BS EN 10338-2015 Hot rolled and cold rolled non-coated products of multiphase steels for cold forming Technical delivery conditions《冷成型用多相钢的热轧和冷轧无涂层产品 技术交付条件》.pdf

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1、BS EN 10338:2015Hot rolled and cold rolled non-coated products of multiphasesteels for cold forming Technical delivery conditionsBS EN 10338:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 10338:2015. The UK participation in its preparation was entrusted to

2、 TechnicalCommittee ISE/109, Coated and Uncoated Flat Products to be Used for Cold Forming.A list of organizations represented on this committee 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

3、for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 82408 1 ICS 77.140.50 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Po

4、licy and Strategy Committee on 31 July 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10338 July 2015 ICS 77.140.50 English Version Hot rolled and cold rolled non-coated products of multiphase steels for cold formin

5、g - Technical delivery conditions Produits plats non revtus lamins chaud et froid en aciers multiphass pour formage froid - Conditions techniques de livraison Kaltgewalzte und warmgewalzte Flacherzeugnisse ohne berzug aus Mehrphasensthlen zum Kaltumformen - Technische Lieferbedingungen This European

6、 Standard was approved by CEN on 16 April 2015. 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 concern

7、ing 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 member into

8、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, France, Ger

9、many, 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 KOMITEE F

10、R NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10338:2015 EBS EN 10338:2015EN 10338:2015 (E) 2 Contents Page European foreword .3 1 Scope 4 2 Normativ

11、e references 4 3 Terms and definitions .5 4 Dimensions and tolerances 5 5 Classification and designation .6 5.1 Classification 6 5.2 Designation 6 6 Information to be supplied by the purchaser at the time of enquiry and order 6 6.1 Mandatory information 6 6.2 Options .7 7 Manufacturing process and d

12、elivery conditions 7 7.1 Manufacturing process .7 7.2 Delivery conditions 7 8 Requirements .8 8.1 Chemical composition 8 8.2 Mechanical properties 10 8.3 Surface properties 11 8.3.1 Hot rolled products . 11 8.3.2 Cold rolled products . 12 8.4 Suitability for surface coating . 12 8.5 Weldability . 12

13、 9 Inspection 12 9.1 Types of inspection and inspection documents . 12 9.2 Test units . 12 9.3 Tests to be carried out . 12 9.4 Sampling 13 9.5 Test methods . 13 9.5.1 Tensile test 13 9.5.2 Strain hardening exponent 13 9.5.3 Bake Hardening index 13 9.5.4 Surface inspection 13 9.6 Retests . 13 10 Mar

14、king 14 11 Packing 14 12 Storage and transportation 14 13 Disputes . 14 Bibliography . 15 BS EN 10338:2015EN 10338:2015 (E) 3 European foreword This document (EN 10338:2015) has been prepared by Technical Committee ECISS/TC 109 “Coated and uncoated flat products to be used for cold forming”, the sec

15、retariat 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 January 2016, and conflicting national standards shall be withdrawn at the latest by January 2016. Attention is

16、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 patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the foll

17、owing 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, Luxembourg, Malta, Netherlands,

18、Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 10338:2015EN 10338:2015 (E) 4 1 Scope This European Standard applies to hot rolled and cold rolled non-coated steel flat products made of multiphase steels for cold forming. It cov

19、ers cold rolled products of thicknesses t 0,80 to 2,20 0/+ 0,10 Mn 2,50 0/+ 0,10 2,5 to 2,9 0/+0,12 P 0,080 0/+ 0,01 S 0,015 0/+ 0,003 Al 2,00 0/+ 0,10 Cr + Mo 1,40 0/+ 0,06 Nb + Ti 0,25 0/+ 0,025 V 0,22 0/+ 0,02 B 0,01 0/+ 0,001 BS EN 10338:2015EN 10338:2015 (E) 10 8.2 Mechanical properties 8.2.1 T

20、he mechanical properties of the products shall comply with the requirements of Table 4 or Table 5. 8.2.2 The values for the tensile test apply for longitudinal test pieces. 8.2.3 The strain hardening exponent n shall be determined in the range of homogeneous deformation, within the strain range of 1

21、0 % to UE (Uniform Elongation) %. The uniform elongation of the material to be tested may be lower than 20 %. In this case the upper limit of the strain range is the uniform elongation (Ag) and the lower limit of the strain range shall be agreed at the moment of order. 8.2.4 The mechanical propertie

22、s in Table 4 and Table 5 are valid for 3 months, beginning from the agreed availability by the producer. Table 4 Hot rolled products - Mechanical properties Steel grade Proof strength Tensile strength Elongation Strain hardening exponent n10-UERp 0,2RmA80A5for thickness 3 mm Steel name Steel number

23、MPaaMPaamin. % min.% min.min. ferritic-bainitic steels (F) HDT450F 1.0961 300 to 420 450 24 27 HDT580F 1.0994 460 to 620 580 15 17 dual-phase steel (X) HDT580X 1.0936 330 to 450 580 19 23 0,13 complex-phase steel (C) HDT760C 1.0998 660 to 830 760 10 12 martensitic steel (MS) HDT1180G1 1.0960 900 to

24、1200 1180 4 5 a1 MPa = 1 N/mm2BS EN 10338:2015EN 10338:2015 (E) 11 Table 5 Cold rolled products - Mechanical properties Steel grade Proof strength Tensile strength Elongation Strain hardening exponent Bake hardening index Rp 0,2RmA80bn10 - UEBH2Steel name Steel number MPaaMPaa% MPaamin. min. min. mi

25、n. dual-phase steels (X) HCT450X 1.0937 260 to 340 450 27 0,16 30 HCT490X 1.0939 290 to 380 490 24 0,15 30 HCT590X 1.0941 330 to 430 590 20 0,14 30 HCT780X 1.0943 440 to 550 780 14 - 30 HCT980X 1.0944 590 to 740 980 10 30 HCT980XGc1.0997 700 to 850 980 8 30 transformation induced plasticity steels (

26、T) HCT690T 1.0947 400 to 520 690 23 0,19 40 HCT780T 1.0948 450 to 570 780 21 0,16 40 complex-phase steels (C) HCT600C 1.0953 350 to 500 600 16 30 HCT780C 1.0954 570 to 720 780 10 30 HCT980C 1.0955 780 to 950 980 6 30 multiphase steel (MP) HCT1180G2 1.0969 900 to 1150 1180 4 30 a1 MPa = 1 N/mm2. bDec

27、reased minimum elongation values apply for product thicknesst 0,60 mm (minus 2 units).cXG means dual-phase with increased yield strength. 8.3 Surface properties 8.3.1 Hot rolled products The products shall not have any slivers, blow holes, seams, cracks or scratches which would adversely affect thei

28、r use. Pores, small pits, small marks, small scratches, kinks from pay-off reels and a slight coloration are permitted. The imperfections shall not be of such an extent that they might run the risk of causing failure or damage to tooling or welding difficulties when in use. The surface quality of th

29、e unwound coil is assessed as for sheets. However, the percentage of surface imperfections is generally greater than when supplied in sheets. The maximum percentage of permissible rejections shall be fixed by special agreement at the time of enquiry and order. BS EN 10338:2015EN 10338:2015 (E) 12 8.

30、3.2 Cold rolled products 8.3.2.1 Surface quality The products are supplied with the surface quality A as defined in EN 10130. 8.3.2.2 Surface finish The requirements of EN 10130 apply. 8.4 Suitability for surface coating The products may be intended for metallic coating by hot dipping or electro dep

31、osition and/or organic or other coatings. When a coating is required, it shall be specified at the time of order. 8.5 Weldability The welding process should be specified at the time of enquiry and order, essentially in the case of gas welding. For non-descaled hot rolled products, the welding proces

32、s shall take into account the presence of a layer of scale. 9 Inspection 9.1 Types of inspection and inspection documents 9.1.1 Unless otherwise specified at the time of enquiry and order (see 9.1.2 and 9.1.3), the products shall be delivered with non-specific inspection without inspection document.

33、 9.1.2 Specific testing in accordance with the requirements in 9.2 to 9.6 may be specified at the time of enquiry and order. 9.1.3 The type of inspection document to be delivered in accordance with EN 10204:2004, if requested for non-specific inspection (inspection document 2.1 or 2.2) or mandatory

34、to be delivered for specific inspection (inspection document 3.1 or 3.2), shall be specified at the time of enquiry and order. If an inspection certificate 3.2 is specified, the purchaser shall notify the manufacturer of the name and address of the organisation or person who is to carry out the insp

35、ection and produce the inspection document. It shall also be agreed which party shall issue the certificate. 9.2 Test units The test unit consists of a maximum of 20 t or a fraction of 20 t of flat products of the same grade and nominal thickness, and surface condition. In the case of strip, a coil

36、weighing more than 20 t shall be regarded as one test unit. 9.3 Tests to be carried out One series of tests shall be carried out per test unit as specified in 9.2 to determine: the mechanical properties (see 9.5.1); the n-values, if specified in Table 4 or Table 5 (see 9.5.2); the Bake-Hardening Ind

37、ex BH2, in Table 5 (see 9.5.3). By agreement at the time of enquiry and order, the manufacturer may determine the tensile properties and/or Bake Hardening Index BH2by calculation with an approved method. BS EN 10338:2015EN 10338:2015 (E) 13 9.4 Sampling 9.4.1 In the case of strip, the samples shall

38、be taken from the beginning or the end of the coil. In the case of sheet and cut lengths, sampling shall be in accordance with EN ISO 377:2013. 9.4.2 The sample for the tensile test (see 9.5.1) shall be taken in the specified direction (see 8.2.2) at a distance of at least 50 mm from the edge of the

39、 product. 9.4.3 All the samples shall be taken in such a way that the results of the tests are not affected. 9.5 Test methods 9.5.1 Tensile test The tensile test shall be carried out as specified in EN ISO 6892-1:2009. For products with a thickness less than 3 mm the test piece used (initial gauge l

40、ength L0= 80 mm, width b = 20 mm) shall be of type 2 as described in Annex B of EN ISO 6892-1:2009. For products with a thickness greater than or equal to 3 mm the test piece used is the proportional test piece with an initial gauge length L0given by the formula: 0065,5 SL = where S0is the original

41、cross-sectional area of the parallel length of the test piece; the maximum parallel width is 30 mm and the thickness that of the sheet. Test pieces may be non-proportional but in case of dispute proportional test pieces shall be used. 9.5.2 Strain hardening exponent The determination of the strain h

42、ardening exponent n shall be carried out in accordance with ISO 10275. 9.5.3 Bake Hardening index The determination of the yield strength increase by the effect of heat treatment (Bake-Hardening-Index BH2) shall be carried out in accordance with EN 10325:2006. 9.5.4 Surface inspection 9.5.4.1 The pr

43、oduct surface shall be visually inspected for verification of conformance with the requirements in 8.3. 9.5.4.2 Unless otherwise agreed at the time of enquiry and order, only one surface shall be inspected at the manufacturers works. If requested, the manufacturer shall inform the purchaser whether

44、the inspected surface is the top surface or the bottom surface. Small edge cracks which may occur in the case of mill edges are not justification for rejection. 9.5.4.3 Roughness (Ra) measurements, where applicable shall be carried out in accordance with EN 10049 9.6 Retests The requirements of EN 1

45、0021:2006 shall apply. In the case of coils, the retest specimens shall be taken from a distance of at least one lap away, but with a maximum of 20 m from the end of the coil. BS EN 10338:2015EN 10338:2015 (E) 14 10 Marking A label shall be attached to each coil or bundle containing at least the fol

46、lowing information: a) name or mark of the manufacturers works; b) designation (see 5.2); c) nominal dimensions of the product; d) identification number; e) order number; f) mass of the coil or bundle. Marking of the products by branding may be agreed upon at the time of order. 11 Packing The packin

47、g requirements shall be agreed when ordering. 12 Storage and transportation Moisture, in particular condensation between the sheets, laps of the coil or other adjacent parts can lead to the formation of corrosion products. As a precaution, the products should be transported and stored dry and protec

48、ted from moisture. 13 Disputes With regard to any claims and any action arising from them, EN 10021:2006 shall apply. BS EN 10338:2015EN 10338:2015 (E) 15 Bibliography 1 CEN/TR 10261, Iron and steel - European standards for the determination of chemical composition 2 EN ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical composition (ISO 14284) This page deliberately left blank

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