1、May 2009DEUTSCHE NORM English price group 8No 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).ICS 77.140.50!$Yj“1565471www
2、.din.deDDIN 1623Cold rolled strip and sheet Technical delivery conditions General structural steelsKaltgewalztes Band und Blech Technische Lieferbedingungen Allgemeine BausthleSupersedesDIN 1623-2:1986-02www.beuth.deDocument comprises pages11Translation by DIN-Sprachendienst.In case of doubt, the Ge
3、rman-language original should be consulted as the authoritative text.DIN 1623:2009-05 Contents Page Foreword. 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions 4 4 Dimensions and tolerances . 5 5 Classification into grades 5 6 Designation . 5 7 Requirements 6 7.1 Steelmaking process 6
4、 7.2 Delivery condition. 6 7.3 Chemical composition . 6 7.4 Mechanical properties 6 7.5 Weldability. 6 7.6 Surface characteristics 7 7.6.1 General. 7 7.6.2 Surface quality 7 7.6.3 Surface finish 8 7.6.4 Suitability for coatings . 8 8 Testing . 9 8.1 General. 9 8.2 Inspection units 9 8.2.1 Inspection
5、 units for products with a rolled width 600 mm 9 8.2.2 Inspection units for products with a rolled width 600 mm 9 8.3 Number of tests. 9 8.4 Sampling 9 8.5 Test methods. 9 8.5.1 Tensile test 9 8.5.2 Chemical composition . 10 9 Inspection documents 10 10 Marking 10 11 Packing 10 12 Disputes. 10 13 In
6、formation to be provided at the time of ordering. 10 Bibliography . 11 2 DIN 1623:2009-05 Foreword This standard was prepared by Subcommittee NA 021-00-01-01 UA Flacherzeugnisse aus Stahl zum Kaltumformen of the Normenausschuss Eisen und Stahl (FES) (Iron and Steel Standards Committee) and represent
7、s the current state of negotiations. Amendments This standard differs from DIN 1623-2:1986-02 as follows: a) The scope has been extended to include cold rolled narrow strip having a rolled width 600 mm. b) Steel grades St 37-2 G (1.0037 G), USt 37-2 G (1.0036 G), St 50-2 G (1.0050 G), St 60-2 G (1.0
8、060 G) and St 70-2 G (1.0070 G) have been deleted without replacement. c) Steel names and material numbers have been modified as follows: St 37-3 G (1.0116 G) is now S215G (1.0116G). St 44-3 G (1.0144 G) is now S245G (1.0144G). St 52-3 G (1.0570 G) is now S325G (1.0570G). d) Specifications regarding
9、 chemical composition (ladle analysis) have been modified. Specifications regarding product analysis have been deleted. e) The technological bend test has been deleted. f) Specifications regarding surface characteristics and marking of such have been modified in accordance with DIN EN 10130 and DIN
10、EN 10139 (see Bibliography for titles). g) Specifications regarding testing have been modified and order details have been added. h) The standard has been editorially revised. Previous editions DIN 1623-2: 1961-01, 1986-02 3 DIN 1623:2009-05 1 Scope 1.1 This standard applies to cold rolled flat prod
11、ucts (strip and sheet) made of uncoated general structural steel in thicknesses up to and including 3 mm. 1.2 This standard does not apply to cold rolled strip and sheet of low carbon steel for cold forming (see DIN EN 10130); cold rolled uncoated low carbon narrow steel strip for cold forming (see
12、DIN EN 10139); cold rolled low carbon steel flat products for vitreous enamelling (see DIN EN 10209); cold rolled steel flat products with high yield strength for cold forming (see DIN EN 10268); hot rolled and cold rolled non-coated flat products of multiphase steels for cold forming (see E DIN EN
13、10338). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN EN 606, Bar co
14、ding Transport and handling labels for steel products DIN EN 10002-1, Metallic materials Tensile testing Part 1: Method of testing at ambient temperature DIN EN 10020, Definition and classification of grades of steel DIN EN 10021, General technical delivery conditions for steel products DIN EN 10027
15、-1, Designation systems for steels Part 1: Steel names DIN EN 10027-2, Designation systems for steels Part 2: Numerical system DIN EN 10049, Measurement of roughness average Ra and peak count RPc on metallic flat products DIN EN 10079, Definition of steel products DIN EN 10131, Cold rolled uncoated
16、and zinc or zinc-nickel electrolytically coated low carbon and high yield strength steel flat products for cold forming Tolerances on dimensions and shape DIN EN 10140, Cold rolled narrow steel strip Tolerances on dimensions and shape DIN EN 10204, Metallic products -Types of inspection documents CE
17、N/TR 10261, Iron and steel Review of available methods of chemical analysis 3 Terms and definitions For the purposes of this document the terms and definitions specified in DIN EN 10020, DIN EN 10021, DIN EN 10079 and DIN EN 10204 apply. 4 DIN 1623:2009-05 4 Dimensions and tolerances Dimensions and
18、tolerances for products having a rolled width 600 mm shall be as in DIN EN 10131, those of products having a rolled width 600 mm shall be as in DIN EN 10140. 5 Classification into grades This standard covers the steel grades given in Table 1. According to DIN EN 10020 these are unalloyed quality ste
19、els. 6 Designation 6.1 The steel names used in this standard are in accordance with DIN EN 10027-1, the material numbers are in accordance with DIN EN 10027-2. 6.2 The complete designation of a steel grade as in this standard shall include: the steel name or material no. (see Table 1); the symbol fo
20、r the surface quality (see 7.6.2) and for cold rolled narrow strip the symbol for the surface finish (see 7.6.3). 6.3 If the product is to comply with additional requirements regarding suitability for coating, this shall be clearly indicated (see 7.6.4), as shall any request that products are to be
21、supplied with an unoiled surface (see clause 13, item k). EXAMPLE 1 Steel grade S215G (material no. 1.0116G) as cold rolled wide strip with normal cold rolled surface (A) and a “matt” surface finish (m): Steel DIN 1623 S215G+A-m or Steel DIN 1623 1.0116G+A-m EXAMPLE 2 Steel grade S215G (material no.
22、 1.0116G) as cold rolled narrow strip with a bright surface (MA) and a “smooth” surface finish (RL): Steel DIN 1623 S215G+MA-RL or Steel DIN 1623 1.0116G+MA-RL 6.4 If the characteristics described in 6.2 and 6.3 are not indicated in the order, products as in this standard will be supplied as follows
23、: surface quality A (or MA for rolled widths 600 mm); surface finish “matt” (or “smooth” for rolled widths 600 mm); oiled surface. 6.5 The order shall give the quantity, product form (strip or sheet), relevant dimensional standard, and desired dimensions of the product to be supplied, and shall make
24、 reference to this standard and give the steel name or material number of the desired steel grade. EXAMPLE 1 20 t cold rolled wide strip as in DIN EN 10131, nominal thickness 0,80 mm, nominal width 1 000 mm, standard tolerances for width and thickness, made of a steel grade as in this standard desig
25、nated as in 6.3: 5 DIN 1623:2009-05 20 t cold rolled wide strip EN 10131 0,80 1 000 Steel DIN 1623 S215G+A-m or 20 t cold rolled wide strip EN 10131 0,80 1 000 Steel DIN 1623 1.0116G+A-m EXAMPLE 2 20 t cold rolled narrow strip as in DIN EN 10140, nominal thickness 1,50 mm, nominal width 200 mm, with
26、 sheared edges (GK), of a steel grade as in this standard designated as in 6.3: 20 t cold rolled narrow strip EN 10140 1,50 200 GK Steel DIN 1623 S215G+MA-RL or 20 t cold rolled narrow strip EN 10140 1,50 200 GK Steel DIN 1623 1.0116G+MA-RL 7 Requirements 7.1 Steelmaking process Where not otherwise
27、agreed at the time of ordering, the steelmaking process is left to the discretion of the manufacturer. Steels are to be killed (deoxidized). The steelmaking process shall be indicated upon request. 7.2 Delivery condition 7.2.1 Products are normally supplied in the skin-passed condition. 7.2.2 Produc
28、ts are normally delivered oiled. In this case, both sides are corrosion protected by a layer of neutral non-drying oil that is free of impurities and is uniformly spread in such a way that the product does not show signs of corrosion under normal packing, transportation, handling and storage conditi
29、ons for a period of three months. The oil tends to distribute during storage. 7.3 Chemical composition Chemical composition (ladle analysis) is specified in Table 1. 7.4 Mechanical properties 7.4.1 When tensile testing as in 8.5.1 the requirements specified in Table 1 shall be met. 7.4.2 Tensile tes
30、t values apply for transverse test pieces. For products which do not present a definite yield-point, yield strength values apply for 0,2% proof stress (Rp0,2), otherwise the values apply for the upper yield point (ReH). The mechanical properties specified in Table 1 apply for a period of six months
31、from the date on which the products are made available at the manufacturers works. 7.5 Weldability Products as in this standard are suitable for conventional industrial welding processes. However, it is useful to state the welding process at the time of ordering, and in the case of gas welding this
32、is obligatory. 6 DIN 1623:2009-05 Table 1 Chemical composition (ladle analysis) and mechanical properties Steel grade Chemical composition % by mass Mechanical properties Tensile strength RmYield strength Rp0,2or ReHElongationat break (Lo= 80 mm)C Si Mn P S MPaaMPaa% Steel name Material number max.
33、max. max. max. max. min. min. S215G 1.0116G 0,18 1,50 0,030 0,025 360 to 510 215 20 S245G 1.0144G 0,20 1,60 0,030 0,025 430 to 580 245 18 S325G 1.0570G 0,20 0,55 1,60 0,030 0,025 510 to 680 325 16 a 1 MPa = 1 N/mm2. 7.6 Surface characteristics 7.6.1 General The surface characteristics are the surfac
34、e quality and surface finish. The surface characteristics of non-skin-passed products shall be agreed separately. 7.6.2 Surface quality 7.6.2.1 Products having a rolled width 600 mm These products are only available with the surface quality A. Surface quality A Defects such as pores, small grooves,
35、small marks, minor scratches and slight discolouration are permitted as long as they do not have an adverse effect on formability or the application of surface coatings. In the case of delivery of wide strip or slit wide strip the percentage of defects may be greater than for sheet or cut lengths. T
36、he purchaser shall take this into account and the permissible percentage of surface defects shall be agreed at the time of ordering. If not otherwise agreed, a single surface of the product shall comply with the specified requirements. The other surface shall be such that, during subsequent treatmen
37、t, it does not have any negative effects on the quality of the better surface. 7 DIN 1623:2009-05 7.6.2.2 Products with a rolled width 600 mm These products can be delivered with a surface quality MA or MB or MC. Surface quality MA Bright, metallically clean surface. Pores, minor defects and minor s
38、cratches are permitted. Surface quality MB Bright, metallically clean surface. Pores, grooves and scratches are permitted as long as the uniformly smooth appearance is not substantially impaired when viewed with the naked eye. Surface quality MC Bright, metallically clean surface. Pores, grooves and
39、 scratches are permitted as long as the uniform appearance of the mirror surface is not impaired. The characteristics given for MA, MB and MC apply to the inspected surface, which is generally the outside surface of coils and the top surface of lengths. The appearance of the uninspected surface shal
40、l meet at least the requirements for surface quality MA. Surface quality MB can be ordered for thicknesses up to 2,0 mm, while surface quality MC can be ordered for thicknesses up to 1,0 mm. The characteristics do not apply to the first inner and outer laps of coil or to lengths cut from them. 7.6.3
41、 Surface finish 7.6.3.1 Products with a rolled width 600 mm Products are supplied with a “matt” (m) surface finish with a mean roughness Ra of 0,6 m Ra 1,9 m. Other surface roughness ranges may be agreed at the time of enquiry and ordering. Testing shall be carried out as in DIN EN 10049. 7.6.3.2 Pr
42、oducts with a rolled width 600 mm The surface finish may be rough (RR), matt (RM), smooth (RL) or mirror finish (RN). The different surface finishes are characterized by the following reference values of mean roughness Ra: rough (RR): Ra 1,5 m matt (RM): 0,6 m Ra 1,8 m smooth (RL): Ra 0,6 m mirror f
43、inish (RN): Ra 0,2 m The mean roughness values shall be determined as in DIN EN 10049. Products with surface qualities MA and MB are generally supplied with a smooth surface finish (RL). If rough (RR) or matt (RM) finishes are required, the corresponding symbol shall be given in the designation. Pro
44、ducts with the surface quality MC are only supplied with a “mirror” finish (RN). 7.6.4 Suitability for coatings Products may be intended for metallic coating by hot dipping, electrolyte coating, and/or an organic or other type of coating. If such a coating is required, this shall be stated at the ti
45、me of ordering. 8 DIN 1623:2009-05 8 Testing 8.1 General 8.1.1 At the time of ordering, the purchaser shall specify whether an inspection document is required. If this is the case, the following information shall be included: type of test as in DIN EN 10021; type of inspection document as in DIN EN
46、10204. 8.1.2 Specific tests are to be carried out as specified in 8.2 to 8.5. 8.2 Inspection units 8.2.1 Inspection units for products with a rolled width 600 mm Inspection units shall comprise 40 t or a fraction of 40 t of products for the same grade and nominal thickness. 8.2.2 Inspection units fo
47、r products with a rolled width 600 mm Inspection units shall comprise 5 t or a fraction of 5 t of products of the same grade, with the same heat treatment and the same surface characteristics and nominal thickness. Coils exceeding 5 t constitute a single inspection unit. 8.3 Number of tests A tensil
48、e test shall be carried out for each inspection unit. 8.4 Sampling In the case of sheet, the selection of products to be tested is left to the discretion of the inspection representative. In the case of wide strip, slit wide strip and narrow strip the sample should preferably be taken from the outer
49、 end of the coil. A sample of adequate size shall be taken from the products selected from the inspection unit, at any position on the strip or length. In cases of dispute, this sample shall be taken from a position at least 3 m from one of the ends of the coil. Samples from narrow strip supplied in cut lengths may be taken at any position. Where not otherwise agreed, tensile test pieces shall be taken perpendicular to the rolling direction. 8.5 Test methods 8.5.
