a determination of the plastic strain ratio r and the tensile strain hardening exponent n (see Table 2) in the as-delivered state shall be carried out. In the case of bake hardening steels, further tensile tests shall be carried out (see 6.5.3). By agree
34、ment at the time of enquiry and order, the manufacturer may determine the tensile properties and/or the Bake-Hardening Index BH2 by calculation in accordance with an approved method.“ 6.4 Sampling The requirements of EN ISO 377 and EN 10021 are supplemented by the following specific requirements: fo
35、r sheet and cut lengths the selection of products to be tested and the position of the samples in the products is left to the discretion of the inspection representative; in the case of wide strip and slit wide strip, the sample should preferably be taken from the outer end. If the width of the prod
36、uct permits, the test pieces for the tensile test shall be taken transverse to the direction of rolling. For LA grades, longitudinal tensile test pieces may be agreed on. 6.5 Test methods ! 6.5.1 The tensile test shall be carried out in accordance with EN ISO 6892-1, method B, using test piece numbe
37、r 2 from EN ISO 6892-1:2009, Annex B (initial gauge length Lo = 80 mm and a width of 20 mm). Method A may be used at the discretion of manufacturer.“ 6.5.2 The determination of the plastic strain ratio r and the strain hardening exponent n shall be carried out in accordance with ISO 10113 and ISO 10
38、275. The strain ratio r and the strain hardening exponent n are determined within the strain range 10% to 20%. As the determination shall be carried out in the range of homogeneous deformation, then if the uniform elongation of the tested material is lower than 20%, values for the upper limit of the
39、 strain range of 15% to 20% can be applied. ! 6.5.3 The determination of the yield strength increase by the effect of heat treatment (Bake-Hardening-Index) shall be carried out in accordance with EN 10325.“ 6.6 Chemical analysis For the determination of the chemical composition, EN ISO 14284 and the
40、 corresponding European Standards shall apply. 6.7 Retests The requirement of EN 10021 shall apply. 6.8 Inspection document By agreement at the time of enquiry and order an inspection document chosen from those given in European Standard EN 10204 shall be supplied. BS EN 10268:2006+A1:2013EN 10268:2
41、006+A1:2013 (E) 12 7 Marking 7.1 Products of rolled width 600 mm Unless otherwise agreed at the time of enquiry and order, marking shall be carried out on the inspected surface by means of easy removable non-corrosive ink. Slit wide strip products are not marked unless otherwise agreed at the time o
42、f enquiry and order. 7.2 Products of rolled width 600 mm Marking of the products in line with the specifications of EN 10021 may be agreed at the time of enquiry and order. 8 Packing The packing requirements shall be agreed at the time of enquiry and order. 9 Disputes With regard to any claims and a
43、ny action arising, EN 10021 shall apply. 10 Information to be supplied by the purchaser at the time of enquiry and order In order to allow the manufacturer to supply products conforming to this European Standard, the following information shall be provided by the purchaser at the time of enquiry and
44、 order: a) full designation as given in clause 4; b) nominal dimensions, the tolerances according to the dimensional standard and the ordered quantities; c) limits on the mass and the sizes of the coils and the individual bundles; d) intended application of the products, including surface coatings;
45、e) if the products are to be welded, the indication of the method to be used; f) if the products are to be supplied as suitable for making a specific part; g) if inspection documents are required and their type; h) if an external inspection is to be carried out at the manufacturers works; i) if oili
46、ng is not required; j) if other protective coatings are required; k) detailed description of all other special requirements; l) any special requirements for packing and marking (e. g. bar coding, see EN 606); m) position of the surface of better surface quality. BS EN 10268:2006+A1:2013EN 10268:2006
47、+A1:2013 (E) 13 Bibliography EN 606, Bar coding Transport and handling labels for steel products BS EN 10268:2006+A1:2013BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. Briti
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