1、 ISO 2012 Cold-reduced carbon steel sheet for vitreous enamelling Tles en acier au carbone lamines froid pour maillage par vitrification INTERNATIONAL STANDARD ISO 5001 Fifth edition 2012-08-01 Reference number ISO 5001:2012(E) ISO 5001:2012(E) ii ISO 2012 All rights reserved COPYRIGHT PROTECTED DOC
2、UMENT 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 below or ISOs member bod
3、y 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 5001:2012(E) ISO 2012 All rights reserved iii Contents Page Foreword iv 1 Scope 1 2 Normative re
4、ferences . 1 3 T erms and definitions . 1 4 Quality designations for steel sheets for vitreous enamelling . 2 5 Conditions of manufacture . 2 5.1 Steelmaking 2 5.2 Chemical composition . 2 5.3 Chemical analysis . 3 5.4 Weldability . 4 5.5 Application 4 5.6 Mechanical properties 4 5.7 Strain ageing .
5、 5 5.8 Surface condition 6 5.9 Surface finish . 6 5.10 Surface quality . 6 5.11 Oiling . 6 6 Dimensional and shape tolerances 6 7 Tensile test sampling 6 8 Tensile test requirements 6 9 Retests . 7 10 Resubmission . 7 11 Workmanship 7 12 Inspection and acceptance . 7 13 Coil size 7 14 Marking . 7 15
6、 Information to be supplied by the purchaser 8 Bibliography . 9 ISO 5001:2012(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
7、 ISO technical committees. 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 collaborate
8、s closely with the International Electrotechnical 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
9、. Draft International Standards adopted 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
10、 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 5001 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 12, Continuous mill flat rolled products. This fifth edition cancels and replaces the fourth
11、edition (ISO 5001:2007), which has been technically revised. iv ISO 2012 All rights reserved INTERNATIONAL STANDARD ISO 5001:2012(E) Cold-reduced carbon steel sheet for vitreous enamelling 1 Scope This International Standard applies to cold-reduced carbon steel sheet of commercial and drawing qualit
12、ies for vitreous enamelling, where the surface of the sheet and chemical composition of the base metal are of prime importance. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For
13、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 temperature ISO 16162, Cold-rolled steel sheet products Dimensional and shape tolerances 3 T erms and definitio ns For t
14、he purposes of this document, the following terms and definitions apply. 3.1 steel sheet for vitreous enamelling product obtained from cold-reduced steel sheet having a matte finish and for which proper chemical composition and processing are selected by the producer to prepare the sheet for both fa
15、brication and vitreous enamelling. NOTE It is produced in thicknesses of 0,35 mm and thicker (commonly up to 3 mm) and in widths of 600 mm and wider in coils and cut lengths. Sheet for vitreous enamelling less than 600 mm wide may be slit from wide sheet and will be considered sheet. 3.2 skin pass f
16、inal light cold rolling of cold-reduced fully processed sheet NOTE The purpose of the final light cold rolling is one or more of the following: a) to temporarily minimize the occurrence of stretcher strains (Lders lines) or fluting during fabrication of finished parts; b) to obtain the required surf
17、ace finish for vitreous enamelling; c) to control shape. 3.3 stabilized interstitial steel extra-low-carbon steel in which all interstitial elements are combined with titanium and/or equivalent elements 3.4 Types for vitreous enamelling 3.4.1 type 1 sheet steel suitable for two-coat enamelling NOTE
18、The base metal of this type loses strength after firing the enamel, and if this is a problem, the producer should be consulted. ISO 2012 All rights reserved 1 ISO 5001:2012(E) 3.4.2 type 2 very-low-carbon sheet steel suitable for direct cover coat (one coat) enamelling and also for two-coat enamelli
19、ng for special applications (sag resistance) NOTE It should be noted that this type loses strength after firing and, if this should be a problem, the producer should be consulted. See Table 1 footnote “a” for other special application details. 3.4.3 type 3 interstitial-free sheet steel with extremel
20、y low carbon content and excellent formability, suitable for one- or two- coat enamelling 3.5 lot a lot consisting of 50 tonnes or less of the same quality rolled to the same thickness and condition 4 Quality designations for steel sheets for vitreous enamelling 4.1 Commercial-quality sheet (VE01) i
21、s intended for general fabricating purposes where sheet is used in the flat form, or for bending or moderate forming. 4.2 Drawing-quality sheet (VE02, VE03, VE04 and VE05) is intended for drawing and severe forming. It is furnished according to all requirements of this International Standard or, by
22、agreement when ordered, to fabricate an identified part, in which case the mechanical properties of Table 4 do not apply. If strain ageing is to be minimized, grade VE04 or VE05 should be specified. Drawing qualities are identified as follows: VE02 drawing quality; VE03 deep-drawing quality; VE04 de
23、ep-drawing quality aluminium-killed; VE05 extra-deep-drawing quality (stabilized interstitial-free). 4.3 The designations in 4.1 and 4.2 include the qualities of sheet steel for vitreous enamelling. The designation VE represents “vitreous enamelling” similar to CR “cold reduced”. The numbers 01, 02,
24、 03, 04 and 05 are common to other standards, indicating the qualities of commercial, drawing, deep-drawing, deep-drawing aluminium-killed and extra-deep-drawing interstitial-free. 5 Conditions of manufacture 5.1 Steelmaking The processes used in making the steel and in manufacturing sheet for vitre
25、ous enamelling are left to the discretion of the producer. When requested, 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 Tables 1 and 2. 2 ISO 2012 All rights reserved ISO
26、5001:2012(E) Table 1 Chemical composition Element Composition, max. % (mass fraction) Vitreous enamelling types and quality designations Type 1 Type 2 a Type 3 Aluminium-killed Stabilized interstitial-free Carbon 0,05 0,02 0,008 Manganese 0,50 0,50 0,40 Phosphorus 0,040 0,040 0,040 Sulfur 0,040 0,03
27、0 0,030 Nb, Ti, Va b 0,15 c aFor some one-coat applications, the carbon content must be reduced to less than 0, 01 % by means of appropriate annealing practices to obtain satisfactory enamelling performance. In such cases, since the decarburization process occurs after the melting process, heat anal
28、ysis is not appropriate and product analysis can be used to check the carbon content. When supplied from interstitial- free steel, quality applications VE03 and VE04 can also qualify for enamelling application requiring reduced carbon levels. bMicroalloys are permitted to meet special customer requi
29、rements. cNiobium, titanium and vanadium, or in various combinations, are made to combine with the carbon and nitrogen to produce interstitial-free steel. Table 2 Limits on additional chemical elements, % (mass fraction) Element Cu amax. Ni amax. Cr abmax. Mo abmax. Nb cmax. V cdmax. Ti dmax. Heat a
30、nalysis 0,20 0,20 0,15 0,06 0,008 0,008 0,008 Product analysis 0,23 0,23 0,19 0,07 0,018 0,018 0,018 Each 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 res
31、ult may be reported as 0,02 %. aThe sum of copper, nickel, chromium and molybdenum shall not exceed 0,50 % on the 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 apply. bThe sum of chromium a
32、nd 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 apply. cFor interstitial-free steels only, the value of 0,15 % titanium, and 0,10 % maximum for niobiu
33、m and vanadium, are acceptable to ensure that the carbon and nitrogen are fully stabilized. dHeat analysis greater than 0,008 % (mass fraction) may be supplied after agreement between the producer and purchaser. 5.3 Chemical analysis 5.3.1 Heat analysis An analysis of each heat of steel shall be mad
34、e by the manufacturer to determine compliance with the requirements given in Tables 1 and 2. When requested, this analysis shall be reported to the purchaser or his representative. 5.3.2 Product analysis A product analysis may be made by the purchaser to verify the specified analysis of the semi-fin
35、ished or finished steel and shall take into consideration any normal heterogeneity. Non-killed steels (such as rimmed or capped) are not technologically suitable for verification analysis. For killed steels, the sampling method shall be agreed between the manufacturer and the purchaser at the time o
36、f ordering. The product analysis tolerances shall be in accordance with Table 3. ISO 2012 All rights reserved 3 ISO 5001:2012(E) Table 3 Product analysis tolerances, % (mass fraction) Element M a ximum of specified element T olerance ove r ma ximum specified C 0,008 0,02 0,05 0,001 0,005 0,01 Mn 0,5
37、0 0,03 P 0,04 0,01 S 0,02 0,01 Ti or Nb or Va 0,15 0,01 NOTE The above maximum tolerance is the allowable excess over the specified requirement and not the heat analysis. 5.4 Weldability The product is easily welded. Certain precautions may be advisable due to the very low hardness of VE02, VE03, VE
38、04 and VE05 material. 5.5 Application Steel sheet for vitreous enamelling shall be identified for fabrication by the name of the part or by the intended application. Steel sheet of drawing quality (VE02, VE03, VE04 or VE05) may be produced to make an identified part previously agreed upon between th
39、e manufacturer and purchaser. In this case, the part name, the details of fabrication, the vitreous enamelling practice and any special requirements (freedom from stretcher strain or fluting) shall be specified, and the mechanical properties of Table 4 do not apply. 5.6 Mechanical properties Except
40、when ordered as an identified part as explained in 5.5, the mechanical properties of the steel, at the time the steel is made available for shipment, shall be as stated in Table 4. The properties shall be determined on test pieces obtained in accordance with the requirements of Clause 7. Prolonged s
41、torage of the sheet can cause a change in mechanical properties (increase in hardness and decrease in elongation, leading to a decrease in drawability). To minimize this effect, quality VE04 or VE05 should be specified. 4 ISO 2012 All rights reserved ISO 5001:2012(E) Table 4 Mechanical property requ
42、irements a Base metal quality R m b max. MPa A c min. % r d min. n e min. Designation Name L 0= 80 mm L 0= 50 mm VE01 Commercial f 410 27 28 VE02 Drawing 370 30 31 VE03 Deep-drawing 350 34 35 VE04 Deep-drawing 350 36 37 VE05 Extra-deep-drawing 350 38 38 1,6 0,20 NOTE 1 MPa = 1 N/mm 2 . aR mtensile s
43、trengthA percent elongation after fractureL 0 gauge length on test piecer plastic strain ratio (indicator of the drawability of the product)n tensile strain hardening exponent (indicator of the stretchability of the product) bFor qualities VE02, VE03 and VE04, the minimum tensile strength would norm
44、ally be expected to be 270 MPa. All tensile strength values are determined to the nearest 10 MPa. For design purposes, the lower limit of R emay be assumed to be 140 MPa for VE01, VE02, VE03 and VE04 and 120 MPa for VE05. cFor material up to and including 0,6 mm in thickness, the elongation values i
45、n this table shall be reduced by 1. dr can also be written as r bar. en can also be written as n bar. fMechanical properties are not generally determined for commercial-quality products and the values in this table are for information only. 5.7 Strain ageing Steel sheet for vitreous enamelling in qu
46、alities VE01, VE02 and VE03 supplied in the skin-passed condition tends to strain age and this may lead to the following: a) surface markings from stretcher strain (Lders lines) or fluting when the steel is formed; b) deterioration in ductility. Steel sheet for vitreous enamelling in quality VE04 su
47、pplied in the skin-passed condition may be subject to strain ageing under certain conditions. Strain ageing can be caused by either carbon or nitrogen atoms which exist in a supersaturated solid solution and diffuse to dislocation sites, this diffusion depending on time and temperature. The addition
48、 of aluminium in sufficient quantities causes the removal of nitrogen from solid solution as particles of aluminium nitride. This practice tends to minimize room-temperature ageing due to nitrogen and results in the general understanding that cold-rolled aluminium-killed steel is free of ageing conc
49、erns generally associated with VE04. However, carbon, which is usually not retained in solid solution with the slow cooling typical of batch annealing, can be retained in solid solution during the continuous-annealing process. If the annealing process and steel chemistry are not properly controlled, such material with carbon remaining in solid solution after continuous annealing may result and such material will strain age at room temperature and the problems noted above can occur. Chemical stabilization, as with
