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1、A Reference number ISO 3573:1999(E) INTERNATIONAL STANDARD ISO 3573 Third edition 1999-06-01 Hot-rolled carbon steel sheet of commercial and drawing qualities Tles en acier au carbone lamines chaud de qualit commerciale et pour emboutissage Copyright International Organization for Standardization Pr
2、ovided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:25:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3573:1999(E) ISO 1999 All rights reserved. Unless otherwise specified, no part of this publication may
3、 be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 CH-1211 Genve 20 Switzerland Internetisoiso.ch Printed in Switzerla
4、nd ii 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 member body interested in a subject for whi
5、ch 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 Electrotechnical Commission (IEC) on all m
6、atters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Stan
7、dard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 3573 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 3573:1986) whic
8、h has been technically revised. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:25:05 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL S
9、TANDARD ISOISO 3573:1999(E) 1 Hot-rolled carbon steel sheet of commercial and drawing qualities 1 Scope 1.1 This International Standard applies to hot-rolled carbon steel sheet of commercial and drawing qualities. Hot-rolled steel sheet is suitable for many applications where the presence of oxide o
10、r scale, or normal surface imperfections disclosed after removal of oxide or scale, are not objectionable. It is not suitable for applications where surface is of prime importance. NOTE 1Hot-rolled sheet up to but not including 3 mm in thickness is commonly known as sheet. Hot-rolled sheet 3 mm and
11、over in thickness is commonly known as either sheet or plate. NOTE 2Steel sheet that is to be subjected to subsequent rerolling is not covered by this International Standard. 1.2 Commercial quality sheet (HR1) is intended for general fabricating purposes where sheet is used in the flat or for bendin
12、g, moderate forming and welding operations. It is commonly produced in the range of thickness 0,8 mm to 12,5 mm inclusive, and in widths of 600 mm and over, in coils and cut lengths. 1.3 Drawing quality sheet (HR2, HR3, HR4) is intended for drawing or severe forming, including welding. It is commonl
13、y produced in the range of thickness 0,8 mm to 12,5 mm inclusive, and in widths of 600 mm and over, in coils and cut lengths. Drawing quality sheet shall be furnished to all the requirements of this International Standard, or, by agreement when ordered, to fabricate an identified part, in which case
14、 the mechanical properties in Table 2 do not apply. Drawing qualities are identified as follows: HR2 drawing quality HR3 deep drawing quality HR4 deep drawing quality aluminum killed 1.4 Hot-rolled sheet less than 600 mm wide may be slit from wide sheet and will be considered as sheet. 2 Normative r
15、eference The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, this publication do not apply. However, parties to agreements based on this Inte
16、rnational Standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid Inter
17、national Standards. ISO 6892:1998, Metallic materials Tensile testing at ambient temperature. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:25:05 MDTNo reproduction or netwo
18、rking permitted without license from IHS -,-,- ISO 3573:1999(E) ISO 2 3 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 3.1 hot-rolled steel sheet product obtained by rolling heated steel through a continuous-type strip mill to the re
19、quired sheet thickness and tolerances, the product having a surface covered with oxide or scale resulting from the hot-rolling operation 3.2 hot-rolled descaled steel sheet hot-rolled steel sheet from which oxide or scale has been removed, commonly by pickling in an acid solution or by mechanical me
20、ans such as grit blasting NOTE Some change in properties may result from descaling. 3.3 skin pass: light cold-rolling of hot-rolled steel sheet or hot-rolled descaled steel sheet 3.4 edges Material is normally supplied as described in 3.4.1 and 3.4.2. Other edges may be supplied as agreed upon. 3.4.
21、1 mill edge normal side edge without any definite contour produced in hot-rolling possibly containing some irregularities such as cracked or torn edges or thin (feathered) edges 3.4.2 sheared edge normal edge obtained by shearing, slitting, or trimming a mill edge product NOTE Normal processing does
22、 not necessarily provide a definite positioning of the slitting burr. 3.5 aluminum killed steel which has been deoxidized with aluminum sufficient to prevent the evolution of gas during solidification 4 Other Information 4.1 Descaling Some increase in hardness and some loss of ductility may result f
23、rom descaling, if mechanical means such as grit blasting is used. The purchaser should state whether descaling is required. 4.2 Surface condition Oxide 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 c
24、leaning may disclose surface imperfections not readily visible prior to this operation. Also, after drawing, imperfections may be visible which were not apparent in the flat sheet. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical
25、 Standards 1/9972545001 Not for Resale, 04/21/2007 02:25:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO ISO 3573:1999(E) 3 4.3 Skin pass The purpose of skin passing is one or more of the following: a) to temporarily minimize the appearance of coil breaks, stretcher
26、strains (Lders lines) or fluting during fabrication of finished parts; b) to obtain the required surface finish suitable for ordinary decorative painting; c) to control the shape. Some increase in hardness and some loss of ductility will result from skin passing. The purchaser should state whether s
27、kin passing is required. 4.4 Oiling As a deterrent to rusting, a coating of oil is usually applied to hot-rolled descaled steel sheet, but sheet may be furnished not oiled if required. The oil is not intended as a drawing or forming lubricant and should be easily removable with degreasing chemicals.
28、 On request, the manufacturer shall advise the purchaser which type of oil has been used. Hot rolled descaled steel sheet may be ordered not oiled, if required, in which, case, the supplier has limited responsibility, if oxidation occurs. 5 Conditions of manufacture 5.1 Steelmaking The processes use
29、d in making the steel and in manufacturing hot-rolled sheet are left to the discretion of the manufacturer. On request, the purchaser shall be informed of the steelmaking process being used. 5.2 Chemical composition The chemical composition (heat analysis) shall not exceed the values given in Table
30、1. Table 1 Chemical composition (heat analysis) Content levels in percent by mass Quality C max. Mn max. P max. S max. DesignationName HR1Commercial0,120,600,0450,045 HR2Drawing0,100,450,0350,035 HR3Deep drawing0,080,400,0300,030 HR4Deep drawing aluminum killed0,080,350,0250,025 Copyright Internatio
31、nal Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:25:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3573:1999(E) ISO 4 5.3 Chemical analysis 5.3.1 Heat analysis An
32、 analysis of each heat of steel shall be made by the manufacturer to determine the percentage by mass of carbon, manganese, phosphorus and sulfur. On request, this analysis shall be reported to the purchaser or to his representative. 5.3.2 Product analysis A product analysis may be made by the purch
33、aser to verify the specified analysis of the semi-finished or finished steel and shall take into consideration any normal heterogeneity. Non-killed steels (such as rimmed or capped) are not technologically suited to product analysis. For killed steels, the sampling method and deviation limits shall
34、be agreed upon between the manufacturer and purchaser at the time of ordering. 5.4 Weldability The product is normally suitable for welding if appropriate welding conditions are selected. For undescaled steel, it may be necessary to remove the scale or oxide depending upon the welding method. 5.5 Ap
35、plication It is desirable that hot-rolled steel sheet be identified for fabrication by the name of the part or by the intended application. Hot-rolled steel sheet (HR1, HR2, HR3, HR4) may be produced to make an identified part within a properly established breakage allowance, which shall be previous
36、ly agreed upon between the manufacturer and purchaser. In this case part name, details of fabrication and special requirements (freedom from stretcher strain or fluting) shall be specified and the mechanical properties in Table 2 do not apply. 5.6 Mechanical properties Except when ordered to an iden
37、tified part, as explained in 5.5, at the time that the steel is made available for shipment, the mechanical properties shall be as given in Table 2, when they are determined on test pieces obtained in accordance with the requirements of clause 8. Prolonged storage of the sheet can cause a change in
38、the mechanical properties (increase in hardness and a decrease in elongation), leading to a decrease in drawability. To minimize this effect, quality HR4 should be specified. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Stand
39、ards 1/9972545001 Not for Resale, 04/21/2007 02:25:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO ISO 3573:1999(E) 5 Table 2 Mechanical property requirements for hot-rolled carbon steel sheet a Base metal quality Rm b max. N/mm2 A c,d min. % e , 33 e 6 DesignationNa
40、meLo = 80 mmLo = 50 mmLo = 5,65SoLo = 50 mm HR1 e Commercial44023242829 HR2Drawing42025263031 HR3Deep drawing40028293334 HR4Deep drawing aluminium killed 38031323637 a Rmtensile strength Apercentage elongation after fracture Logauge length on test piece Sooriginal cross sectional area of gauge lengt
41、h ethickness of steel sheet, in millimetres 1 N/mm2 = 1 MPa b Minimum tensile strength for qualities HR1, HR2, HR3 and HR4 would normally be expected to be 270 N/mm2. Where minimum tensile strength is required, the value of 270 N/mm2 may be specified. All tensile strength values are determined to th
42、e nearest 10 N/mm2. c The non-proportional test piece with a fixed original gauge length (50 mm), up to 6 mm thick sheet can be used in conjunction with a conversion table. In case of dispute, however, only the results obtained on a proportional test piece will be valid for material 3 mm and over in
43、 thickness. d For materials over 6 mm in thickness, values for elongation are subject to agreement between the manufacturer and purchaser. e Refer to 5.5. 6 Dimensional tolerances Dimensional tolerances applicable to hot-rolled steel sheet shall be as given in Tables 3 to 11 inclusive. Restricted th
44、ickness tolerances are given in Table 4. 7 Tensile test sampling One representative sample for the tensile test required in Table 2 shall be taken 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. 8 Tensil
45、e test The tensile test shall be carried out in accordance with ISO 6892. Transverse test pieces shall be taken midway between the centre and edge of the sheet as rolled. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards
46、 1/9972545001 Not for Resale, 04/21/2007 02:25:05 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3573:1999(E) ISO 6 9 Retests 9.1 Machining and flaws If any test piece shows defective machining or develops flaws, it shall be discarded and another test piece substituted
47、. 9.2 Elongation If the percentage elongation of any test piece is less than that specified in Table 2 and if any part 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. 9.3 Additional tests If a t
48、est 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 rejected. 10 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, heat treatment) which, on request, will be indicated to the purchaser. Tests shall be