1、BS EN 10346:2015Continuously hot-dip coatedsteel flat products for coldforming Technical deliveryconditionsBS EN 10346:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 10346:2015. It supersedes BS EN 10346:2009 which is withdrawn.The UK participation in its
2、preparation was entrusted to Technical Committee 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 con
3、tract. Users are responsible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 82407 4 ICS 77.140.50 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the
4、authority of the Standards Policy 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 10346 July 2015 ICS 77.140.50 Supersedes EN 10346:2009English Version Continuously hot-dip coated st
5、eel flat products for cold forming -Technical delivery conditions Produits plats en acier revtus en continu par immersion chaud pour formage froid - Conditions techniques de livraison Kontiuerlich schmelztauchverdelt Flacherzugnise aus Stahl - Technische Lieferbedingungen This European Standard was
6、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 concerning such natio
7、nal 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 its own langua
8、ge 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, Germany, Greece,
9、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 FR NORMUNG CEN-
10、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 10346:2015 EBS EN 10346:2015EN 10346:2015 (E) 2 Contents Page European foreword .5 1 Scope 6 2 Normative References .
11、6 3 Terms and definitions .7 4 Classification and designation .9 4.1 Classification 9 4.1.1 General 9 4.1.2 Low carbon steels for cold forming .9 4.1.3 Steels for construction . 10 4.1.4 Steels with high proof strength for cold forming 10 4.1.5 Multiphase steels for cold forming . 10 4.2 Designation
12、 . 10 4.2.1 Steel names . 10 4.2.2 Steel numbers . 10 5 Information to be supplied by the purchaser 10 5.1 Mandatory information . 10 5.2 Options 11 6 Manufacturing and processing . 12 6.1 Manufacturing . 12 6.2 Processing . 12 6.2.1 Ageing 12 6.2.2 Coating appearance . 12 6.2.3 Surface protection 1
13、2 7 Requirements 12 7.1 Chemical composition . 12 7.2 Mechanical properties 17 7.2.1 General . 17 7.2.2 Low carbon steels for cold forming 18 7.2.3 Steels for construction . 20 7.2.4 Steels with high proof strength for cold forming 20 7.2.5 Multiphase steels for cold forming . 22 7.3 Type of coating
14、s and coating mass 23 7.4 Coating finish 26 7.4.1 General . 26 7.4.2 Zinc coated products (Z) 26 7.4.3 Zinc-iron alloy coated products (ZF) 26 7.4.4 Zinc-aluminium coated products (ZA) 26 7.4.5 Zinc-magnesium coated products (ZM) . 26 7.4.6 Aluminium-zinc coated products (AZ) 26 7.4.7 Aluminium-sili
15、con coated products (AS) . 26 7.5 Surface quality 27 7.5.1 General . 27 7.5.2 Types of surface qualities 29 7.5.3 Roughness 29 7.6 Surface treatment (surface protection) 29 7.6.1 General . 29 7.6.2 Chemical passivation (C) . 30 7.6.3 Oiling (O) 30 BS EN 10346:2015EN 10346:2015 (E) 3 7.6.4 Chemical p
16、assivation and oiling (CO) . 30 7.6.5 Phosphating (P) . 30 7.6.6 Sealing (S) 30 7.7 Coil breaks and bends (kinks) . 30 7.7.1 Freedom from coil breaks. 30 7.7.2 Bends (kinks) by winding on coiler drums . 31 7.8 Stretcher strains 31 7.9 Coating mass . 31 7.10 Adhesion of coating 31 7.11 Surface condit
17、ion 31 7.12 Tolerances on dimensions and shape 31 7.13 Suitability for further processing . 32 8 Inspection . 32 8.1 Types of inspection and inspection documents 32 8.2 Test units 32 8.3 Tests to be carried out 32 8.4 Sampling. 32 8.5 Test methods . 33 8.5.1 Tensile test . 33 8.5.2 Plastic strain ra
18、tio and hardening exponent 33 8.5.3 Bake Hardening index . 33 8.5.4 Surface inspection 33 8.5.5 Coating mass . 34 8.6 Retests 34 9 Marking . 34 10 Packing . 34 11 Storage and transportation 35 Annex A (normative) Reference method for determination of the zinc, zinc-iron, zinc-aluminium, zinc-magnesi
19、um and aluminium-zinc coating mass . 36 A.1 Principle 36 A.2 Reagent and preparation of the solution 36 A.2.1 Reagent. 36 A.2.2 Preparation of the solution . 36 A.3 Apparatus . 36 A.4 Procedure . 36 Annex B (normative) Reference method for determination of the aluminium-silicon coating mass . 37 B.1
20、 Principle 37 B.2 Reagents. 37 B.3 Procedure . 37 B.3.1 Samples 37 B.3.2 Method 37 B.4 Evaluation. 37 Annex C (normative) Method for determination of the mass of the Al-Fe-Si alloy layer . 38 C.1 Principle 38 C.2 Reagents. 38 C.2.1 Tin (II) chloride solution 38 BS EN 10346:2015EN 10346:2015 (E) 4 C.
21、3 Procedure 38 C.3.1 Removal of the non-alloy layer 38 C.3.2 Determination of alloy layer . 38 C.4 Evaluation 38 Annex D (informative) Technical changes from the previous edition 39 D.1 Introduction . 39 D.2 Technical changes 39 Bibliography . 41 BS EN 10346:2015EN 10346:2015 (E) 5 European foreword
22、 This document (EN 10346:2015) has been prepared 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 identi
23、cal 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 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 r
24、esponsible for identifying any or all such patent rights. This document supersedes EN 10346:2009. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyp
25、rus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the Unite
26、d Kingdom. BS EN 10346:2015EN 10346:2015 (E) 6 1 Scope This European Standard specifies requirements for continuously hot-dip coated products made of low carbon steels for cold forming, of steels for construction and of steels with high proof strength for cold forming coated with zinc (Z), zinc-iron
27、 alloy (ZF), zinc-aluminium alloy (ZA), aluminium-zinc alloy (AZ), aluminium-silicon alloy (AS) or zinc-magnesium alloy (ZM) and for continuously hot-dip coated products made of multiphase steels for cold forming coated with zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA) or zinc-magnesium
28、 alloy (ZM) in thicknesses of 0,20 mm t 0,9 mm, with the duration of storage. Therefore the user should process the products after their receipt as quick as possible (see 7.2.1.3). 6.2.2 Coating appearance The coating surface can vary and change to a dark appearance by oxidation. Due to ageing of th
29、e coating a certain cracking of the surface can appear during processing which can consequently reduce abrasion resistance. The user should take these characteristics into account. 6.2.3 Surface protection Regarding surface protection during transport and storage the following should be taken into c
30、onsideration: Only a temporary corrosion resistance during transportation or storage is provided by any surface protection applied. Colour changes can occur. In particular, protection by oiling is dependent on storage time. The primarily uniform oil film becomes more and more unequal, and bare spots
31、 can develop. Different oils can show different behaviour. 7 Requirements 7.1 Chemical composition The chemical composition according to the cast analysis shall be as specified in Tables 1 to 5. If a product analysis is agreed at the time of enquiry and order, the permitted deviations from the cast
32、analysis given in Tables 1 to 5 shall meet the requirements in Table 6. BS EN 10346:2015EN 10346:2015 (E) 13 Table 1 Chemical composition (cast analysis) of low carbon steels for cold forming Designation Chemical composition % by mass max. Steel grade Symbols for the types of available coatings C Si
33、 Mn P S TiaSteel name Steel number DX51D 1.0917 +Z,+ZF,+ZA,+ZM,+AZ,+AS 0,18 1,20 0,12 DX52D 1.0918 +Z,+ZF,+ZA,+ZM,+AZ,+AS 0,12 0,50 0,60 0,10 0,045 0,30 DX53D 1.0951 +Z,+ZF,+ZA,+ZM,+AZ,+AS DX54D 1.0952 +Z,+ZF,+ZA,+ZM,+AZ,+AS DX55D 1.0962 +AS DX56D 1.0963 +Z,+ZF,+ZA,+ZM,+AZ,+AS DX57D 1.0853 +Z,+ZF,+Z
34、A,+ZM,+AS aBy agreement at the time of enquiry and order, the content of Ti for the steel grades mentioned in this Table may be lowered to 0,60 0,80 + 0,05 0,80 2,20 + 0,10 Mn 2,90 + 0,10 P 0,12 + 0,01 S 0,015 + 0,003 0,015 0,045 + 0,005 Altotal 0,010 - 0,005 2,00 + 0,10 Cr + Mo 1,40 + 0,05 Nb 0,09
35、+ 0,02 Ti 0,15 + 0,02 Nb + Ti 0,25 + 0,02 V 0,30 + 0,02 B 0,005 + 0,001 7.2 Mechanical properties 7.2.1 General 7.2.1.1 The tensile test values apply to test piece cross-section without coating, in the test direction given in Tables 7 to 11 and 7.2.5.2. 7.2.1.2 The strain ratio r (see Tables 7 and 9
36、 ) and the strain hardening exponent n (see Tables 7 and 9 to 11) shall be determined in the range of homogeneous deformation, within the strain range of 10 % to 20 %. The uniform elongation Agof the material to be tested may be lower than 20 %. In this case the uniform elongation Agrepresents the u
37、pper limit of the strain range, and the lower limit of the strain range shall be agreed at the time of enquiry and order. 7.2.1.3 The specified mechanical properties (and freedom from stretcher strains for surface quality B or C, see 7.5.2 and 7.8) apply for following steel grades and periods commen
38、cing from the agreed date on which the products are made available: a) Mechanical properties: 1) 1 month for steel grades DX51D, DX52D and DX53D and for the steel grades for construction; 2) 3 months for bake-hardening steels and multiphase steels; BS EN 10346:2015EN 10346:2015 (E) 18 3) 6 months fo
39、r steel grades DX54D, DX55D, DX56D and DX57D and high strength steels, except bake hardening steels. b) Freedom from stretcher strains for surface quality B or C: 1) 3 months for bake-hardening steels, if storage temperature is below 50C; 2) 6 months for steel grades DX54D, DX55D, DX56D and DX57D an
40、d interstitial free steels; 3) no requirement for a fixed period for all other steels. 7.2.2 Low carbon steels for cold forming 7.2.2.1 The products shall comply with the requirements in Table 7. 7.2.2.2 lf so agreed at the time of enquiry and order, products specified in Table 7, except those made
41、of steel grade DX51D, may be supplied with suitability for manufacturing a specific part. In this case the values given in Table 7 do not apply. The reject tolerances arising when the material is processed shall not exceed a specific proportion to be agreed at the time of enquiry and order. BS EN 10
42、346:2015EN 10346:2015 (E) 19 Table 7 Mechanical properties (transverse direction) of low carbon steels for cold forming Designation Yield strength ReaMPagTensile strength RmMPagElongation A80b% min. Plastic strain ratio r90min. Strain hardening exponent n90min. Steel grade Symbols for the types of a
43、vailable coatings Steel name Steel number DX51D 1.0917 +Z,+ZF,+ZA,+ZM,+AZ,+AS, 270 to 500 22 DX52D 1.0918 +Z,+ZF,+ZA,+ZM +AZ,+AS 140 to 300c270 to 420 26 DX53D 1.0951 +Z,+ZF,+ZA,+ZM +AZ,+AS 140 to 260 270 to 380 30 DX54D 1.0952 +Z,+ZA 120 to 220 260 to 350 36 1,6d0,18 DX54D 1.0952 +ZF,+ZM 120 to 220
44、 260 to 350 34 1,4d0,18 DX54D 1.0952 +AZ 120 to 220 260 to 350 36 DX54D 1.0952 +AS 120 to 220 260 to 350 34 1,4d, e0,18eDX55Df 1.0962 +AS 140 to 240 270 to 370 30 DX56D 1.0963 +Z,+ZA 120 to 180 260 to 350 39 1,9d 0,21 DX56D 1.0963 +ZF,+ZM 120 to 180 260 to 350 37 1,7d, e0,20eDX56D 1.0963 +AZ, +AS 12
45、0 to 180 260 to 350 39 1,7d, e0,20eDX57D 1.0853 +Z, +ZA 120 to 170 260 to 350 41 2,1d0,22 DX57D 1.0853 +ZF,+ZM 120 to 170 260 to 350 39 1,9d, e0,21eDX57D 1.0853 +AS 120 to 170 260 to 350 41 1,9d, e0,21eaIf the yield point is not pronounced, the values apply to the 0,2 %-proof strength Rp0,2; if the
46、yield strength is pronounced, the values apply to the lower yield point ReL. bDecreased minimum elongation values apply for product thickness 0,50mm t 0,70mm (minus 2 units), 0,35mm t 0,50mm (minus 4 units) and t 0,35mm (minus 7 units) . cFor surface quality A, the upper value for yield strength Rei
47、s 360 MPa. dDecreased minimum r90-values apply for product thickness 1,5mm t 2 mm (minus 0,2) t 2 mm (minus 0,4) eDecreased minimum r90-values apply for product thickness 0,50mm t 0,70mm (minus 0,2), 0,35mm t 0,50mm (minus 0,4) and t 0,35mm (minus 0,6) apply. Decreased minimum n90-values apply for p
48、roduct thickness 0,50mm t 0,70mm (minus 0,01), 0,35mm t 0,50mm (minus 0,03) and t 0,35mm (minus 0,04) apply. f The minimum elongation of products made of DX55D+AS which does not follow the systematic order should be noted. DX55D+AS is chararacterized by the best heat resistance. g1 MPa = 1 N/mm2. BS
49、 EN 10346:2015EN 10346:2015 (E) 20 7.2.3 Steels for construction The products shall comply with the requirements in Table 8. Table 8 Mechanical properties (longitudinal direction) of steels for construction Designation Mechanical properties Steel grade Symbols for the types of available coatings Proof strength Rp0,2aMPadmin. Tensile strength RmbMPadmin. Elongation A80c% min. Steel name Steel number S220GD 1.0241 +Z,+ZF,+ZA, +ZM, +AZ 220 300 20 S250GD 1.0242 +Z,+ZF,+ZA, +ZM, +AZ,+AS 250 330 19 S280GD 1.0244 +Z
