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1、BRITISH STANDARD BS ISO 13887:2004 Cold-reduced steel sheet of higher yield strength with improved formability ICS 77.140.50 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:26:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 13887:2004 This British Standard was published under the au
2、thority of the Standards Policy and Strategy Committee on 8 June 2004 BSI 8 June 2004 ISBN 0 580 43869 4 National foreword This British Standard reproduces verbatim ISO 13887:2004 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Commit
3、tee ISE/10, Flat rolled steel products, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in t
4、he BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible
5、 for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK
6、interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 11 and a back cover. The BSI copyright notice displaye
7、d in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:26:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 13887:2004(E) INTERNATIONAL ADNATSDR ISO 17883 ceS
8、ond deition -400210-50 Cold-reduced steel sheet of higher yield strength with improved formability Tles lamines froid en acier limite dlasticit et aptitude au formage accrues Referecne unbmer OSI 78831:002)E(4 OSI 4002 INTERNATIONAL STANDARD ISO 13887 Second edition 2004-05-01 dloCder-decu tseehs le
9、eo tf ihghre yidle gnertsw htiht orpmived mrofabtiliy Tsel laminse rf oid a necrei l imiet dlsacitie tt aptitedu ua rofmgaca ecrseu BS ISO 13887:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:26:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BS ISO 13887:2004 Licensed Copy: sheffie
10、ldun sheffieldun, na, Mon Nov 27 07:26:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents Page Forewordiv Introduction v 1 Scope1 2 Normative references .1 3 Terms and definitions.1 4 Conditions of manufacture 2 4.1 Steelmaking.2 4.2 Chemical composition2 4.3 Chemical analysis.3 4.4 Weldabil
11、ity .3 4.5 Application.3 4.6 Mechanical properties3 4.7 Surface condition4 4.8 Surface finish 4 4.9 Oiling4 5 Dimensional tolerances4 6 Sampling tensile test5 7 Mechanical property tests tensile test.5 8 Retests .5 8.1 Machining and flaws.5 8.2 Additional tests .5 9 Resubmission5 10 Workmanship 5 11
12、 Inspection and acceptance5 12 Coil size6 13 Marking.6 14 Information to be supplied by the purchaser.6 Bibliography .11 BS ISO 13887:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:26:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv Foreword ISO (the International Organization for St
13、andardization) 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 member body interested in a subject for which a technical committee has been established has the rig
14、ht 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 Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International
15、 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 adopted by the technical committees are circulated to the member bodies for voting. Publication as a
16、n 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 patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO
17、13887 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill flat rolled products. This second edition cancels and replaces the first edition (ISO 13887:1995), which has been technically revised. BS ISO 13887:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov
18、 27 07:26:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI v Introduction With the combination of higher strength and improved formability derived from the tests outlined in this International Standard, it is possible to obtain savings in mass along with better weldability. The standards listed below (
19、see Bibliography) may be reviewed for comparison with this ISO International Standard. The relationship between the standards might only be approximate; therefore, the respective standards should be consulted for actual requirements. Those who use these documents will need to determine which specifi
20、cations address their needs. BS ISO 13887:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:26:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:26:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTENRATIONAL TSANDADR IS:78831 O
21、4002(E) 1 Cold-reduced steel sheet of higher yield strength with improved formability 1 Scope This International Standard establishes a system of testing for improved formability and strength of cold- reduced steel sheet in the seven grades listed in Table 1. It is suitable for applications where th
22、e surface of the sheet is of prime importance. This International Standard is not applicable to steels designated as commercial quality or drawing qualities (see ISO 3574), steels of structural quality (see ISO 4997) or steels of high tensile strength and low yield point with improved formability (s
23、ee ISO 14590). 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. ISO 6892, M
24、etallic materials Tensile testing at ambient temperature 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 cold-reduced steel sheet product obtained from hot-rolled descaled steel sheet by cold reducing to the required sheet thickness followed
25、by annealing to recrystallize the grain structure 3.2 skin pass light cold-rolling of the material covered by this International Standard NOTE The purpose of the skin passing is one or more of the following: a) minimize the appearance of coil breaks, stretcher strains and fluting; b) control the sha
26、pe; c) obtain required surface finish suitable for ordering decorative painting. Some increase in hardness and some loss of ductility will result from skin passing. 3.3 resquared steel sheet that may have received an additional shearing operation after being cut to length in an attempt to approach a
27、 true 90 angle at the shear cut NOTE “Resquared” is referred to as “restricted” in some areas of the world. BS ISO 13887:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:26:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 4 Conditions of manufacture 4.1 Steelmaking Unless otherwise agre
28、ed, the processes used in making the steel and in manufacturing cold-reduced steel sheet are left to the discretion of the manufacturer. On request, the purchaser shall be informed of the steelmaking process being used. 4.2 Chemical composition The chemical composition (heat analysis) shall conform
29、to the requirements in Tables 1 and 2. Table 1 Chemical analysis (heat analysis) Grade C % max. (mass fraction) Mn % max. (mass fraction) S % max. (mass fraction) Si % max. (mass fraction) 260Y 0,08 0,60 0,025 0,50 300Y 0,10 0,90 0,025 0,50 340Y 0,11 1,20 0,025 0,50 380Y 0,11 1,20 0,025 0,50 420Y 0,
30、11 1,40 0,025 0,50 490Y 0,16 1,65 0,025 0,60 550Y 0,16 1,65 0,025 0,60 NOTE These steels may contain one or more microalloying elements (such as niobium, titanium and vanadium) up to a total of 0,22 % (mass fraction) maximum or phosphorus up to 0,30 % maximum. Table 2 Limits on additional chemical e
31、lements Element Cu a % max. (mass fraction) Ni a % max. (mass fraction) Cr a b % max. (mass fraction) Mo a b % max. (mass fraction) Heat analysis 0,20 0,20 0,15 0,06 Product analysis 0,23 0,23 0,19 0,07 Each of the elements listed in this table shall be included in the report of the heat analysis. W
32、hen the amount of copper, nickel, chromium or molybdenum present is less than 0,02 %, the analysis may be reported as 0,15 to u 0,40 0,03 0,04 Mn 0,60 to u 1,15 1,15 to u 1,70 0,04 0,05 S u 0,06 0,10 Si 0,30 to u 0,60 0,05 NOTE The above maximum tolerance is the allowable excess over the specified r
33、equirement and not the heat analysis. For example, for Grade 300Y the following product analysis values are within these tolerances: C 0,13 %; Mn 0,94 %; S 0,125 %; and Si 0,55 %. BS ISO 13887:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:26:27 GMT+00:00 2006, Uncontrolled Copy, (c)
34、 BSI 4 Table 4 Mechanical properties Percentage elongation at fracture E % min. Grade Yield stress eL min. N/mm2 Tensile strength m min. N/mm2 Gauge length on test piece L0 = 50 mm Gauge length on test piece L0 = 80 mm 260Y 260 350 28 26 300Y 300 380 26 24 340Y 340 410 24 22 380Y 380 450 22 20 420Y
35、420 490 20 18 490Y 490 550 16 14 550Y 550 620 12 10 NOTE 1 N/mm2 = 1 MPa. 4.7 Surface condition The condition of the surface of cold-reduced steel sheet is not required to be the same for unexposed parts as it is for exposed parts. Surface condition of sheet for unexposed parts may contain pores, so
36、me slight pitting, small markings, light scratches, and a light discoloration. The surface of sheet for exposed parts shall be reasonably free of these conditions. Unless otherwise agreed, only one side is inspected. 4.8 Surface finish Cold-reduced steel sheet is normally produced in a matt finish,
37、dull in appearance, which is suitable for ordinary decorative painting but is not recommended for electroplating. When cold-reduced steel sheet is deformed during fabrication, localized areas may be roughened to some degree and such affected portions of the part might require hand finishing to prepa
38、re the surface for the intended application. 4.9 Oiling As a deterrent to rusting, a coating of oil is usually applied to cold-reduced steel sheet. The oil is not intended as a drawing or forming lubricant and should be easily removable with degreasing chemicals. Cold-reduced steel sheet may be orde
39、red not oiled, if required, in which case the supplier has limited responsibility if oxidation occurs. 5 Dimensional tolerances 5.1 Dimensional tolerances shall be shown in Tables 5 to 12, inclusive. 5.2 Restricted thickness tolerances are given in Table 6. BS ISO 13887:2004 Licensed Copy: sheffield
40、un sheffieldun, na, Mon Nov 27 07:26:27 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 6 Sampling tensile test One representative sample for the tensile test required in Table 1 or 2 shall be taken from each lot of sheet for shipment. A lot consists of 50 t or less of sheet of the same grade rolled to
41、 the same thickness and condition. 7 Mechanical property tests tensile test The tensile test shall be carried out in accordance with the requirements of ISO 6892. Transverse test pieces shall be taken midway between the center and edge of the sheet as rolled. 8 Retests 8.1 Machining and flaws If any
42、 test piece shows defective machining or develops flaws, it shall be discarded and another test piece substituted. 8.2 Additional tests If a test does not give the specified results, two additional tests shall be carried out at random on the same lot. Both retests shall conform to the requirements o
43、f this International Standard, otherwise the lot may be rejected (see Clause 9). 9 Resubmission The manufacturer may resubmit for acceptance the products that have been rejected during earlier inspection because of unsatisfactory properties, after he has subjected them to a suitable treatment (selec
44、tion, heat treatment) which, on request, shall be indicated to the purchaser. In this case, the tests shall be carried out as if they applied to a new batch. The manufacturer has the right to present the rejected products to a new examination for compliance with the requirements for another grade. 1
45、0 Workmanship The surface condition shall be that normally obtained in this product. The material in cut lengths shall be free from amounts of lamination, surface flaws and other imperfections that are detrimental to the final product or to subsequent appropriate processing. Processing for shipment
46、in coils does not afford the manufacturer the opportunity to observe readily or to remove imperfect portions, as can be done with the cut-length product. 11 Inspection and acceptance While not usually required for products covered by this International Standard, when the purchaser specifies that ins
47、pection and test for acceptance be observed prior to shipment from the manufacturers works, the manufacturer shall afford the purchasers inspector all reasonable facilities to determine that the steel is being furnished in accordance with this International Standard. Steel that is reported to be def
48、ective after arrival at the users works shall be set aside, properly and correctly identified and adequately protected. The supplier shall be notified in order that he may properly investigate. BS ISO 13887:2004 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 07:26:27 GMT+00:00 2006, Uncontro
49、lled Copy, (c) BSI 6 12 Coil size When the product is ordered in coils, a minimum or range of acceptable inside diameter (ID) shall be specified. In addition, the maximum outside diameter (OD) and the maximum acceptable coil mass shall be specified. 13 Marking Unless otherwise stated, the following minimum requirements for identifying the steel shall be legibly stencilled on the top of each lift or shown on a tag attached to each coil or shipping unit: a) the number of this In
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