BS ISO 4960-2008 Cold-reduced carbon steel strip with a mass fraction of carbon over 0 25 %《碳质量分率大于0 25%的冷轧碳素钢带》.pdf
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1、BRITISH STANDARDBS ISO 4960:2007Cold-reduced carbon steel strip with a mass fraction of carbon over 0,25 %ICS 77.140.50g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g
2、42g43g55g3g47g36g58BS ISO 4960:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2008 BSI 2008ISBN 978 0 580 56309 6National forewordThis British Standard is the UK implementation of ISO 4960:2007.The UK participation in its prep
3、aration was entrusted to Technical Committee ISE/10, Flat rolled steels products.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 for its co
4、rrect application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsReference numberISO 4960:2007(E)INTERNATIONAL STANDARD ISO4960Third edition2007-12-15Cold-reduced carbon steel strip with a mass fraction of c
5、arbon over 0,25 % Feuillards en acier au carbone lamins froid teneur en carbone suprieure 0,25 % BS ISO 4960:2007ii iiiContents Page Foreword iv 1 Scope 1 2 Normative references 1 3 Terms and definitions .2 4 Specified qualities appropriate to the particular grade .2 5 Conditions of manufacture .3 5
6、.1 Steelmaking3 5.2 Chemical composition 3 5.3 Heat analysis3 5.4 Product analysis 3 5.5 Surface finish .5 5.6 Oiling.5 5.7 Weldability5 5.8 Application .5 5.9 Mechanical properties.5 6 Ordering requirements and dimensional tolerances .8 6.1 Ordering requirements8 6.2 Dimensional tolerances 8 7 Samp
7、ling.8 8 Mechanical property tests 8 8.1 Hardness test .8 8.2 Tensile test .8 9 Decarburization9 10 Retests 9 10.1 Machining and flaws9 10.2 Additional tests9 11 Resubmission 11 12 Workmanship .11 13 Inspection and acceptance.11 14 Coil size 11 15 Marking .11 16 Information to be supplied by the pur
8、chaser .12 Bibliography 13 BS ISO 4960:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each mem
9、ber body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International El
10、ectrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards ado
11、pted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of pat
12、ent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 4960 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill flat rolled products. This third edition cancels and replaces the second edition (ISO 4960:1999), which has
13、been technically revised. BS ISO 4960:20071Cold-reduced carbon steel strip with a mass fraction of carbon over 0,25 % 1 Scope 1.1 This International Standard applies to cold-reduced carbon steel strip with a mass fraction of carbon over 0,25 % made from the steels specified in Table 1. It is commonl
14、y produced in thicknesses of 6 mm and under, and in widths up to 600 mm exclusive, in coils and cut lengths. The strip is ordered in the as-delivered condition, as specified in 6.1 or Clause 5, and is predominantly used for springs, but also for other highly stressed parts of many different types. S
15、teel designations CS55 to CS95 may be supplied in the quenched and tempered condition. 1.2 This International Standard does not apply to alloy steels or stainless steels. 1.3 Cold-reduced carbon steel strip is furnished in the following types: a) full hard, where a very stiff, springy product is pro
16、duced to obtain full hardness after the final rolling (it is intended for flat work not requiring the ability to withstand cold forming); b) annealed, which is intended for applications requiring moderate cold forming; c) quenched and tempered, which is intended generally for the production of steel
17、 springs where the appropriate combination of strength, hardness, toughness and ductility can be achieved; d) intermediate hardness, which is intended for applications where cold forming is slight or where a moderately stiff, springy product is needed. 1.4 Cold-reduced carbon steel strip is characte
18、rized by close dimensional tolerances and good surface finish and, in the cold-rolled and quenched and tempered condition, it is possible to attain high values for hardness and tensile strength. 2 Normative references The following referenced documents are indispensable for the application of this d
19、ocument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method ISO 6508-1, Metallic materials Rockwell hardness test Part
20、 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) ISO 6892, Metallic materials Tensile testing Method of testing at ambient temperature BS ISO 4960:20072 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 cold-reduced carbon steel strip p
21、roduct produced from a hot-rolled pickled coil which has been given substantial cold reduction NOTE The product is characterized by an improved surface, greater uniformity in thickness and improved mechanical properties compared to hot-rolled strip. Cold-reduced strip is also characterized by tighte
22、r thickness tolerances than cold-reduced sheet, as well as specified edges. 3.2 skin pass light cold rolling of the product NOTE 1 The purpose of skin passing is one or more of the following: a) to minimize the appearance of coil breaks, stretcher strains and fluting b) to control the shape; c) to o
23、btain the required surface finish. NOTE 2 Some increase in hardness and some loss in ductility will result from skin passing. 3.3 Edges Material is normally supplied as described in 3.3.1 and 3.3.2. Other edges may be supplied as agreed between the manufacturer and purchaser. 3.3.1 mill edge normal
24、side edge without any definite contour produced in hot rolling NOTE Mill edges may contain some irregularities, such as cracked or torn edges or thin (feathered) edges. 3.3.2 sheared edge normal edge obtained by shearing, slitting or trimming a mill-edge product NOTE Normal processing does not neces
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