1、 IEC 60404-8-4 Edition 3.0 2013-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Magnetic materials Part 8-4: Specifications for individual materials Cold-rolled non-oriented electrical steel strip and sheet delivered in the fully-processed state Matriaux magntiques Partie 8-4: Spcifications pour matr
2、iaux particuliers Bandes et tles magntiques en acier grains non orients, lamines froid et livres ltat fini IEC60404-8-4:2013 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2013 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
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16、publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 60404-8-4 Edition 3.0 2013-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Magnetic materials Part 8-4: Specifications for individual materials Cold-rolled non-oriented electrical steel strip and sheet delivered in the fully-pro
17、cessed state Matriaux magntiques Partie 8-4: Spcifications pour matriaux particuliers Bandes et tles magntiques en acier grains non orients, lamines froid et livres ltat fini INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE S ICS 17.220.20; 29.030 PRICE CODE CODE
18、PRIX ISBN 978-2-83220-786-4 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu
19、cette publication via un distributeur agr. 2 60404-8-4 IEC:2013 CONTENTS FOREWORD . 4 1 Scope . 6 2 Normative references 6 3 Terms and definitions . 6 4 Classification 7 5 Designation 7 6 General requirements . 7 6.1 Production process 7 6.2 Form of supply . 7 6.3 Delivery condition 8 6.4 Surface co
20、ndition . 8 6.5 Suitability for cutting 8 7 Technical requirements . 9 7.1 Magnetic properties . 9 7.1.1 General . 9 7.1.2 Magnetic polarization . 9 7.1.3 Specific total loss . 13 7.1.4 Anisotropy of loss 13 7.2 Geometrical characteristics and tolerances 13 7.2.1 Thickness 13 7.2.2 Width . 14 7.2.3
21、Length . 14 7.2.4 Edge camber . 14 7.2.5 Flatness (wave factor) 15 7.2.6 Residual curvature . 15 7.3 Technological characteristics . 15 7.3.1 Density 15 7.3.2 Stacking factor . 15 7.3.3 Number of bends . 15 7.3.4 Internal stresses 15 8 Inspection and testing . 15 8.1 General . 15 8.2 Selection of sa
22、mples 16 8.3 Preparation of test specimens 16 8.3.1 Magnetic properties . 16 8.3.2 Geometrical characteristics and tolerances 16 8.3.3 Technological characteristics . 17 8.4 Test methods 17 8.4.1 General . 17 8.4.2 Magnetic properties . 17 8.4.3 Geometrical characteristics and tolerances 18 8.4.4 Te
23、chnological characteristics . 18 8.5 Retests 18 9 Marking, labelling and packaging 19 10 Complaints . 19 11 Information to be supplied by the purchaser 19 60404-8-4 IEC:2013 3 Annex A (informative) Non-specified magnetic properties . 20 Annex B (informative) European steel numbers 21 Annex C (inform
24、ative) Calculation of density values 22 Bibliography 23 Table 1 Technological properties and magnetic properties measured by the Epstein method (1 of 2) . 10 Table 2 Technological properties and magnetic properties measured by the Epstein method for strip and sheet of nominal thickness 0,47 mm for u
25、se at 60 Hz only 12 Table 3 Tolerances on nominal width 14 Table A.1 Non-specified properties . 20 Table B.1 European steel numbers . 21 4 60404-8-4 IEC:2013 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MAGNETIC MATERIALS Part 8-4: Specifications for individual materials Cold-rolled non-oriented elec
26、trical steel strip and sheet delivered in the fully-processed state FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote internati
27、onal co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter re
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33、ty. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication
34、 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for
35、 costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct ap
36、plication of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60404-8-4 has been prepared by IE
37、C technical committee 68: Magnetic alloys and steels, in collaboration with ISO technical committee 17: Steel. This third edition cancels and replaces the second edition published in 1998. It constitutes a technical revision. This edition includes the following significant technical changes with res
38、pect to the previous edition: Deletion of the dates for all normative references (see Clause 2); Introduction of the new grades M210-35A 5 and M230-50A 5 (see Table 1). 60404-8-4 IEC:2013 5 The text of this standard is based on the following documents: CDV Report on voting 68/436/CDV 68/450/RVC Full
39、 information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 60404 series, published under the general title Magnetic
40、 materials, can be found on the IEC website. 6 60404-8-4 IEC:2013 MAGNETIC MATERIALS Part 8-4: Specifications for individual materials Cold-rolled non-oriented electrical steel strip and sheet delivered in the fully-processed state 1 Scope This part of IEC 60404 defines the grades of cold-rolled non
41、oriented electrical steel strip and sheet in nominal thicknesses of 0,35 mm, 0,50 mm, 0,65 mm and 1,00 mm. In particular, it specifies general requirements, the magnetic properties, geometric characteristics and tolerances, and technological characteristics, as well as the inspection procedure. Thi
42、s standard gives in Table 2 the magnetic properties of cold-rolled non-oriented electrical steel strip and sheet of nominal thickness 0,47 mm for use at 60 Hz only. This standard applies to materials supplied in the fully annealed condition intended for the construction of magnetic circuits. It does
43、 not apply to semi-processed material. These magnetic materials correspond to class C.21 of IEC 60404-1. 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
44、cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050 (all parts), International Electrotechnical Vocabulary (available at ) IEC 60404-2, Magnetic materials Part 2: Methods of measurement of the magnetic properties of elect
45、rical steel sheet and strip by means of an Epstein frame IEC 60404-9, Magnetic materials Part 9: Methods of determination of the geometrical characteristics of magnetic steel sheet and strip IEC 60404-13, Magnetic materials Part 13: Methods of measurement of density, resistivity and stacking factor
46、of electrical steel sheet and strip ISO 404, Steel and steel products General technical delivery requirements ISO 7799, Metallic materials Sheet and strip 3 mm thick or less Reverse bend test ISO 10474, Steel and steel products Inspection documents 3 Terms and definitions For the purposes of this do
47、cument, the terms and definitions relating to magnetic properties given in IEC 60050-121 and IEC 60050-221 and the following apply. 60404-8-4 IEC:2013 7 3.1 edge camber greatest distance between a longitudinal edge of the sheet and the line joining the two extremities of the measured length of this
48、edge 3.2 flatness property of a sheet or a length of strip which is characterized by the wave factor, i.e. by the relation of the height of the wave to its length 3.3 number of bends number of alternate bends possible before the appearance in the base metal of the first crack visible to the naked ey
49、e Note 1 to entry: The number of bends constitutes an indication of the ductility of the material. 3.4 internal stresses deviation from the shearing line due to internal stresses 4 Classification The grades covered by this standard are classified according to the value of maximum specific total loss in watts per kilogram at 1,5 T and according to the nominal thickness of the material (0,35
