1、 ISO 2012 Hot-rolled carbon steel sheet of commercial and drawing qualities Tles en acier au carbone lamines chaud de qualit commerciale et pour emboutissage INTERNATIONAL STANDARD ISO 3573 Fifth edition 2012-12-15 Reference number ISO 3573:2012(E) ISO 3573:2012(E)ii ISO 2012 All rights reserved COP
2、YRIGHT PROTECTED DOCUMENT ISO 2012 All 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 belo
3、w or ISOs member body in the country of 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 ISO 3573:2012(E) ISO 2012 All rights reserved iii Contents Page Foreword iv 1 Sc
4、ope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Dimensions . 2 5 Conditions of manufacture 2 5.1 Chemical composition 2 5.2 Descaling 3 5.3 Edges 3 5.4 Skin passing . 3 5.5 Oiling 3 5.6 Weldability 4 5.7 Fabrication qualities. 4 5.8 Application . 4 5.9 Mechanical properties 4 6 Dimen
5、sional and shape tolerances . 5 7 Tensile test sampling . 5 8 Tensile test 5 9 Retests . 5 9.1 Machining and flaws. 5 9.2 Elongation . 6 9.3 Additional tests . 6 10 Resubmission . 6 11 Workmanship 6 12 Inspection and acceptance . 6 13 Coil size . 7 14 Marking 7 15 Information to be supplied by the p
6、urchaser. 7 Bibliography 9 ISO 3573:2012(E) 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 membe
7、r 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 International Elec
8、trotechnical Commission (IEC) on all matters of electrotechnical standardization. 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 adopt
9、ed by the technical committees are circulated to the member bodies for 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 paten
10、t rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 3573 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill flat rolled products. This fif th edition cancels and replaces the fourth edition ( ISO 3573:2008), which has
11、been technically revisediv ISO 2012 All rights reserved INTERNATIONAL ST ANDARD ISO 3573:2012(E) Hot-rolled carbon steel sheet of commercial and drawing qualities 1 Scope This International Standard applies to hot-rolled carbon steel sheet of commercial and drawing qualities. Hot-rolled steel sheet
12、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. NOTE This International Standard does not cover stee
13、l sheet that is to be subjected to subsequent rerolling. 2 Normative references The 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 references, the lates
14、t edition of the reference document (including any amendments) applies. ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature ISO 16160, Hot-rolled steel sheet products Dimensional and shape tolerances 3 T erms an d definiti ons For the purposes of this document,
15、the following terms and definitions apply. 3.1 hot-rolled steel sheet product obtained by rolling heated steel through a continuous hot strip mill or another hot-rolling process that produces a coiled product to the required sheet thickness and tolerances 3.2 hot-rolled descaled steel sheet hot-roll
16、ed steel sheet from which oxide or scale has been removed, commonly by pickling in an acid solution or by mechanical means such as grit blasting Note 1 to entry: Some change in properties can result from descaling. Note 2 to entry: Descaling can also be performed by appropriate mechanical means. 3.3
17、 skin pass light cold-rolling of hot-rolled steel sheet or hot-rolled descaled steel Note 1 to entry: The purpose of the skin pass is to produce a higher degree of surface smoothness and thereby improve the surface appearance. The skin pass also temporarily minimizes the occurrence of a surface cond
18、ition known as stretcher strain (Luders Lines) or fluting during the fabrication of finished parts. The skin pass also controls and improves flatness. Some increase in hardness and loss of ductility will result from skin passing. 3.4 mill edge normal side edge without any definite contour produced i
19、n hot rolling, possibly containing some irregularities such as cracked or torn edges or thin (feathered) edges ISO 2012 All rights reserved 1 ISO 3573:2012(E) 3.5 sheared edge normal edge obtained by shearing, slitting or trimming a mill edge product Note 1 to entry: Normal processing does not neces
20、sarily provide a definite positioning of the slitting. 3.6 aluminum killed steel which has been deoxidized with aluminum sufficiently to prevent the evolution of gas during solidification 4 Dimensions 4.1 Hot-rolled carbon steel sheet is commonly produced in the range of thickness 0,8 mm to 12,5 mm
21、inclusive, and in widths of 600 mm and over, in coils and cut lengths. 4.2 Hot-reduced sheet less than 600 mm wide can be slit from wide sheet and will be considered as sheet. 5 Conditions of manufacture 5.1 Chemical composition The chemical composition (heat analysis) shall not exceed the values gi
22、ven in Tables 1 and 2. On request, a report of the heat analysis shall be made to the purchaser. Each of the elements listed in Table 2 shall be included in the report of the heat analysis. When the amount of copper, nickel, chromium or molybdenum present is less that 0,02 %, the analysis result may
23、 be reported as “ 0,02 %”. A verification analysis may be made by the purchaser to verify the specified analysis of the product and shall take into consideration any normal heterogeneity. Non-killed steels (such as rimmed or capped steels) are not technologically suited to product analysis. For kill
24、ed steels, the sampling method and deviation limits shall be agreed upon between the interested parties at the time of ordering. The product analysis tolerances are shown in Table 3. The processes used in making the steel and in manufacturing zinc-coated sheet are left to the discretion of the manuf
25、acturer. When requested, the purchaser shall be informed of the steel-making process used. Table 1 Chemical composition (heat analysis) Mass fractions in percent Quality C max. Mn max. P max. S max. Designation Name HR1 Commercial 0,12 0,60 0,045 0,035 HR2 Drawing 0,10 0,45 0,035 0,035 HR3 Deep draw
26、ing 0,08 0,40 0,030 0,030 HR4 Deep drawing aluminum killed 0,08 0,35 0,025 0,0302 ISO 2012 All rights reserved ISO 3573:2012(E) Table 2 Limits on additional chemical elements Mass fractions in percent Elements Heat analysis max. Product analysis max. Cu a 0,20 0,23 Ni a 0,20 0,23 Cr a, b 0,15 0,19 M
27、o a, b 0,06 0,07 Nb c 0,008 0,018 V c 0,008 0,018 Ti c 0,008 0,018 aThe sum of copper, nickel, chromium and molybdenum shall not exceed 0,50 % on heat analysis. When one or more of these elements are specified, the sum does not apply; in which case, only the individual limits on the remaining elemen
28、ts will apply. bThe sum of chromium and molybdenum shall not exceed 0,16 % on heat analysis. When one or more of these elements are specified, the sum does not apply; in which case, only the individual limits on the remaining elements will apply. cAn analysis greater than 0,008 may be supplied after
29、 agreement between the producer and the consumer. Table 3 Product analysis tolerances Mass fractions in percent Element M a x i mu m of s p e c i f ie d e l e me n t T o le r a n c e ove r ma x im um s p e c i f ie d Carbon 0,15 0,03 Manganese 0,60 0,03 Phosphorus 0,045 0,01 Sulfur 0,035 0,01NOTE Th
30、e maximum tolerance in this table is the allowable excess over the specified requirement and not the heat analysis. 5.2 Descaling Some increase in hardness and some loss of ductility may result from descaling if mechanical means such as grit blasting are used. The purchaser should state whether desc
31、aling is required. 5.3 Edges Material is normally supplied as described in either 3.4 or 3.5. The purchaser should state what edge condition is required. Other edges may be supplied as agreed. 5.4 Skin passing The purchaser should state whether skin passing is required. 5.5 Oiling As a deterrent to
32、rusting, a coating of rust-preventative oil is usually applied to hot-rolled descaled steel sheet but sheet may be furnished not oiled if required. This oil is not intended as a drawing or forming lubricant and should be easily removable with degreasing chemicals. On request, the manufacturer shall
33、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. ISO 2012 All rights reserved 3 ISO 3573:2012(E) 5.6 Weldability This product is normally suitable fo
34、r 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. 5.7 Fabrication qualities Commercial quality sheet (HR1) is intended for general fabricating purposes where sheet is used in the flat co
35、ndition or for bending, moderate forming and welding operations. Hot rolled carbon steel sheet is available in several fabrication qualities. Drawing quality sheet (HR2, HR3, HR4) is intended for drawing or severe forming, including welding. Drawing quality sheet is furnished according to all the re
36、quirements of this International Standard, or, by agreement when ordered, to fabricate an identified part, in which case the mechanical property requirements do not apply. Drawing qualities are identified as follows: HR2 Drawing quality HR3 Deep drawing quality HR4 Deep drawing quality aluminium kil
37、led 5.8 Application 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, and HR4) may be produced to make an identified part within a properly established breakage allowance, which sha
38、ll be previously agreed between the manufacturer and the purchaser. In this case, the part name, the details of fabrication, and special requirements shall be specified, and the mechanical properties in Table 4 do not apply. 5.9 Mechanical properties Except when ordered according to an identified pa
39、rt as explained in 5.7, the mechanical properties shall be as given in Table 4 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 the mechanical properties (increase in hardness and a decrease in elon
40、gation), leading to a decrease in drawability. To minimize this effect, quality HR4 should be specified.4 ISO 2012 All rights reserved ISO 3573:2012(E) Table 4 Mechanical property requirements for hot-rolled carbon steel sheet Quality R mamax. MPa A b, cmin. % e 3 3 e 6 Designation d Name L o= 80 mm
41、 L o= 50 mm L o= 5,65S o L o= 50 mm HR1 Commercial 440 23 24 28 29 HR2 Drawing 420 25 26 30 31 HR3 Deep drawing 400 28 29 33 34 HR4 Deep drawing alu- minum killed 380 31 32 36 37 R mtensile strength A percentage elongation after fracture L ogauge length of original test piece S ooriginal cross secti
42、onal area of gauge length e thickness of steel sheet, in mm 1 MPa = 1 N/mm 2 aThe minimum tensile strength for qualities HR1, HR2, HR3 and HR4 would normally be expected to be 270 MPa. Where the minimum tensile strength is required, the value of 270 MPa may be specified. All tensile strength values
43、are determined to the nearest 10 MPa. bA 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
44、3 mm and over in thickness. cFor materials over 6 mm in thickness, values for elongation are subject to agreement between the manufacturer and the purchaser. dRefer to 5.8 (Application). 6 Dimensional and shape tolerances Dimensional and shape tolerances applicable to hot-rolled steel sheet shall be
45、 as given in ISO 16160. 7 Tensile test sampling One representative sample for the tensile test required in Table 4 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 Tensile test The tensil
46、e test shall be carried out in accordance with ISO 6892-1. Transverse test pieces shall be taken midway between the centre and edge of the sheet as rolled. 9 Retests 9.1 Machining and fla w s If any test piece shows defective machining or develops flaws, it shall be discarded and another test piece
47、substituted. ISO 2012 All rights reserved 5 ISO 3573:2012(E) 9.2 Elongation If the percentage 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, the test shall be discarded an
48、d a retest shall be carried out. 9.3 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 of this International Standard; otherwise, the lot may be rejected. 10 Resubmission
49、 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 (for example: selection, heat treatment) that, on request, will be indicated to the purchaser. In this case, 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. 11 Workmanship The su
