ISO 6317-2008 Hot-rolled carbon steel strip of commercial and drawing qualities《商业和拉制性的热轧碳钢带》.pdf

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1、 Reference numberISO 6317:2008(E)ISO 2008INTERNATIONAL STANDARD ISO6317Third edition2008-06-01Hot-rolled carbon steel strip of commercial and drawing qualities Feuillards en acier au carbone lamins chaud de qualits commerciale et pour emboutissage ISO 6317:2008(E) PDF disclaimer This PDF file may co

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4、arameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All

5、 rights reserved. Unless otherwise specified, no part of this publication may 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 o

6、f the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedISO 6317:2008(E) ISO 2008 All rights reserved iiiForeword ISO (the International Organi

7、zation 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 been establishe

8、d 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 standardization.

9、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 for voting. Pub

10、lication 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 all such patent

11、 rights. ISO 6317 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 6317:2000), which has been technically revised. INTERNATIONAL STANDARD ISO 6317:2008(E) ISO 2008 All right

12、s reserved 1Hot-rolled carbon steel strip of commercial and drawing qualities 1 Scope 1.1 This International Standard specifies requirements for hot-rolled carbon steel strip of commercial and drawing qualities. NOTE Steel strip that is to be subjected to subsequent rerolling is not covered by this

13、International Standard. Hot-rolled steel strip is suitable for many applications where the presence of oxide or scale, or normal surface imperfections disclosed after removal of oxide or scale, are not objectionable. It is not suitable for applications where the surface is of prime importance. This

14、product is commonly rolled on a narrow strip mill. 1.2 Commercial quality strip (HR1) is intended for general fabrication purposes where strip is used in the flat condition, or for bending, moderate forming and welding operations. It is commonly produced in the range of thicknesses 0,65 mm to 12 mm

15、inclusive, and widths up to 600 mm exclusive, in coils and cut lengths. 1.3 Drawing quality strip (HR2, HR3, HR4) is intended for drawing or severe forming, including welding. It is commonly produced in the range of thicknesses 0,65 mm to 12 mm inclusive, and widths up to 600 mm exclusive, in coils

16、and cut lengths. Drawing quality strip is furnished according to all the requirements of this International Standard or, by agreement when ordered, to fabricate an identified part, in which case, the mechanical properties in Table 2 do not apply. Specific drawing qualities are identified as follows:

17、 HR2 Drawing quality HR3 Deep drawing quality HR4 Deep drawing quality aluminum killed 1.4 Hot-rolled steel strip can also be rolled on a wide continuous mill and slit into narrower coils. However, all attributes of the finished product meet the requirements of this International Standard. 2 Normati

18、ve 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 6892-1, Metallic materials Tens

19、ile testing Part 1: Method of test at room temperature 3 Definitions For the purposes of this document, the following terms and definitions apply. 3.1 aluminum killed steel which has been deoxidized with aluminum sufficiently to prevent the evolution of gas during solidification ISO 6317:2008(E) 2 I

20、SO 2008 All rights reserved3.2 hot-rolled steel strip product obtained usually by rolling heated steel (billet or slab) through a continuous-type mill to the required strip thickness and tolerances NOTE The product has a surface covered with oxide or scale resulting from the hot-rolling operation. 3

21、.3 hot-rolled descaled steel strip hot-rolled steel strip from the surface of which oxide or scale has been removed, commonly by pickling in an acid solution NOTE 1 Descaling may also be performed by mechanical means such as grit blasting. Some increase in hardness and some loss of ductility can res

22、ult from descaling. NOTE 2 This product is normally supplied oiled. 3.4 skin pass light cold rolling of the product NOTE 1 The purpose of the skin pass is one or more of the following: a) to minimize the appearance of coilbreaks, stretcher strains and fluting; b) to control the shape; c) to obtain t

23、he required surface finish. NOTE 2 Some increase in hardness and some loss in ductility will result from skin passing. 3.5 mill edge normal side edge without any definite contour produced in hot rolling. NOTE 1 Mill edges may contain some irregularities, such as cracked or torn edges or thin (feathe

24、red) edges. NOTE 2 A square mill edge can be produced by hot-edge rolling (with the corners not as square as a square-edge bar). 3.6 sheared edge normal edge obtained by shearing, slitting or trimming a mill edge product. NOTE Normal processing does not necessarily provide a definite positioning of

25、the slitting burr. 4 Conditions of manufacture 4.1 Steelmaking The processes used in making the steel and in manufacturing hot-rolled strip 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

26、chemical composition (heat analysis) shall be as agreed upon between the interested parties at the time of ordering. The ranges or limits shall be in accordance with the requirements of Tables 1 and 2 for the designation specified. ISO 6317:2008(E) ISO 2008 All rights reserved 3Table 1 Chemical comp

27、osition (heat analysis) Mass fraction in percent Quality Designation Name C max. Mn max. P max. S max. HR1 Commercial 0,12 0,60 0,030 0,030 HR2 Drawing 0,10 0,45 0,030 0,030 HR3 Deep drawing 0,08 0,40 0,020 0,030 HR4 Deep drawing aluminum killed 0,08 0,35 0,020 0,025 Table 2 Limits on additional che

28、mical elements Mass fraction in percent Elements Heat analysis max. Product analysis max. Cua0,20 0,23 Nia0,20 0,23 Cra, b0,15 0,19 Moa, b0,06 0,07 Nbc0,008 0,018 Vc0,008 0,018 Tic0,008 0,018 aThe sum of copper, nickel, chromium and molybdenum shall not exceed 0,50 % on heat analysis. When one or mo

29、re of these elements is/are specified, the sum does not apply; in which case, only the individual limits on the remaining elements apply. bThe sum of chromium and molybdenum shall not exceed 0,16 % on heat analysis. When one or more of these elements is/are specified, the sum does not apply; in whic

30、h case, only the individual limits on the remaining elements apply. cAnalysis greater than 0,008 % may be supplied after agreement between the producer and consumer. 4.3 Chemical analysis 4.3.1 Heat analysis A heat analysis of each heat of steel shall be made by the manufacturer to determine complia

31、nce with the requirements of Tables 1 and 2. When requested at the time of ordering, this analysis shall be reported to the purchaser or his representative. Each of the elements listed in Table 1 shall be included in the report of the heat analysis. If one or more of the elements in Table 2 is/are s

32、pecified, the analysis shall be reported. 4.3.2 Product analysis A product analysis may be made by the purchaser to verify the specified analysis of the semi-finished or finished steel and shall take into consideration any normal heterogeneity. For killed steels, the sampling method and deviation li

33、mits shall be agreed upon between the interested parties at the time of ordering. The product analysis tolerances shall be in accordance with Table 3. ISO 6317:2008(E) 4 ISO 2008 All rights reservedTable 3 Product analysis tolerances Element Maximum of specified element % Tolerance over maximum spec

34、ified % Carbon u 0,12 0,03 Manganese u 0,60 0,03 Phosphorus u 0,03 0,01 Sulfur u 0,03 0,01 NOTE The maximum tolerance in this table is the allowable excess over the specified requirements, and not the heat analysis. 4.4 Weldability This product is normally suitable for welding if appropriate welding

35、 conditions are selected. For undescaled steel, it may be necessary to remove the scale or oxide, depending upon the welding method. 4.5 Application Hot-rolled steel strip should be identified for fabrication by the name of the part or by the intended application. Hot-rolled steel strip (HR1, HR2, H

36、R3, HR4) may be produced to make an identified part within a properly established breakage allowance which shall be previously agreed upon between the interested parties. In this case, the part name, details of fabrication, and special requirements shall be specified and the mechanical properties in

37、 Table 4 do not apply. 4.6 Mechanical properties Except when ordered according to an identified part, as explained in 4.5, at the time that the steel is made available for shipment, the mechanical properties shall be as given in Table 4 when they are determined on test pieces obtained in accordance

38、with the requirements of Clause 6. Prolonged storage of the strip can cause a change in the mechanical properties (increase in hardness and a decrease in elongation), leading to a decrease in drawabillity. To minimize this effect, quality HR4 should be specified. 4.7 Surface condition Oxide or scale

39、 on hot-rolled steel strip is subject to variations in thickness, adherence and colour. Removal of the oxide or scale by pickling or blast cleaning may disclose surface imperfections not readily visible prior to this operation. Also, after drawing, imperfections may be visible which were not apparen

40、t in the flat strip. 4.8 Oiling As 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 may be ordered not oiled, if required, in which case, the sup

41、plier has limited responsibility if oxidation occurs. 5 Dimensional tolerances Dimensional tolerances applicable to hot-rolled strip shall be in accordance with Table 5 and Tables 7 to 10 inclusive. Restricted thickness tolerances are given in Table 6. ISO 6317:2008(E) ISO 2008 All rights reserved 5

42、It has not been found practical to formulate flatness and out-of-square tolerances for hot-rolled steel strip. 6 Sampling One representative sample for the tensile test required in Table 4 shall be taken from each lot of strip for shipment. A lot consists of 50 t or less of strip of the same designa

43、tion, rolled to the same thickness and condition. 7 Test methods The tensile test shall be carried out in accordance with ISO 6892-1. Longitudinal test pieces shall be taken at the 1/4 point (halfway between the edge and mid-width). 8 Retests 8.1 Machining and flaws If any test piece shows defective

44、 machining or develops flaws, it shall be discarded and another test piece substituted. 8.2 Elongation If the percentage of elongation of any test piece is less than that specified in Table 4, and if any part of the fracture is outside the middle half of the gauge length as scribed before the test,

45、the test shall be discarded and a retest shall be carried out. 8.3 Additional tests If a test does not give the specified results, two more tests shall be carried out at random on the same lot. Both retests shall conform to the requirements of this International Standard; otherwise, the lot may be r

46、ejected. 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 selection (e.g. heat treatment) which, on request, will be indicated to the

47、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 quality. 10 Workmanship The surface condition shall be that normally obtain

48、ed on a hot-rolled product or hot-rolled descaled product. The steel strip in cut lengths shall be free from amounts of laminations, surface flaws and other imperfections that are detrimental to subsequent appropriate processing. Processing for shipment in coils does not afford the manufacturer the

49、opportunity to observe readily or to remove such portions as can be carried out on the cut-length product. ISO 6317:2008(E) 6 ISO 2008 All rights reserved11 Inspection and acceptance While not usually required for products covered by this International Standard, when the purchaser specifies that inspection and tests for acceptance be observed prior to shipment from the manufacturers works, the manufacturer shall provide the purchasers inspector with all reasonable facilities to determine that the steel is being furnished in accordance wi