Magnetic materials - Part 8-11: Specifications for individual materials - Fe-based amorphous strip delivered in the semi-processed state (IEC 60404-8-11:2018)

This part of IEC 60404 defines the grades of Fe-based amorphous strip delivered in the
semi-processed state, i.e. without final heat treatment, of nominal thickness 0,025 mm. Other
nominal thicknesses in the range from 0,020 mm to 0,030 mm can be specified by agreement
between the manufacturer and the purchaser at the time of enquiry and order. In particular, it
gives general requirements, magnetic properties, geometric characteristics, tolerances and
technological characteristics, as well as inspection procedures.
This document applies to the rapidly-solidified Fe-based amorphous strip supplied in coils
with as-cast edges and intended for the construction of magnetic circuits.
The grades are grouped into two classes:
– conventional grades;
– high permeability grades.
They correspond to Class I1 of IEC 60404-1.

Magnetische Werkstoffe - Teil 8-11: Anforderungen an einzelne Werkstoffe - Eisenbasiertes, amorphes Band in nicht schlussgeglühtem Zustand

Matériaux magnétiques - Partie 8-11: Spécifications pour matériaux particuliers - Bandes en alliage amorphe à base de fer livrées à l'état semi-fini

L'IEC 60404-8-11:2018 définit les critères de qualité des bandes en alliage amorphe à base de fer livrées à l'état semi‑fini, c'est-à-dire sans traitement thermique final, d'une épaisseur nominale de 0,025 mm. D'autres épaisseurs nominales comprises entre 0,020 mm et 0,030 mm peuvent être spécifiées sous réserve d'un accord entre le fabricant et l'acheteur, au moment de la consultation et de la commande. Elle définit notamment les exigences générales, les propriétés magnétiques, les caractéristiques géométriques, les tolérances et les caractéristiques technologiques, ainsi que les procédures de contrôle applicables. Le présent document s'applique aux bandes en alliage amorphe à base de fer produites par solidification rapide, livrées en bobines avec des bords bruts de coulée et destinées à la construction de circuits magnétiques. Les qualités sont groupées en deux classes: - les qualités conventionnelles; - les qualités à haute perméabilité. Ces qualités correspondent à la Classe I1 de l'IEC 60404-1

Magnetni materiali - 8-11. del: Specifikacije za posamezne materiale - Amorfni trak na osnovi železa, dobavljen kot polizdelek (IEC 60404-8-11:2018)

Ta del standarda IEC 60404 opredeljuje razrede amorfnega traku na osnovi železa, dobavljenega kot polizdelek, tj. brez končne toplotne obdelave, z nazivno debelino 0,025 mm. Določijo se lahko druge nazivne debeline v razponu od 0,020 mm do 0,030 mm, če se tako dogovorita proizvajalec in kupec ob oddaji povpraševanja in naročila. Posebej določa splošne zahteve, magnetne lastnosti, geometrijske lastnosti, odstopanja in tehnološke lastnosti ter postopke pregledovanja.
Ta dokument se uporablja za amorfni trak na osnovi železa, izdelan s postopkom hitrega strjevanja, ki je dobavljen v zvitkih z neobdelanimi odlitimi robovi in je namenjen izdelavi magnetnih vezij.
Obstajata dva razreda:
– običajni razred;
– razred z visoko prepustnostjo.
Ti materiali ustrezajo razredu I1 iz standarda IEC 60404-1.

General Information

Status
Published
Public Enquiry End Date
31-Jul-2017
Publication Date
21-Aug-2018
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Jul-2018
Due Date
30-Sep-2018
Completion Date
22-Aug-2018

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Magnetni materiali - 8-11. del: Specifikacije za posamezne materiale - Amorfni trak na osnovi železa, dobavljen kot polizdelek (IEC 60404-8-11:2018)Magnetic materials - Part 8-11: Specifications for individual materials - Fe-based amorphous strip delivered in the semi-processed state (IEC 60404-8-11:2018)29.030Magnetni materialiMagnetic materialsICS:Ta slovenski standard je istoveten z:EN IEC 60404-8-11:2018SIST EN IEC 60404-8-11:2018en01-september-2018SIST EN IEC 60404-8-11:2018SLOVENSKI

STANDARD
SIST EN IEC 60404-8-11:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN IEC 60404-8-11
July 2018 ICS 17.220.20; 29.030
English Version

Magnetic materials - Part 8-11: Specifications for individual materials - Fe-based amorphous strip delivered in the semi-processed state (IEC 60404-8-11:2018)

Matériaux magnétiques - Partie 8-11: Spécifications pour matériaux particuliers - Bandes en alliage amorphe à base de fer livrées à l'état semi-fini (IEC 60404-8-11:2018)

Magnetische Werkstoffe - Teil 8-11: Anforderungen an einzelne Werkstoffe - eisenbasiertes, amorphes Band in nicht schlussgeglühtem Zustand (IEC 60404-8-11:2018) This European Standard was approved by CENELEC on 2018-04-12. CENELEC 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 national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization

Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23,

B-1040 Brussels © 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60404-8-11:2018 E SIST EN IEC 60404-8-11:2018

EN IEC 60404-8-11:2018 2 European foreword The text of document 68/571/CDV, future edition 1 of IEC 60404-8-11, prepared by IEC/TC 68 "Magnetic alloys and steels" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 60404-8-11:2018. The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2019-01-12 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2021-04-12

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60404-8-11:2018 was approved by CENELEC as a European Standard without any modification. SIST EN IEC 60404-8-11:2018

EN IEC 60404-8-11:2018 3 Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1

Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.

NOTE 2

Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu.

Publication Year Title EN/HD Year IEC 60050-121 -
International Electrotechnical Vocabulary (IEV) -
Part 121: Electromagnetism - -
IEC 60050-221 -
International Electrotechnical Vocabulary (IEV) -
Chapter 221: Magnetic materials and components - -
IEC 60404-1 -
Magnetic materials -
Part 1: Classification EN 60404-1 -
IEC 60404-9 -
Magnetic materials -

Part 9: Methods of determination of the geometrical characteristics of electrical steel sheet and strip EN 60404-9 -

IEC 60404-16 -
Magnetic materials -

Part 16: Methods of measurement of the magnetic properties of Fe-based amorphous strip by means of a single sheet tester EN IEC 60404-16 -

ISO 404 -
Steel and steel products - General technical delivery requirements - -
ISO 10474 -
Steel and steel products - Inspection documents - -
SIST EN IEC 60404-8-11:2018
SIST EN IEC 60404-8-11:2018

IEC 60404-8-11 Edition 1.0 2018-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Magnetic materials –

Part 8-11: Specifications for individual materials – Fe-based amorphous strip delivered in the semi-processed state

Matériaux magnétiques –

Partie 8-11: Spécifications pour matériaux particuliers – Bandes en alliage amorphe à base de fer livrées à l'état semi-fini

INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE

ICS 17.220.20; 29.030
ISBN 978-2-8322-5437-0
® Registered trademark of the International Electrotechnical Commission
Marque déposée 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 cette publication via un distributeur agréé. SIST EN IEC 60404-8-11:2018

– 2 – IEC 60404-8-11:2018 © IEC 2018 CONTENTS FOREWORD ........................................................................................................................... 4 INTRODUCTION ..................................................................................................................... 6 1 Scope .............................................................................................................................. 7 2 Normative references ...................................................................................................... 7 3 Terms and definitions ...................................................................................................... 7 4 Classification ................................................................................................................... 8 5 Designation ..................................................................................................................... 8 6 General requirements ...................................................................................................... 8 6.1 Production process ................................................................................................. 8 6.2 Form of supply ........................................................................................................ 9 6.3 Delivery condition ................................................................................................... 9 6.4 Surface condition .................................................................................................... 9 6.5 Suitability for cutting ............................................................................................... 9 7 Technical requirements ................................................................................................. 10 7.1 Magnetic properties .............................................................................................. 10 7.1.1 Reference condition ....................................................................................... 10 7.1.2 Magnetic polarization ..................................................................................... 10 7.1.3 Specific total loss .......................................................................................... 10 7.2 Geometrical characteristics and tolerances ........................................................... 12 7.2.1 Thickness ...................................................................................................... 12 7.2.2 Width ............................................................................................................. 13 7.2.3 Length ........................................................................................................... 13 7.2.4 Edge camber ................................................................................................. 13 7.2.5 Edge wave (wave factor) ............................................................................... 13 7.2.6 Residual curvature ......................................................................................... 13 7.2.7 Burr height ..................................................................................................... 13 7.3 Technological characteristics ................................................................................ 13 7.3.1 Density .......................................................................................................... 13 7.3.2 Stacking factor............................................................................................... 14 7.3.3 Strip tear ductility .......................................................................................... 14 7.3.4 Internal stresses ............................................................................................ 14 7.3.5 Surface insulation resistance ......................................................................... 14 8 Inspection and testing .................................................................................................... 14 8.1 General ................................................................................................................. 14 8.2 Selection of test samples ...................................................................................... 15 8.3 Preparation of test specimens ............................................................................... 15 8.3.1 Magnetic properties ....................................................................................... 15 8.3.2 Geometrical characteristics and tolerances .................................................... 15 8.3.3 Technological characteristics ......................................................................... 16 8.4 Test methods ........................................................................................................ 16 8.4.1 General ......................................................................................................... 16 8.4.2 Magnetic properties ....................................................................................... 16 8.4.3 Geometrical characteristics and tolerances .................................................... 16 8.4.4 Technological characteristics ......................................................................... 17 8.5 Retests ................................................................................................................. 17 9 Marking, labelling and packaging ................................................................................... 17 SIST EN IEC 60404-8-11:2018

IEC 60404-8-11:2018 © IEC 2018 – 3 –

10 Complaints .................................................................................................................... 17 11 Information to be supplied by the purchaser .................................................................. 18 12 Information to be supplied by the manufacturer ............................................................. 18 Annex A (informative)

Non-specified magnetic properties .................................................... 19 Annex B (normative)

Test method of determination of the stacking factor for Fe-based amorphous strips .................................................................................................................. 20 B.1 General ................................................................................................................. 20 B.2 Test specimen ...................................................................................................... 20 B.3 Measurement procedure ....................................................................................... 20 B.4 Reproducibility ...................................................................................................... 22

Figure B.1 – Schematic diagram of a stacking specimen and a linear

measuring device on side view (a) and on top view (b) ........................................................................... 21

Table 1 – Technological properties and magnetic properties of the conventional grades of Fe-based amorphous strip ................................................................................................ 11 Table 2 – Technological properties and magnetic properties of the high permeability grades of Fe-based amorphous strip ..................................................................................... 12 Table 3 – Tolerances on the nominal width

of Fe-based amorphous strip ............................. 13 Table 4 – Ductility code and number of brittle spots

of Fe-based amorphous strip................ 14 Table A.1 – Non-specified magnetic properties of Fe-based amorphous strip ........................ 19

SIST EN IEC 60404-8-11:2018

– 4 – IEC 60404-8-11:2018 © IEC 2018 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________

MAGNETIC MATERIALS –
Part 8-11: Specifications for individual materials –
Fe-based amorphous strip delivered in the semi-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 international 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 referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. 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. 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 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 application 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 60404-8-11 has been prepared by IEC technical committee 68: Magnetic alloys and steels.

The text of this International Standard is based on the following documents: CDV Report on voting 68/571/CDV 68/585A/RVC

Full information on the voting for the approval of this International Standard can be found in the report on voting indicated in the above table. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. SIST EN IEC 60404-8-11:2018

IEC 60404-8-11:2018 © IEC 2018 – 5 –

A list of all parts in the IEC 60404 series, published under the general title Magnetic materials, can be found on the IEC website. The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific document. At this date, the document will be • reconfirmed, • withdrawn, • replaced by a revised edition, or • amended.

SIST EN IEC 60404-8-11:2018

– 6 – IEC 60404-8-11:2018 © IEC 2018 INTRODUCTION Fe-based amorphous strip is regarded as a promising material to reduce energy loss in transformer cores and, consequently, to help mitigate global warming. The Fe-based amorphous strip is produced by a rapidly-solidifying, direct-casting process. The strip is intended primarily for the construction of wound cores of transformers for commercial power frequency (50 Hz and 60 Hz) applications. After appropriate heat treatment, the strip exhibits a significantly lower value of specific total loss in comparison with grain-oriented electrical steel strip for the same applications. It is associated with low hysteresis loss due to low magnetic anisotropy and with low eddy current loss due to high resistivity and reduced thickness.

SIST EN IEC 60404-8-11:2018
IEC 60404-8-11:2018 © IEC 2018 – 7 –
MAGNETIC MATERIALS –
Part 8-11: Specifications for individual materials –
Fe-based amorphous strip delivered in the semi-processed state

1 Scope This part of IEC 60404 defines the grades of Fe-based amorphous strip delivered in the semi-processed state, i.e. without final heat treatment, of nominal thickness 0,025 mm. Other nominal thicknesses in the range from 0,020 mm to 0,030 mm can be specified by agreement between the manufacturer and the purchaser at the time of enquiry and order. In particular, it gives general requirements, magnetic properties, geometric characteristics, tolerances and technological characteristics, as well as inspection procedures. This document applies to the rapidly-solidified Fe-based amorphous strip supplied in coils with as-cast edges and intended for the construction of magnetic circuits. The grades are grouped into two classes: – conventional grades; – high permeability grades. They correspond to Class I1 of IEC 60404-1. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-121, International Electrotechnical Vocabulary – Part 121: Electromagnetism IEC 60050-221, International Electrotechnical Vocabulary – Chapter 221: Magnetic materials and components IEC 60404-1, Magnetic materials – Part 1: Classification IEC 60404-9, Magnetic materials – Part 9: Methods of determination of the geometrical characteristics of magnetic steel sheet and strip IEC 60404-16, Magnetic materials – Part 16: Methods of measurement of the magnetic properties of Fe-based amorphous strip by means of a single sheet tester ISO 404, Steel and steel products – General technical delivery requirements ISO 10474, Steel and steel products – Inspection documents 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60050-121, IEC 60050-221, IEC 60404-9, and the following apply. SIST EN IEC 60404-8-11:2018

– 8 – IEC 60404-8-11:2018 © IEC 2018 ISO and IEC maintain terminological databases for use in standardization at the following addresses: • IEC Electropedia: available at http://www.electropedia.org/ • ISO Online browsing platform: available at http://www.iso.org/obp 3.1

strip tear ductility ductility which is characterized by a ductility code that is classified by the number of brittle spots when a strip of a length corresponding to two times the casting roll circumference is torn in a direction parallel to the casting direction Note 1 to entry: The ductility code is specified in Table 4. 3.2

casting roll spinning chilled roll on which molten alloy is ejected and a rapidly-solidified strip is produced 3.3

brittle spots areas of strip which show the following brittleness when being torn through: shatter, fracture, diverting the path or direction of the tear by approximately 6 mm or more, or a piece of the material comes free from the strip 4 Classification The grades covered by this document are classified according to the value of maximum specific total loss in watts per kilogram at a peak magnetic polarization of 1,3 T and 50 Hz, according to the value of minimum stacking factor and according to the nominal thickness of the strip in mm. 5 Designation The material name comprises the following in the order given: a)

the letters “AM” for Fe-based amorphous material; b)

one hundred times the specified value of maximum specific total loss at a peak magnetic polarization of 1,3 T and 50 Hz, in watts per kilogram; c)

one thousand times the nominal thickness of the strip, in millimetres; d)

the characteristic letter; – “S” for conventional grades; – “P” for high permeability grades; e)

one tenth of the frequency 50 Hz, i.e. “5”; f)

one hundred times the specified value of the minimum stacking factor. EXAMPLE: AM10-25S5-84 for Fe-based amorphous strip of conventional grade with a maximum specific total loss at 1,3 T of 0,10 W/kg at 50 Hz, a nominal thickness of 0,025 mm and a minimum stacking factor of 0,84, supplied in the semi-processed state. 6 General requirements 6.1 Production process The production process of the strip and its chemical composition are left to the discretion of the manufacturer. SIST EN IEC 60404-8-11:2018

IEC 60404-8-11:2018 © IEC 2018 – 9 –

6.2 Form of supply The strip is supplied in coil. It shall be a single-ply coil made by a continuous single strip wound on a spool hub, or a multi-ply coil made by a number of strips simultaneously wound on a spool hub. The mass of the coils shall be agreed between the manufacturer and the purchaser at the time of enquiry and order. The recommended value for the internal diameter of spool hubs is approximately 406 mm. The outside diameter of coils should be at least 600 mm and should not exceed 1 120 mm. Strip shall be of constant width and wound in such a manner that the edges are superimposed in a regular manner and the side faces of the coil are substantially flat. Irregular deviations from flatness and/or the size and the number of voids or openings in the coil shall be agreed between the manufacturer and the purchaser at the time of enquiry and order. Coils shall be sufficiently tightly wound in order that they do not loosen under their own weight. In the case of multi-ply coils, strips may exhibit single-ply joints if agreed between the manufacturer and the purchaser at the time of enquiry and order. The shape of strip ends at the joint may be agreed between the manufacturer and the purchaser at the time of enquiry and order. The edges of parts jointed together shall not be so much out of alignment as to affect the further processing of the strip. 6.3 Delivery condition Fe-based amorphous strip is usually supplied without an insulating coating. An oxide layer is formed naturally on the strip surface during the manufacture of the strip. 6.4 Surface condition The surfaces shall be smooth and clean, free from grease and rust. No continuous indication of oxide shall be visible along the surfaces or edges of the strip. The surfaces and edges shall have no wrinkles, dimples, cracks, folds, flakes or other defects that would make the strip unsuitable for the fabrication of wound cores. Dispersed imperfections such as minor rusts, slight coloration, small pinholes, shallow dimples, etc. are permitted if they are not detrimental to the correct use of the supplied strip. The strip shall have no needle-like holes exceeding 7,0 mm in length. The strip shall have no more than eight needle-like holes aligned in the direction of casting of the strip in any 25 mm long segment. The strip edge shall have no slivers, nicks or feathers with a maximum dimension exceeding 4,0 mm. 6.5 Suitability for cutting The strip shall be suitable for cutting straight at any point when appropriate cutting tools are used. SIST EN IEC 60404-8-11:2018

– 10 – IEC 60404-8-11:2018 © IEC 2018 7 Technical requirements 7.1 Magnetic properties 7.1.1 Reference condition The properties defined in 7.1.2 and 7.1.3 shall apply only to test specimens in the reference condition which is obtained by the following magnetic annealing. The test specimens shall be subjected to magnetic annealing in a DC magnetic field directed parallel to the direction of casting, at least 1 600 A/m in strength and at a temperature in accordance with the specification of the manufacturer. The magnetic annealing shall be maintained for 2 h at the temperature and maintained until the temperature falls to 200 °C. NOTE 1 The magnetic annealing releases stress and induces magnetic anisotropy in the casting direction. NOTE 2 As a general guideline, the temperature for the magnetic annealing is below the onset of the crystallization temperature, which can be determined by differential scanning calorimetry (DSC) at a heating rate of 20 K/min, between 140 °C and 170 °C. The test specimen shall be kept flat during the magnetic annealing. The atmosphere of the magnetic annealing shall be dry and inert. A quick magnetic annealing may be performed at a higher temperature and for a shorter time than the above treatments by agreement between the manufacturer and the purchaser at the time of enquiry and order. NOTE 3 In the case of a quick magnetic annealing, the magnetic properties of the test specimen can be poorer than in the case of the reference condition. 7.1.2 Magnetic polarization The specified minimum values of peak magnetic polarization for a peak magnetic field strength of 80 A/m at 50 Hz or 60 Hz shall be as given in Table 1 and Table 2. 7.1.3 Specific total loss The specified values of maximum specific total loss at 1,3 T and 1,4 T shall be as given in Table 1 and Table 2 at 50 Hz. NOTE Annex A gives non-specified values of maximum specific total loss at 1,5 T. SIST EN IEC 60404-8-11:2018

IEC 60404-8-11:2018 © IEC 2018 – 11 –

Table 1 – Technological properties and magnetic properties of the conventional grades of Fe-based amorphous strip Material name Nominal thickness Maximum specific total loss at 1,3 Ta

W/kg Maximum specific total loss at 1,4 Ta

W/kg Minimum magnetic polarization for H = 80 A/ma, b Minimum stacking factor Conventional densityc

mm 50 Hz 60 Hzd 50 Hz 60 Hzd T
kg/dm3 AM08-25S5-90 0,025 0,08 0,11 0,11 0,14 1,35 0,90 7,20 AM08-25S5-88
0,88
AM08-25S5-86
0,86
AM08-25S5-84
0,84
AM10-25S5-90 0,025 0,10 0,13 0,13 0,17 1,35 0,90 7,20 AM10-25S5-88
0,88
AM10-25S5-86
0,86
AM10-25S5-84
0,84
AM12-25S5-90 0,025 0,12 0,15 0,16 0,20 1,35 0,90 7,20 AM12-25S5-88
0,88
AM12-25S5-86
0,86
AM12-25S5-84
0,84
AM16-25S5-90 0,025 0,16 0,20 0,21 0,26 1,35 0,90 7,20 AM16-25S5-88
0,88
AM16-25S5-86
0,86
AM16-25S5-84
0,84

a These values are valid only for test specimens in the reference condition (see 7.1.1). b Magnetic polarization (intrinsic flux density) is defined as follows in accordance with IEC 60050-121:

J = B – µ0 H
where
is the magnetic polarization;
is the magnetic flux density;
is the magnetic constant: 4 π × 10–7 H·m–1;
is the magnetic field strength.

NOTE The difference between B and J at 80 A/m is equal to 0,000 1 T. c Other values may be agreed between the manufacturer and the purchaser at the time of enquiry and order. d Only for information.

SIST EN IEC 60404-8-11:2018

– 12 – IEC 60404-8-11:2018 © IEC 2018 Table 2 – Technological properties and magnetic properties of the high permeability grades of Fe-based amorphous strip Material name Nominal thickness Maximum specific total loss at 1,3 Ta

W/kg Maximum specific tota
...

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