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1、BRITISH STANDARD BS EN 10303:2001 Thin magnetic steel sheet and strip for use at medium frequencies The European Standard EN 10303:2001 has the status of a British Standard ICS 29.030 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 10303:2001 This British Standard, havin
2、g been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 June 2001 BSI 06-2001 ISBN 0 580 36997 8 National foreword This British Standard is the official English language version of EN 10303:2001
3、. It supersedes BS 6404-8.8:1992 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/NFE/5, Magnetic alloys and steels, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.
4、 Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Elec
5、tronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to unders
6、tand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover
7、, an inside front cover, the EN title page, pages 2 to 13 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10303 March 2001 I
8、CS 77.140.40; 77.140.50 English version Thin magnetic steel sheet and strip for use at medium frequencies Tles et bandes magntiques extra-minces en acier pour utilisation moyennes frquences Dnnes Elektroblech und -band aus Stahl zur Verwendung bei mittleren Frequenzen This European Standard was appr
9、oved by CEN on 4 February 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationa
10、l standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notifie
11、d to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Un
12、ited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10303:200
13、1 E Page 2 EN 10303:2001 Contents Foreword3 1Scope 4 2Normative references 4 3Terms and definitions4 4Classification5 5Designation.5 6General requirements5 6.1Production process .5 6.2Form of supply.5 6.3Delivery condition5 6.4Surface condition.6 6.5Suitability for cutting.6 7Technical requirements.
14、6 7.1Magnetic properties.6 7.2Geometric characteristics and tolerances7 7.3Technological characteristics 9 8Inspection.10 8.1General10 8.2Selection of samples .10 8.3Preparation of test specimens10 8.4Test methods12 9Marking, labelling and packaging 13 10Complaints13 11Ordering information.13 Page 3
15、 EN 10303:2001 Foreword This European Standard has been prepared by Technical Committee ECISS/TC 24 “Electrical steel sheet and strip qualities - Qualities, dimensions, tolerances and specific tests“, the secretariat of which is held by DIN. This European Standard shall be given the status of a nati
16、onal standard, either by publication of an identical text or by endorsement, at the latest by September 2001, and conflicting national standards shall be withdrawn at the latest by September 2001. This document is based on IEC 60404-8-8. According to the CEN/CENELEC Internal Regulations, the nationa
17、l standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page
18、 4 EN 10303:2001 1 Scope This European Standard defines the grades of thin non-oriented magnetic steel sheet and strip in nominal thicknesses of 0,05 mm, 0,10 mm, 0,15 mm and 0,20 mm, and of thin grain-oriented magnetic steel sheet and strip in nominal thicknesses of 0,05 mm, 0,10 mm and 0,15 mm. In
19、 particular, it gives general requirements, magnetic properties, geometric characteristics and tolerances and technological characteristics, as well as inspection procedure. This European Standard applies to magnetic steel sheet and strip supplied in the finally annealed condition in coils and inten
20、ded for the construction of magnetic circuits used at frequencies equal to or higher than 100 Hz. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text a
21、nd the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (
22、including amendments). EN 10021, Steel and steel products - General technical delivery requirements. EN 10204, Metallic products - Types of inspection document. EN 10251, Methods of determination of the geometrical characteristics of magnetic steel sheet and strip. EN 10252, Methods of measurement o
23、f magnetic properties of magnetic steel sheet and strip at medium frequencies. EN ISO 7799, Metallic materials - Sheet and strip 3 mm thick of less - Reverse bend test (ISO 7799:1985). IEC 60050 (121), International Electrotechnical Vocabulary (IEV) Chapitre 121 : Electromagnetism. IEC 60050 (221),
24、International Electrotechnical Vocabulary (IEV) - Chapter 221 : Magnetic materials and components. IEC 60404-13, Magnetic materials - Part 13: Methods of measurement of density, resistivity and stacking factor of electrical steel sheet and ship. 3 Terms and definitions For the purposes of this Europ
25、ean standard, the terms and definitions given in IEC 60050(121) and IEC 60050 (221) and the following apply. 3.1 number of bends number of alternate bends possible before the appearance of the first crack in the base metal visible to the naked eye NOTEIt constitutes an indication of the ductility of
26、 the material. 3.2 edge camber greatest distance between a longitudinal edge of the strip or sheet and the line joining the two extremities of the measured length of this edge Page 5 EN 10303:2001 4 Classification The grades covered by this European Standard are classified according to the maximum v
27、alue of the specific total loss, in watts per kilogram, and according to the nominal thickness of the material (0,05 mm, 0,10 mm, 0,15 mm and 0,20 mm for non-oriented steel ; 0,05 mm, 0,10 mm and 0,15 mm for grain-oriented steel). 5 Designation The conventional designation of the different grades co
28、mprises the following in the order : a) the characteristic letters : ? NO for non-oriented strip and sheet; ? GO for grain-oriented strip and sheet; b) 100 times the nominal thickness of the material, in millimetres. EXAMPLENO 20 : non-oriented strip in thickness of 0,20 mm. 6 General requirements 6
29、.1 Production process The production process of the steel and its composition are left to the discretion of the manufacturer. 6.2 Form of supply The material is supplied in coils. The mass of coils shall be agreed at the time of ordering. The recommended value for the internal diameter of coils is a
30、pproximately 400 mm except for non-oriented strip in thickness of 0,20 mm for which the recommended internal diameter is approximately 500 mm. The strip shall be of constant width and wound in such a manner that the edges are super-imposed in a regular manner and that the side faces of the coil are
31、substantially flat. The coils shall be sufficiently tightly wound that they do not collapse under their own weight. The strip can occasionally exhibit welds or interleaves resulting from the removal of defective zones, subject to prior agreement between the parties. The value of the additional thick
32、ness due to the weld is subject to the agreement. If necessary the marking of welds or interleaves may form the subject of a special agreement. For coils containing repair welds or interleaves, each part of the strip shall be of the same grade material. The edges of parts welded together shall not b
33、e so much out of alignment as to affect the further processing of the material. 6.3 Delivery condition Except for non-oriented strip of 0,20 mm thickness, the material is usually delivered with an insulating inorganic coating on both sides. Non-oriented strip of 0,20 mm thickness is delivered either
34、 with a coating on one or both sides or without a coating. Different types of coating can be provided. Page 6 EN 10303:2001 6.4 Surface condition The surfaces shall be smooth and clean and free from grease and rust. 1) Any insulation coating on the surface of the material shall be sufficiently adher
35、ent so as not to become detached during heat treatment under conditions specified by the supplier or during cutting operations. NOTE If the product is to be immersed in a fluid or is to be given an additional coating or impregnation, an agreement initiated by the purchaser should be reached with the
36、 supplier to ensure compatibility with the surface insulation coating. 6.5 Suitability for cutting The material shall be capable of being cut at any point and into the usual shapes thus ensuring accurate working with the correct cutting tools. 7 Technical requirements 7.1 Magnetic properties 7.1.1Ma
37、gnetic polarization This characteristic applies only to grain-oriented material. The minimum specified values of magnetic polarization for a magnetic field strength of 800 A/m (peak value) and at the frequency specified in table 1 for grain-oriented material shall be as given in table 1. 7.1.2Specif
38、ic total loss The specified maximum values of specific total loss shall be as given in tables 1 and 2. They apply to test specimens that have received, after cutting, a stress relief heat treatment under conditions specified by the manufacturer, except for the non-oriented steel of 0,20 mm thickness
39、. Depending on the thicknesses, the values are specified at 1,0 T for the non-oriented steel and at 1,0 T or 1,5 T for the grain-oriented material and at the frequency specified in tables 1 and 2. 1) This should not be confused with some coloration of the insulating coating inherent in the manufactu
40、ring process. Page 7 EN 10303:2001 Table 1 Magnetic and technological characteristics of grain-oriented strip DesignationNominal thickness Maximum specific total lossMinimum magnetic polarization for Minimum stacking minimum number of mmW/kg atH = 800 A/m afactorbends 1,0 T1,5 TFrequencyTFrequency H
41、zHz GO 50,0524-1 0001,601 0000,883 GO 100,10-154001,704000,913 GO 150,15-164001,704000,923 a It has been common practice for many years to give values of magnetic flux density in tables such as the one above. In fact the Epstein frame is used to determine magnetic polarization (intrinsic flux densit
42、y) which is defined as : J = B - ?0H where Jis the magnetic polarization ; Bis the magnetic flux density ; His the magnetic field strength ; ?0is the magnetic constant ; in accordance with IEC 60050 (121). For the magnetic field strength of 800 A/m, the difference is negligible. Table 2 Magnetic and
43、 technological characteristics of non-oriented strips DesignationNominal thickness Maximum specific total lossMinimum stacking factor Minimum number of bends mmW/kg at 1,0 TFrequency Hz NO 50,05451 0000,882 NO 100,10134000,912 NO 150,15144000,922 NO 200,2015 a4000,93 a2 a Value determined on test sp
44、ecimens without coating. 7.2 Geometric characteristics and tolerances 7.2.1Thickness The nominal thicknesses of the material are : ? 0,05 mm, 0,10 mm 0,15 mm and 0,20 mm for non-oriented steel ; ? 0,05 mm, 0,10 mm and 0,15 mm for grain-oriented steel. Page 8 EN 10303:2001 For thickness tolerance, a
45、distinction is made between : ? the allowable tolerance on nominal thickness within the same acceptance unit ; ? the difference in thickness in a length of strip of 1,5 m in a direction parallel to the direction of rolling ; ? the difference in thickness in a length of strip of 1,5 m in a direction
46、perpendicular to the direction of rolling. This tolerance applies only to material with a width greater than 150 mm the measurement being made at least 40 mm from the edges. At any point, the allowable tolerance on the nominal thickness shall not exceed the values given in the Table 3. The differenc
47、e in thickness in a direction parallel to the direction of rolling shall not exceed 0,020 mm. The difference in thickness in a direction perpendicular to the direction of rolling shall not exceed the values given in the Table 3. Table 3 Thickness tolerances Dimensions in millimetres Nominal thicknes
48、sPermitted variation in nominal thickness Difference in thickness in a direction perpendicular to the direction of rolling Non-orientedGrain-orientedNon-orientedGrain-oriented stripstripstripstrip 0,05+ 0,010+ 0,0100,0080,008 - 0,005- 0,005 0,10? 0,010? 0,0100,0100,010 0,15? 0,015? 0,0150,0200,020 0
49、,20? 0,020-0,020- 7.2.2Width 7.2.2.1Non oriented strip The current nominal widths are less than or equal to 1 250 mm. The tolerance given in Table 4 shall apply. Table 4 Width tolerance of non oriented sheet and strip Dimensions in millimetres Nominal widthPermitted deviations l l ? 150+ 0,4 0 150 500+ 1,5 0 NOTEBy agreement when ordering, the tolerances on the width can be all minus values. Page 9 EN 10303:2001 7.2.2.2Grain-oriented strip The current nominal widths are less than or equal to 400 mm. The tolerances given in Table 5 shall apply : Table 5 Width tol