EN IEC 60404-8-1:2023

SLOVENSKI STANDARD
01-december-2023
Magnetni materiali - 8-1. del: Specifikacije za posamezne materiale - Materiali za
permanentne (trdomagnetne) magnete (IEC 60404-8-1:2023)
Magnetic materials - Part 8-1: Specifications for individual materials - Permanent magnet
(magnetically hard) materials (IEC 60404-8-1:2023)
Magnetische Werkstoffe - Teil 8-1: Anforderungen an einzelne Werkstoffe -
Hartmagnetische Werkstoffe (Dauermagnete) (IEC 60404-8-1:2023)
Matériaux magnétiques - Partie 8-1: Spécifications pour matériaux particuliers -
Matériaux (magnétiques durs) pour aimants permanents (IEC 60404-8-1:2023)
Ta slovenski standard je istoveten z: EN IEC 60404-8-1:2023
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
29.030 Magnetni materiali Magnetic materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60404-8-1

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2023
ICS 29.030; 17.220.20 Supersedes EN 60404-8-1:2015
English Version
Magnetic materials - Part 8-1: Specifications for individual
materials - Permanent magnet (magnetically hard) materials
(IEC 60404-8-1:2023)
Matériaux magnétiques - Partie 8-1: Spécifications pour Magnetische Werkstoffe - Teil 8-1: Anforderungen an
matériaux particuliers - Matériaux (magnétiques durs) pour einzelne Werkstoffe - Hartmagnetische Werkstoffe
aimants permanents (Dauermagnete)
(IEC 60404-8-1:2023) (IEC 60404-8-1:2023)
This European Standard was approved by CENELEC on 2023-10-25. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60404-8-1:2023 E

European foreword
The text of document 68/732/CDV, future edition 4 of IEC 60404-8-1, prepared by IEC/TC 68
"Magnetic alloys and steels" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 60404-8-1:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-07-25
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-10-25
document have to be withdrawn
This document supersedes EN 60404-8-1:2015 and all of its amendments and corrigenda (if any).
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60404-8-1:2023 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60404-1:2016 NOTE Approved as EN 60404-1:2017 (not modified)
IEC 60404-7:2019 NOTE Approved as EN IEC 60404-7:2020 (not modified)
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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-121 - International Electrotechnical Vocabulary - - -
Part 121: Electromagnetism
IEC 60050-151 - International Electrotechnical Vocabulary - - -
Part 151: Electrical and magnetic devices
IEC 60050-221 - International Electrotechnical Vocabulary. - -
Chapter 221: Magnetic materials and
components
IEC 60404-5 2015 Magnetic materials - Part 5: Permanent EN 60404-5 2015
magnet (magnetically hard) materials -
Methods of measurement of magnetic
properties
IEC 60404-8-1 ®
Edition 4.0 2023-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic materials –
Part 8-1: Specifications for individual materials – Permanent magnet

(magnetically hard) materials
Matériaux magnétiques –
Partie 8-1: Spécifications pour matériaux particuliers – Matériaux (magnétiques

durs) pour aimants permanents
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20, 29.030 ISBN 978-2-8322-7503-0

– 2 – IEC 60404-8-1:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Types of materials and their applications . 9
5 Classification . 9
5.1 General . 9
5.2 Principal magnetic properties . 10
5.3 Additional magnetic properties . 10
6 Chemical composition . 11
7 Densities . 11
8 Designation . 11
9 Mode of shipment and dimensions . 11
10 Testing . 12
10.1 Extent of testing . 12
10.2 Testing methods . 12
11 Grounds for rejection . 12
12 Description of tables of standard properties . 12
12.1 Magnetically hard alloys . 12
12.1.1 Aluminium-nickel-cobalt-iron-titanium alloys (AINiCo) . 12
12.1.2 Chromium-iron-cobalt alloys (CrFeCo) . 13
12.1.3 Iron-cobalt-vanadium-chromium alloys (FeCoVCr) . 14
12.1.4 Rare earth-cobalt alloys (RECo) . 14
12.1.5 Rare earth-iron-boron sintered and hot deformed magnets (REFeB) . 15
12.2 Magnetically hard ceramics (magnetically hard ferrites) . 16
12.2.1 Chemical composition . 16
12.2.2 Manufacturing method . 17
12.2.3 Sub-classification . 17
12.2.4 Magnetic properties and densities . 17
12.2.5 Dimensional tolerances . 17
12.3 Bonded magnetically hard materials (Bonded magnets) . 17
12.3.1 General . 17
12.3.2 Magnet materials . 17
12.3.3 Manufacturing method . 18
12.3.4 Sub-classification . 18
12.3.5 Magnetic properties and densities . 20
12.3.6 Dimensional tolerances . 20
13 Irreversible demagnetization behaviour . 20
13.1 General . 20
13.2 General definition of demagnetization field strength H . 20
D
13.3 Simplified definition of demagnetization field strength H . 21
D
14 Tables 10 to 25 . 23

IEC 60404-8-1:2023 © IEC 2023 – 3 –
Annex A (informative) Physical data and mechanical reference values of AINiCo,
CrFeCo, FeCoVCr, SmCo, NdFeB, hard ferrite and SmFeN bonded magnets . 43
Annex B (informative) Grain boundary diffusion (GBD) process for REFeB sintered

magnets . 45
Annex C (informative) Cerium-iron-boron sintered magnets (CeFeB) . 46
Bibliography . 47

Figure 1 – Graphic representation of B(H) and J(H) demagnetization and recoil curves . 21
Figure 2 – Simplified evaluation of B(H) and J(H) demagnetization and recoil curves . 23
Figure B.1 – Example of coercivity gain of GBD processed sintered REFeB magnets in
dependence of the distance to the magnet surface . 45
Figure C.1 – Manufacturing flow chart of CeFeB sintered magnets . 46

Table 1 – Classification of permanent magnet (magnetically hard) materials . 9
and units
Table 2 – Magnetic properties – Symbols . 10
Table 3 – Additional magnetic properties – Symbols and units . 10
Table 4 – Chemical compositions of AlNiCo alloys (% mass fraction) – for information
purposes only . 12
Table 5 – Chemical compositions of CrFeCo alloys (% mass fraction) – for information
purposes only . 13
Table 6 – Chemical compositions of FeCoVCr alloys (% mass fraction) – for
information purposes only . 14
Table 7 – Chemical compositions of RECo alloys (% mass fraction) – for information

purpo
...