1、October 2015 Translation by DIN-Sprachendienst.English price group 17No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 77.140.50!%FmK“2357440www.din.deDIN EN 10346Continuously hotdip coated steel flat products for cold forming Technical delivery conditions;English version EN 10346:2015,English translation of DIN EN 10346:2015-10Kontinuierlich schmelztauchveredelte Flacherzeugnisse aus Stahl zum Kaltumformen Techni
3、sche Lieferbedingungen;Englische Fassung EN 10346:2015,Englische bersetzung von DIN EN 10346:2015-10Produits plats en acier revtus en continu par immersion chaud pour formage froid Conditions techniques de livraison;Version anglaise EN 10346:2015,Traduction anglaise de DIN EN 10346:2015-10Supersedes
4、DIN EN 10346:200907www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.DDocument comprises 45 pages 09.15DIN EN 10346:2015-10 2 A comma is used as the decimal marker. National foreword This document (EN 10346:2015) has been prepared by Technical Committee ECI
5、SS/TC 109 “Coated and uncoated flat products to be used for cold forming” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the DIN-Normenausschuss Eisen und Stahl (DIN Standards Committee Iron and Steel), Working Committee NA 021-00-01-02 UA Oberflchenveredel
6、te Flacherzeugnisse aus Stahl. Amendments This standard differs from DIN EN 10346:2009-07 as follows: 1) the scope of the standard has been changed; it is valid now for products of thicknesses 0,20mmt0,9 mm, with the duration of storage. Therefore the user should process the products after their rec
7、eipt 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 the coating a certain cracking of the surface can appear during processing which can consequently reduce abrasion resistance. The user should
8、take these characteristics into account. 6.2.3 Surface protection Regarding surface protection during transport and storage the following should be taken into consideration: Only a temporary corrosion resistance during transportation or storage is provided by any surface protection applied. Colour c
9、hanges 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 can develop. Different oils can show different behaviour. 7 Requirements 7.1 Chemical composition The chemical composition according to the
10、 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 analysis given in Tables 1 to 5 shall meet the requirements in Table 6. DIN EN 10346:2015-10 EN 10346:2015 (E) 13 Table 1 Chemical compositi
11、on (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 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 0,6
12、0 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,+ZA,+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
13、 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 + 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 tes
14、t 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 ) and the strain hardening exponent n (see Tables 7 and 9 to 11) shall be determined in the range of homogeneous deformation, within t
15、he 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 upper 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 s
16、pecified 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 commencing from the agreed date on which the products are made available: a) Mechanical properties: 1) 1 month for steel grades DX51D, DX52D
17、and DX53D and for the steel grades for construction; 2) 3 months for bake-hardening steels and multiphase steels; DIN EN 10346:2015-10EN 10346:2015 (E) 18 3) 6 months for steel grades DX54D, DX55D, DX56D and DX57D and high strength steels, except bake hardening steels. b) Freedom from stretcher stra
18、ins 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 and 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
19、.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 of steel grade DX51D, may be supplied with suitability for manufacturing a specific part. In this case the values given in Table 7
20、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. DIN EN 10346:2015-10 EN 10346:2015 (E) 19 Table 7 Mechanical properties (transverse direction) of low carbon steels for cold forming Design
21、ation Yield strength ReaMPagTensile strength RmMPagElongation A80b% min. Plastic strain ratio r90min. Strain hardening exponent n90min. Steel grade Symbols for the types of available 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,+
22、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 220 260 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
23、 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 120 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
24、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 yield strength is pronounced, the values apply to the lower yield point ReL. bDecreased minimum elongation values apply for pr
25、oduct 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 Reis 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 mi
26、nimum 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 product 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 elo
27、ngation 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. DINEN 10346:2015-10EN 10346:2015 (E) 20 7.2.3 Steels for construction The products shall comply with the requirements in Table 8
28、. 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,
29、+ZA, +ZM, +AZ 220 300 20 S250GD 1.0242 +Z,+ZF,+ZA, +ZM, +AZ,+AS 250 330 19 S280GD 1.0244 +Z,+ZF,+ZA, +ZM, +AZ,+AS 280 360 18 S320GD 1.0250 +Z,+ZF,+ZA, +ZM, +AZ,+AS 320 390 17 S350GD 1.0529 +Z,+ZF,+ZA, +ZM, +AZ,+AS 350 420 16 S390GD 1.0238 +Z,+ZF,+ZA, +ZM, +AZ 390 460 16 S420GD 1.0239 +Z,+ZF,+ZA, +ZM
30、, +AZ 420 480 15 S450GD 1.0233 +Z,+ZF,+ZA, +ZM, +AZ 450 510 14 S550GD 1.0531 +Z,+ZF,+ZA,+ZM, +AZ 550 560 aIf the yield point is pronounced, the values apply to the upper yield point ReH. bFor all grades except S550GD, a range of 140 MPa can be expected for tensile strength. cDecreased minimum elonga
31、tion 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). d1 MPa = 1 N/mm2.7.2.4 Steels with high proof strength for cold forming 7.2.4.1 The products shall comply with the requirements in Table 9. 7.2.4.2 If so agreed at
32、 the time of enquiry and order, products with suitability for manufacturing a specific part can be supplied. In this case the values in Table 9 do not apply. The reject tolerances arising when the material is processed shall not exceed a specific proportion to be agreed upon at the time of enquiry a
33、nd order. DIN EN 10346:2015-10 EN 10346:2015 (E) 21 Table 9 Mechanical properties (transverse direction) of steels with high proof strength for cold forming Designation Proof strength Rp0,2aMPafBake-Hardening Index BH2MPafmin. Tensile strength RmMPafElongation A80b, c% min. Plastic strain ratio r90c
34、, d,emin. Strain hardening exponent n90emin. Steel grade Symbols for the types of available coatings Steel name Steel number HX160YD 1.0910 +Z, +ZF, +ZA, +ZM, +AZ, +AS 160 to 220 300 to 360 37 1,9 0,20 HX180YD 1.0921 180 to 240 330 to 390 34 1,7 0,18 HX180BD 1.0914 180 to 240 30 290 to 360 34 1,5 0,
35、16 HX220YD 1.0923 220 to 280 340 to 420 32 1,5 0,17 HX220BD 1.0919 220 to 280 30 320 to 400 32 1,2 0,15 HX260YD 1.0926 260 to 320 380 to 440 30 1,4 0,16 HX260BD 1.0924 260 to 320 30 360 to 440 28 HX260LAD 1.0929 260 to 330 350 to 430 26 HX300YD 1.0927 300 to 360 390 to 470 27 1,3 0,15 HX300BD 1.0930
36、 300 to 360 30 400 to 480 26 HX300LAD 1.0932 300 to 380 380 to 480 23 HX340BD 1.0945 340 to 400 30 440 to 520 24 HX340LAD 1.0933 340 to 420 410 to 510 21 HX380LAD 1.0934 380 to 480 440 to 560 19 HX420LAD 1.0935 420 to 520 470 to 590 17 HX460LAD 1.0990 460 to 560 500 to 640 15 HX500LAD 1.0991 500 to
37、620 530 to 690 13 aIf the 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 AS-, AZ-, ZF- and ZM- coatings,
38、the minimum A80value reduced by 2 units and the minimum r90-value reduced by 0,2 apply. dDecreased minimum r90-values apply for product thickness 1,5 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,
39、4) and t 0,35mm (minus 0,6) Decreased minimum n90-values apply for product thickness 0,50mm t 0,70mm (minus 0,01), 0,35mm t 0,50mm (minus 0,03) and t 0,35mm (minus 0,04) f1 MPa = 1 N/mm2.DIN EN 10346:2015-10 EN 10346:2015 (E) 22 7.2.5 Multiphase steels for cold forming 7.2.5.1 The products shall com
40、ply with the requirements in Table 10 or Table 11. 7.2.5.2 The values for the tensile test apply for longitudinal pieces. If ordered in accordance with 7.2.5.1, the mechanical property values in Tables 10 and 11 apply for a period of three months for all grades commencing from the date on which the
41、products are made available by the manufacturer. Table 10 Mechanical properties (longitudinal direction) of multiphase steels for cold forming (cold rolled products) Steel grade +Z, +ZF, +ZA, +ZM Proof strength Tensile strength Elongation Strain hardening exponent Bake hardening index Rp 0,2RmA80b,c
42、n10-UEBH2Steel name Steel number MPaaMPaa% MPaamin. min. min. min. dual-phase steels (X) HCT450X 1.0937 260 to 340 450 27 0,16 30 HCT490X 1.0995 290 to 380 490 24 0,15 30 HCT590X 1.0996 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 HCT980XGd1.0997
43、700 to 850 980 8 30 transformation induced plasticity steels (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 a1 MPa = 1 N/mm2. bDe
44、creased minimum elongation values apply for product thickness t 0,60 mm (minus 2 units) cFor ZF coatings the minimum elongation value reduced by 2 units applies. For ZF coatings in product thickness t 0,60 mm, the minimum elongation value reduced by 4 units applies. dXG means dual-phase with increas
45、ed yield strength.DIN EN 10346:2015-10 EN 10346:2015 (E) 23 Table 11 Mechanical properties (longitudinal direction) of multiphase steels for cold forming (hot rolled products) Steel grade +Z, +ZF, +ZM Proof strength Tensile strength Elongation Strain hardening exponent Rp 0,2RmA80n10-UESteel name St
46、eel number MPaaMPaa% % min. min. min. ferritic-bainitic steels (F) HDT450F 1.0961 300 to 420 450 24 HDT580F 1.0994 460 to 620 580 15 dual-phase steel (X) HDT580X 1.0936 330 to 450 580 19 0,13 complex-phase steels (C) HDT750C 1.0956 620 to 760 750 10 HDT760C 1.0998 660 to 830 760 10 HDT950C 1.0958 72
47、0 to 950 950 9 a 1 MPa = 1 N/mm2. 7.3 Type of coatings and coating mass 7.3.1 The products shall be supplied with coatings of zinc (Z), zinc-iron-alloy (ZF), zinc-aluminium-alloy (ZA), zinc-magnesium-alloy (ZM), aluminium-zinc-alloy (AZ) or aluminium-silicon-alloy (AS) as specified in the relevant T
48、able 1, 2, 3, 4 or 5. 7.3.2 The available coating masses are given in Table 12. Deviating coating masses and/or different coating masses on each surface may be supplied if agreed at the time of enquiry and order. Thicker coatings may limit the formability and weldability of the products. Therefore,
49、the forming and weldability requirements shall be taken into account when ordering the coating mass. The surfaces may have a different appearance as a result of the manufacturing process. DIN EN 10346:2015-10 EN 10346:2015 (E) 24 Table 12 Coating mass Coating designation Minimum total coating massa, both surfaces g/m2Theoretical guidance values for coating thickness per surface in the single spot test m Density g/c
