1、BSI Standards PublicationBS ISO 6932:2014Cold-reduced carbon steelstrip with a maximum carboncontent of 0,25 %BS ISO 6932:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 6932:2014.The UK participation in its preparation was entrusted to Technical Committee
2、 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 contract. Users are responsible for its correct app
3、lication. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 82440 1ICS 77.140.50Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Com
4、mittee on 31 May 2014.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 6932:2014 ISO 2014Cold-reduced carbon steel strip with a maximum carbon content of 0,25 %Feuillards en acier au carbone lamins froid avec une teneur maximale en carbone gale 0,25 %INTERNATIONAL STA
5、NDARDISO6932Fourth edition2014-03-15Reference numberISO 6932:2014(E)BS ISO 6932:2014ISO 6932:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or
6、by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-121
7、1 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 6932:2014ISO 6932:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Dimensions . 25 Chemical compos
8、ition . 25.1 General . 25.2 Heat analysis . 25.3 Product analysis . 26 Conditions of manufacture 46.1 Physical properties 46.2 Steelmaking . 46.3 Weldability 76.4 Application . 76.5 Mechanical properties 76.6 Oiling 76.7 Edges 76.8 Surface finish 87 Dimensional and shape tolerances . 88 Sampling Har
9、dness or tensile test .119 Mechanical property tests .119.1 Hardness test . 119.2 Tensile test . 1110 Retests 1210.1 Machining and flaws 1210.2 Additional tests 1211 Resubmission 1212 Workmanship .1213 Inspection and acceptance 1214 Coil size 1215 Marking .1216 Information to be supplied by the purc
10、haser13Bibliography .14BS ISO 6932:2014ISO 6932:2014(E)ForewordISO (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.
11、Each member 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 Internat
12、ional Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the differe
13、nt types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall n
14、ot be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is i
15、nformation given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) se
16、e the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill flat rolled products.This fourth edition cancels and replaces the third edition (ISO 6932:2008), which has been technically revised.iv ISO 201
17、4 All rights reservedBS ISO 6932:2014INTERNATIONAL STANDARD ISO 6932:2014(E)Cold-reduced carbon steel strip with a maximum carbon content of 0,25 %1 ScopeThis International Standard describes cold-reduced carbon steel strip with a maximum mass fraction of carbon of 0,25 %, furnished to two levels of
18、 closer tolerances than cold-reduced carbon steel sheet, with specific quality, specific hardness requirements or mechanical properties, specific edge, and specific finish.NOTE This International Standard does not apply to the product in narrow widths known as cold-reduced carbon steel sheet slit fr
19、om wider widths (see ISO 3574), nor does it include cold-reduced carbon steel strip with a mass fraction of carbon over 0,25 % (see ISO 4960).Cold-reduced carbon steel strip is produced with a maximum mass fraction of the specified carbon not exceeding: 0,15 % for material specified to mechanical pr
20、operties; 0,25 % for material specified to temper (hardness) requirements.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated refer
21、ences, the latest edition of the referenced document (including any amendments) applies.ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test methodISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test methodISO 6892-1, Metallic materials Tensile testing Part 1: Method of te
22、st at room temperature3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1cold-reduced carbon steel stripproduct manufactured from hot-rolled, descaled coils by cold reducing to the desired thickness on a single-stand mill or on a tandem mill consis
23、ting of several single stands in series3.2cold reductionprocess of reducing the thickness of the strip at room temperature whereby the amount of reduction is greater than that used for a skin pass (3.8)3.3aluminium killedsteel which has been deoxidized with aluminium sufficient to prevent the evolut
24、ion of gas during solidification ISO 2014 All rights reserved 1BS ISO 6932:2014ISO 6932:2014(E)3.4annealingprocess of heating to, and holding at, a suitable temperature and then cooling at a suitable rate for such purposes as lowering hardness, facilitating cold working, producing a desired microstr
25、ucture or obtaining desired mechanical, physical, or other properties3.5temperdesignation by number or term to indicate the hardness as a minimum, as a maximum, or as a rangeNote 1 to entry: The tempers are obtained by the selection and control of chemical composition by amounts of cold reduction (3
26、.2), by thermal treatment, and by a skin pass.3.6dead softcondition describing annealed strip produced without definite control of stretcher strains or flutingNote 1 to entry: It is suitable for drawing and other applications where such surface characteristics are not objectionable.3.7surface finish
27、degree of smoothness or lustre of the strip3.8skin passlight cold rolling of the product resulting in an increase in hardness and some loss in ductilityNote 1 to entry: The purpose of skin passing is to minimize the appearance of coil breaks, stretcher strains and fluting, or to control the shape, o
28、r to obtain the required surface finish (3.7).3.9lotsample portion consisting of 50 t or less of strip of the same designation rolled to the same thickness and temper (3.5) or mechanical properties4 DimensionsThis product is commonly produced in thicknesses of 6 mm and under, and in widths of up to
29、600 mm, in coils and cut lengths.5 Chemical composition5.1 GeneralThe chemical composition (heat analysis) shall not exceed the values given in Tables 1 and 2.5.2 Heat analysisAn analysis of each heat of steel shall be made by the manufacturer to determine compliance with the requirements of Tables
30、1 and 2. When requested at the time of ordering, this analysis shall be reported to the purchaser or his representative.5.3 Product analysisA product analysis can be made by the purchaser to verify the specified analysis of the product and shall take into consideration any normal heterogeneity.The p
31、roduct analysis tolerances shall be in accordance with Tables 2 and 3.2 ISO 2014 All rights reservedBS ISO 6932:2014ISO 6932:2014(E)Table 1 Chemical composition (heat analysis)Mass fractions in per centTemper or quality designationCarbon (C) max.Manganese (Mn) max.Phosphorus (P) max.Sulfur (S) max.T
32、emper No. 1, 2, 3 0,25 0,60 0,035 0,04Temper No. 4, 5 0,15 0,60 0,035 0,04CR21 0,15 0,60 0,05 0,035CR22 0,10 0,50 0,04 0,035CR23 0,08 0,45 0,03 0,03CR24 0,06 0,45 0,03 0,03Table 2 Limits on additional chemical elementsaMass fractions in per centElementHeat analysis max.Product analysis max.Cub0,20 0
33、,23Nib0,20 0,23Crb c0,15 0,19Mob c0,06 0,07Nbd0,008 0,018Vd0,008 0,018Tid0,008 0,018aEach of the elements listed in this table shall be included in the report of the heat analysis. When the amount of copper, nickel, chromium, or molybdenum present is less than 0,02 %, the analysis can be reported as
34、 “0,15 to 0,250,030,04Manganese 0,60 0,03Phosphorus 0,05 0,01Sulfur 0,04 0,01NOTE The above maximum tolerance is the allowable excess over the specified requirements not the heat analysis. ISO 2014 All rights reserved 3BS ISO 6932:2014ISO 6932:2014(E)6 Conditions of manufacture6.1 Physical propertie
35、s6.1.1 Either temper requirements in accordance with Table 4 or mechanical properties in accordance with Table 5 can be specified as given in this International Standard, but not both, since there is no direct correlation.6.1.2 Cold-reduced carbon steel strip specified to temper requirements is prod
36、uced to the following temper designations: No. 1 (hard); No. 2 (half hard); No. 3 (quarter hard); No. 4 (skin-passed); No. 5 (dead soft).6.1.3 Cold-reduced carbon steel strip specified to mechanical properties is produced to the following commercial and drawing quality designations: CR21 (commercial
37、 quality); CR22 (drawing quality); CR23 (deep drawing quality); CR24 (deep drawing quality aluminium killed).6.2 SteelmakingUnless otherwise agreed by the interested parties, the processes used in making the steel and in manufacturing cold-reduced carbon strip are left to the discretion of the manuf
38、acturer. On request, the purchaser shall be informed of the steelmaking process being used.4 ISO 2014 All rights reservedBS ISO 6932:2014ISO 6932:2014(E)Table 4 Temper and hardness requirements for cold-reduced carbon steel stripTemperThickness e mmHardnessRockwell B scale HRBRockwell 30T scale HR30
39、TRockwell 15T scale HR15TVickers HVNo. 1(hard)e 0,360,36 1,084 min.73,1 min.88,2 min.170 min.170 min.162 min.No. 2(half hard)e 0,360,36 1,070 to 8963,5 to 75,883,5 to 89,5125 to 185125 to 185125 to 185No. 3(quarter hard)e 0,360,36 1,060 to 8056,5 to 69,780 to 86,6107 to 150107 to 150107 to 150No. 4a
40、(skin-passed)e 0,360,36 1,065 max.60 max.82 max.116 max.116 max.116 max.No. 5a(dead soft)e 0,360,36 1,055 max.53 max.78,5 max.100 max.100 max.100 max.aCan be ordered with a carbon range of 0,15 % to 0,25 %. In each instance, the maximum hardness requirement is established by agreement. ISO 2014 All
41、rights reserved 5BS ISO 6932:2014ISO 6932:2014(E)Table 5 Mechanical property requirements for cold-reduced carbon steel stripaQuality designationCondition of deliverybRemax.cMPaRmdMPaA min. %Lo= 80 mmeLo= 50 mmCR21 HKfTCHK270HK290HK390HK490HK590HK690410 max.410 max.290 to 430390 to 540490 to 640590
42、to 740690 min.282818323224CR22 TCHK270HK290HK390HK490HK590250355370 max.370 max.290 to 410390 to 510490 to 620590 min.323221535352513CR23 TCHK270HK290HK390HK490HK590225 g325350 max.350 max.290 to 390390 to 490490 to 600590 min.363623638382714CR24 TCHK270HK290HK390HK490HK590225 g325350 max.350 max.29
43、0 to 390390 to 490490 to 590590 to 690363623638382714aLongitudinal test pieces:Reyield strength;Rmtensile strength;A percentage elongation after fracture;Logauge length on test piece.bConditions of delivery: HK, cold-reduced; TC, annealed; HK270, skin-passed; HK290 to HK690, cold-reduced, various am
44、ounts.cFor thicknesses of 0,7 mm and less, the specified maximum yield strength values are increased by 20 MPa.dMinimum tensile strength values for delivery conditions HK, TC and HK270 would normally be expected to be 270 MPa.eMinimum elongation values are reduced by 2 % for thicknesses of 0,5 mm to
45、 0,7 mm inclusive and by 4 % for thicknesses of less than 0,5 mm.fThere are no mechanical property requirements for this condition.gFor thicknesses of 1,5 mm and greater, the maximum yield strength is 235 MPa.6 ISO 2014 All rights reservedBS ISO 6932:2014ISO 6932:2014(E)6.3 WeldabilityThis product i
46、s suitable for welding if appropriate welding conditions are selected. As carbon content increases above 0,15 %, spot welding becomes increasingly difficult.6.4 ApplicationIt is desirable that cold-reduced carbon steel strip be identified for fabrication by the name of the part or by intended applic
47、ation, which shall be compatible with the temper or mechanical properties specified. Proper identification of the part might include visual examination, prints or description, or a combination of these.6.5 Mechanical properties6.5.1 HardnessWhen the temper designation is specified at the time the st
48、eel is made available for shipment, the hardness shall be as stated in Table 4 when it is determined on test pieces obtained in accordance with the requirements of Clause 7.6.5.2 Tensile propertiesWhen the mechanical property designation is specified at the time the steel is made available for shipm
49、ent, the tensile properties shall be as stated in Table 5 when they are determined on test pieces obtained in accordance with the requirements of Clause 8.6.6 OilingAs a deterrent to rusting, a coating of oil is usually applied to the product. The oil is not intended as a drawing or forming lubricant and should be easily removable with degreasing chemicals. The product can be ordered not oiled, if required, in which case the sup
