1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 15177:2012Hot-rolled twin-roll cast carbonsteel sheet of commercialqualityBS ISO 15177:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation
2、 of ISO 15177:2012.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/109, Coated and Uncoated Flat Products to be Usedfor Cold Forming.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to i
3、nclude all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 72827 3ICS 77.140.50Compliance with a British Standard cannot confer immunity fromlegal obligations.This Br
4、itish Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2012.Amendments issued since publicationDate Text affectedBS ISO 15177:2012 ISO 2012Hot-rolled twin-roll cast carbon steel sheet of commercial qualityTles en acier de qualit commerciale lamines
5、 chaud par coule entre cylindresINTERNATIONAL STANDARDISO15177First edition2012-03-15Reference numberISO 15177:2012(E)BS ISO 15177:2012ISO 15177:2012(E)ii ISO 2012 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2012All rights reserved. Unless otherwise specified, no part of this publication may
6、 be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 4
7、1 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 15177:2012ISO 15177:2012(E) ISO 2012 All rights reserved iiiContents PageForeword iv1 Scope 12 Normative references . 13 Terms and definitions . 14 Thickness 25 Other information 26 Surface charac
8、teristics 26.1 Surface condition 26.2 Skin passing . 26.3 Oiling . 27 Conditions of manufacture . 37.1 Steelmaking 37.2 Chemical composition . 37.3 Chemical analysis . 37.4 Weldability . 47.5 Application 47.6 Mechanical properties 48 Dimensional tolerances . 49 Tensile test sampling 510 Tensile test
9、 511 Retests . 511.1 Machining and flaws . 511.2 Elongation . 511.3 Additional tests 512 Resubmission . 513 Workmanship 514 Inspection and acceptance . 515 Coil size 616 Marking . 617 Information to be supplied by the purchaser 6Bibliography . 8BS ISO 15177:2012ISO 15177:2012(E)ForewordISO (the Inte
10、rnational 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 member body interested in a subject for which a technical committee has
11、 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 Electrotechnical Commission (IEC) on all matters of electrotechnical s
12、tandardization.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 adopted by the technical committees are circulated to the member bodies f
13、or 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 patent rights. ISO shall not be held responsible for identifying any or al
14、l such patent rights.ISO 15177 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill flat rolled products.iv ISO 2012 All rights reservedBS ISO 15177:2012INTERNATIONAL STANDARD ISO 15177:2012(E)Hot-rolled twin-roll cast carbon steel sheet of commercial quality1 Sc
15、opeThis International Standard specifies the characteristics of hot-rolled twin-roll cast carbon steel sheet of commercial quality produced by the twin-roll cast process. Hot-rolled twin-roll cast steel sheet is suitable for many applications where the presence of oxide or scale or normal surface im
16、perfections disclosed after removal of oxide or scale, are not objectionable. It is not suitable for applications where the surface is of prime importance.NOTE A steel sheet that is subjected to subsequent re-rolling is not covered by this International Standard.Commercial quality twin-roll cast ste
17、el sheet is intended for general fabrication purposes where sheet is used in the flat condition or for bending, moderate forming and welding operations.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edit
18、ion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperatureISO 16160, Hot-rolled steel sheet products Dimensional and shape tolerances3 Terms and
19、definitionsFor the purposes of this document, the following terms and definitions apply.3.1hot-rolled descaled steel sheethot-rolled steel sheet from which oxide or scale has been removed, commonly by pickling in an acid solution or by appropriate mechanical means such as grit blastingNOTE Some chan
20、ges in properties can result from descaling.3.2skin passlight cold rolling of hot-rolled steel sheet or hot-rolled descaled steel sheet3.3mill edgenormal side edge without any definite contour produced in hot rollingNOTE Mill edges may contain some irregularities, such as cracked or torn edges or th
21、in (feathered) edges.3.4sheared edgenormal edge obtained by shearing, slitting or trimming a mill edge productNOTE Normal processing does not necessarily provide a definite positioning of the slitting.3.5twin-roll cast steel sheetsteel sheet produced by casting to near final thickness directly from
22、the liquid metal with minimal hot rolling to achieve the final thickness ISO 2012 All rights reserved 1BS ISO 15177:2012ISO 15177:2012(E)3.6breakage allowanceagreed-upon level of acceptable breakage not subject to claim4 Thickness4.1 Hot-rolled twin-roll cast sheet of commercial quality sheet is pro
23、duced in thicknesses of 0,7 mm to 2,0 mm, inclusive, and in widths of up to 2 000 mm in coils and cut lengths.4.2 Hot-rolled twin-roll cast sheets less than 600 mm wide may be slit from wide sheets and may be considered sheets.5 Other information5.1 Some increase in hardness and some loss of ductili
24、ty may result from descaling if mechanical means, such as grit blasting are used.5.2 The purchaser should state whether descaling is required.6 Surface characteristics6.1 Surface conditionThe sheets shall not have slivers, seams, cracks or scratches, which can adversely affect their use. Also, oxide
25、 or scale on hot-rolled steel sheet is subject to variations in thickness, adherence and colour. Removal of the oxide or scale by pickling or blast cleaning can disclose surface imperfections not readily visible prior to this operation. Furthermore, after drawing, imperfections, which were not appar
26、ent in the flat sheet, can be visible.Pores, small pits, small marks, scratches, kinks from pay-off reels and slight coloration are permitted. Defects shall not be of such an extent that they run the risk of causing failure or damage to tooling or of creating welding difficulties.In the case of deli
27、very of coil and slit coil, the percentage of defects can be greater than in the case of delivery in sheet or cut lengths. The purchaser should take this into account and the percentage of admissible surface defects may be agreed upon at the time of the enquiry and order. Unless otherwise agreed, a
28、single surface of the product shall comply with the specified requirements. The other surface shall be such that, during subsequent treatment, it does not have a deleterious effect on the better surface.6.2 Skin passingThe purpose of skin passing is one or more of the following:a) to minimize, tempo
29、rarily, the appearance of coil breaks, stretcher strains (Luders lines) or fluting during the fabrication of finished parts;b) to obtain the required surface finish suitable for ordinary decorative painting;c) to control the shape.NOTE Some increase in hardness and some loss in ductility can result
30、from skin passing. It is the responsibility of the purchaser to state whether or not skin passing is required.6.3 OilingAs a deterrent to rusting, a coating of rust-preventative oil is usually applied to hot-rolled descaled twin-roll cast steel sheet, but may be furnished not oiled, if required. Thi
31、s oil is not intended as a drawing or forming lubricant 2 ISO 2012 All rights reservedBS ISO 15177:2012ISO 15177:2012(E)and should be easily removable with degreasing chemicals. On request, the manufacturer shall advise the purchaser which type of oil has been used. Hot-rolled-descaled twin-roll cas
32、t steel sheet may be ordered not oiled, if required; in which case, the supplier has limited responsibility if oxidation occurs.7 Conditions of manufacture7.1 SteelmakingThe processes used in making the steel are left to the discretion of the manufacturer. On request, the purchaser shall be informed
33、 of the steel-making process being used.7.2 Chemical compositionThe chemical composition (heat analysis) shall not exceed the values given in Tables 1 and 2.Table 1 Chemical composition Heat analysis Mass fractions in per centDesig- nationQuality Cmax.Mnmax.Pmax.Smax.SiaHRA Commercial 0,15 0,70 0,04
34、5 0,035 aIn this table, “” indicates that there is no requirement, but the analysis shall be reported.Table 2 Limits on additional chemical elements Mass fractions in per centElement Cumax.Nimax.Crmax.Momax.Nbmax.Vmax.Timax.Heat analysis 0,50 0,30 0,30 0,15 0,008 0,008 0,008Product analysis 0,53 0,3
35、3 0,34 0,16 0,018 0,018 0,018NOTE Each of the elements listed in this table shall be included in the report of the heat analysis. Where the amount of copper, nickel, chromium or molybdenum present is less than 0,02 %, the analysis shall be reported as 0,02 %.7.3 Chemical analysis7.3.1 Heat analysisA
36、n analysis of each heat of steel shall be made by the manufacturer to determine compliance with the requirements of Tables 1 and 2. If requested, this analysis shall be reported to the purchaser or his/her representative.7.3.2 Product analysisA product analysis may be made by the purchaser to verify
37、 the specified analysis of the semi-finished or finished steel. The product analysis tolerances shall be in accordance with Table 3. ISO 2012 All rights reserved 3BS ISO 15177:2012ISO 15177:2012(E)Table 3 Product analysis tolerancesElement Maximum of specified element%Tolerance over the maximum spec
38、ified%Carbon 0,15 0,03Manganese 0,70 0,04Phosphorus 0,045 0,01Sulfur 0,035 0,01NOTE The maximum tolerance in this table is the allowable excess over the specified requirement and not the heat analysis.7.4 WeldabilityThis product is normally suitable for welding if appropriate welding conditions are
39、selected. For undescaled steel, it may be necessary to remove the scale or oxide depending upon the welding method.7.5 ApplicationIt is desirable that hot-rolled twin-roll cast steel sheet be identified for fabrication by the name of the part or by the intended application. Hot-rolled twin-roll cast
40、 commercial quality steel sheet (HRA) may be produced to make an identified part within a properly established breakage allowance, which shall be previously agreed between the manufacturer and the purchaser. In this case, the part name, the details of fabrication and special requirements shall be sp
41、ecified, and the mechanical properties in Table 4 do not apply.7.6 Mechanical propertiesExcept where ordered according to an identified part as explained in 7.5, the mechanical properties of commercial quality shall be as given in Table 4 where they are determined on test pieces obtained in accordan
42、ce with the requirements of Clause 9. Prolonged storage of the sheet can cause a change in the mechanical properties (increase in hardness and a decrease in elongation), leading to a decrease in formability.Table 4 Mechanical property requirements for hot-rolled twin-roll cast commercial-quality car
43、bon steel sheetDesignation Name Rmmax.Amin., %e 2MPa Lo= 50 mm Lo= 80 mmHRA Commercial 470 20 19RmaLoetensile strengthpercentage elongation after fracturegauge length of original test piecethickness of steel sheet, in millimetres1 MPa = 1 N/mm2.8 Dimensional tolerancesDimensional and shape tolerance
44、s applicable to hot-rolled steel sheet shall be as given in ISO 16160.Restricted thickness tolerances are given in ISO 16160.4 ISO 2012 All rights reservedBS ISO 15177:2012ISO 15177:2012(E)9 Tensile test samplingOne representative sample for the tensile test in Table 4, where specified, shall be tak
45、en from each lot of sheet for shipment. A lot consists of 50 t, or less, of sheet of the same designation rolled to the same thickness and condition.10 Tensile testThe tensile test shall be carried out in accordance with ISO 6892-1. Transverse test pieces shall be taken midway between the centre and
46、 the edge of the sheet as rolled.11 Retests11.1 Machining and flawsIf any test piece shows defective machining or develops flaws, it shall be discarded and another test piece substituted.11.2 ElongationIf the percentage elongation of any test piece is less than that specified in Table 4 and if any p
47、art of the fracture is outside the middle half of the gauge length as scribed before the test, the test shall be discarded and a retest shall be carried out.11.3 Additional testsIf a test does not give the specified results, two additional tests shall be carried out at random on the same lot. Both r
48、etests shall conform to the requirements of this International Standard; otherwise, the lot may be rejected.12 ResubmissionThe manufacturer may resubmit, for acceptance, the products that have been rejected during earlier inspection because of unsatisfactory properties after he/she has subjected the
49、m to a suitable treatment, for example selection and 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 subject the rejected products to a new examination for compliance with the requirements for another grade.13 WorkmanshipThe surface condition shall be that normally obtained in a hot-rolled twin-roll cast product or hot-rolled descaled product.The steel sheet in cut lengths shall be free from
