SIST EN 10303:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Dünnes Elektroblech und -band aus Stahl zur Verwendung bei mittleren FrequenzenTôles et bandes magnétiques extra-minces en acier pour utilisation a moyennes fréquencesThin magnetic steel sheet and strip for use at medium frequencies77.140.50SROL]GHONLFlat steel products and semi-products77.140.40Jekla s posebnimi magnetnimi lastnostmiSteels with special magnetic propertiesICS:Ta slovenski standard je istoveten z:EN 10303:2001SIST EN 10303:2002en01-september-2002SIST EN 10303:2002SLOVENSKI
STANDARD



SIST EN 10303:2002



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10303March 2001ICS 77.140.40; 77.140.50English versionThin magnetic steel sheet and strip for use at mediumfrequenciesTôles et bandes magnétiques extra-minces en acier pourutilisation à moyennes fréquencesDünnes Elektroblech und -band aus Stahl zur Verwendungbei mittleren FrequenzenThis European Standard was approved 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 EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.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 United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10303:2001 ESIST EN 10303:2002



Page 2EN 10303:2001ContentsForeword.31Scope.42Normative references.43Terms and definitions.44Classification.55Designation.56General requirements.56.1Production process.56.2Form of supply.56.3Delivery condition.56.4Surface condition.66.5Suitability for cutting.67Technical requirements.67.1Magnetic properties.67.2Geometric characteristics and tolerances.77.3Technological characteristics.98Inspection.108.1General.108.2Selection of samples.108.3Preparation of test specimens.108.4Test methods.129Marking, labelling and packaging.1310Complaints.1311Ordering information.13SIST EN 10303:2002



Page 3EN 10303:2001ForewordThis European Standard has been prepared by Technical Committee ECISS/TC 24 "Electrical steel sheet and stripqualities - Qualities, dimensions, tolerances and specific tests", the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by September 2001, and conflicting national standards shall be withdrawn at thelatest by September 2001.This document is based on IEC 60404-8-8.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries 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.SIST EN 10303:2002



Page 4EN 10303:20011 ScopeThis European Standard defines the grades of thin non-oriented magnetic steel sheet and strip in nominalthicknesses of 0,05 mm, 0,10 mm, 0,15 mm and 0,20 mm, and of thin grain-oriented magnetic steel sheet and stripin nominal thicknesses of 0,05 mm, 0,10 mm and 0,15 mm. In particular, it gives general requirements, magneticproperties, geometric characteristics and tolerances and technological characteristics, as well as inspectionprocedure.This European Standard applies to magnetic steel sheet and strip supplied in the finally annealed condition in coilsand intended for the construction of magnetic circuits used at frequencies equal to or higher than 100 Hz.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (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 of magnetic properties of magnetic steel sheet and strip at mediumfrequencies.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), International Electrotechnical Vocabulary (IEV) - Chapter 221 : Magnetic materials andcomponents.IEC 60404-13, Magnetic materials - Part 13: Methods of measurement of density, resistivity and stacking factor ofelectrical steel sheet and ship.3 Terms and definitionsFor the purposes of this European standard, the terms and definitions given in IEC 60050(121) and IEC 60050(221) and the following apply.3.1number of bendsnumber of alternate bends possible before the appearance of the first crack in the base metal visible to the nakedeyeNOTEIt constitutes an indication of the ductility of the material.3.2edge cambergreatest distance between a longitudinal edge of the strip or sheet and the line joining the two extremities of themeasured length of this edgeSIST EN 10303:2002



Page 5EN 10303:20014 ClassificationThe grades covered by this European Standard are classified according to the maximum value of the specific totalloss, in watts per kilogram, and according to the nominal thickness of the material (0,05 mm, 0,10 mm, 0,15 mmand 0,20 mm for non-oriented steel ; 0,05 mm, 0,10 mm and 0,15 mm for grain-oriented steel).5 DesignationThe conventional designation of the different grades comprises 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 requirements6.1 Production processThe production process of the steel and its composition are left to the discretion of the manufacturer.6.2 Form of supplyThe 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 approximately 400 mm except for non-oriented strip inthickness 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 regularmanner and that the side faces of the coil are 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 toprior agreement between the parties. The value of the additional thickness due to the weld is subject to theagreement. 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 be so much out of alignment as to affect the further processing of thematerial.6.3 Delivery conditionExcept for non-oriented strip of 0,20 mm thickness, the material is usually delivered with an insulating inorganiccoating on both sides.Non-oriented strip of 0,20 mm thickness is delivered either with a coating on one or both sides or without a coating.Different types of coating can be provided.SIST EN 10303:2002



Page 6EN 10303:20016.4 Surface conditionThe 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 adherent so as not to become detachedduring 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 agreementinitiated by the purchaser should be reached with the supplier to ensure compatibility with the surface insulation coating.6.5 Suitability for cuttingThe material shall be capable of being cut at any point and into the usual shapes thus ensuring accurate workingwith the correct cutting tools.7 Technical requirements7.1 Magnetic properties7.1.1Magnetic polarizationThis 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 atthe frequency specified in table 1 for grain-oriented material shall be as given in table 1.7.1.2Specific total lossThe specified maximum values of specific total loss shall be as given in tables 1 and 2. They apply to testspecimens that have received, after cutting, a stress relief heat treatment under conditions specified by themanufacturer, except for the non-oriented steel of 0,20 mm thickness.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 forthe 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 manufacturing process.SIST EN 1030
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