EN 60404-8-1:2015

Magnetic materials - Part 8-1: Specifications for individual materials - Magnetically hard materials

IEC 60404-8-1:2015 specifies minimum values for the principal magnetic properties of, and dimensional tolerances for, technically important magnetically hard materials (permanent magnets). For information purposes only, this part of IEC 60404 provides values for the densities of the materials and the ranges of their chemical compositions. Some additional physical data and mechanical reference values concerning the magnetic materials are given for information and comparison purposes. This edition includes the following significant technical changes with respect to the previous edition: a) recently developed anisotropic Sm-Fe-N bonded magnets are included; b) high energy ferrites with La and Co as substituents are included.

Magnetische Werkstoffe - Teil 8-1: Anforderungen an einzelne Werkstoffe - Hartmagnetische Werkstoffe (Dauermagnete)

Matériaux magnétiques - Partie 8-1: Spécifications pour matériaux particuliers - Matériaux magnétiquement durs

L'IEC 60404-8-1:2015 spécifie les valeurs minimales des principales propriétés magnétiques des matériaux magnétiques durs importants d'un point de vue technique (aimants permanents) ainsi que leurs tolérances sur les dimensions. La présente partie de l'IEC 60404 donne uniquement à titre indicatif des valeurs de masses volumiques des matériaux et les plages de leur composition chimique. Dans un but d'information et de comparaison, quelques données physiques et valeurs mécaniques de référence sur les matériaux magnétiques sont aussi données au Tableau A.1. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) elle inclut les aimants agglomérés Sm-Fe-N anisotropes récemment développés; b) elle inclut les ferrites haute énergie avec les remplaçants La et Co.

Magnetni materiali - 8-1. del: Specifikacije za posamezne materiale - Trdomagnetni materiali

Ta del standarda IEC 60404 določa najmanjše vrednosti za osnovne magnetne lastnosti in dimenzijske tolerance za tehnično pomembne trdomagnetne materiale (permanetni magneti).
Ta del standarda IEC 60404 informativno podaja vrednosti za gostote materialov in razpone njihovih kemičnih sestavov.
OPOMBA Nekateri dodatni fizični podatki in mehanske referenčne vrednosti magnetnih materialov so podani v tabeli A.1 v informativne namene in za namene primerjave.

General Information

• Status: Published
• Publication Date: 28-May-2015
• Withdrawal Date: 30-Apr-2018
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 29.030 - Magnetic materials
• Technical Committee: CLC/SR 68 - Magnetic alloys and steels
• Drafting Committee: IEC/TC 68 - IEC_TC_68
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 29-May-2015
• Completion Date: 29-May-2015
• Ref Project: SIST EN 60404-8-1:2015 - Magnetic materials - Part 8-1: Specifications for individual materials - Magnetically hard materials

Relations

• Replaced By: EN IEC 60404-8-1:2023 - Magnetic materials - Part 8-1: Specifications for individual materials - Permanent magnet (magnetically hard) materials
• Effective Date: 08-Jun-2021

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2015
Magnetni materiali - 8-1. del: Specifikacije za posamezne materiale - Trdomagnetni
materiali
Magnetic materials - Part 8-1: Specifications for individual materials - Magnetically hard
materials
Magnetische Werkstoffe - Teil 8-1: Anforderungen an einzelne Werkstoffe -
Hartmagnetische Werkstoffe (Dauermagnete)
Matériaux magnétiques - Partie 8-1: Spécifications pour matériaux particuliers -
Matériaux magnétiquement durs
Ta slovenski standard je istoveten z: EN 60404-8-1:2015
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 60404-8-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2015
ICS 29.030; 17.220.20
English Version
Magnetic materials - Part 8-1: Specifications for individual
materials - Magnetically hard materials
(IEC 60404-8-1:2015)
Matériaux magnétiques - Partie 8-1: Spécifications pour Magnetische Werkstoffe - Teil 8-1: Anforderungen an
matériaux particuliers - Matériaux magnétiquement durs einzelne Werkstoffe - Hartmagnetische Werkstoffe
(IEC 60404-8-1:2015) (Dauermagnete)
(IEC 60404-8-1:2015)
This European Standard was approved by CENELEC on 2015-05-01. 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, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60404-8-1:2015 E
Foreword
The text of document 68/495/FDIS, future edition 3 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 60404-8-1:2015.
The following dates are fixed:
(dop) 2016-02-01
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2018-05-01
• latest date by which the national standards conflicting with
the document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 60404-8-1:2015 was approved by CENELEC as a
European Standard without any modification.

- 3 - EN 60404-8-1:2015
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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 cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When 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 series International electrotechnical vocabulary - -
IEC 60404-5 -  Magnetic materials - - -
Part 5: Permanent magnet (magnetically
hard) materials - Methods of measurement
of magnetic properties
IEC 60404-8-1 ®
Edition 3.0 2015-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic materials –
Part 8-1: Specifications for individual materials – Magnetically hard materials

Matériaux magnétiques –
Partie 8-1: Spécifications pour matériaux particuliers – Matériaux

magnétiquement durs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20; 29.030 ISBN 978-2-8322-2429-8

– 2 – IEC 60404-8-1:2015 © IEC 2015
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references. 7
3 Terms and definitions . 7
4 Types of materials and their applications . 7
5 Classification . 8
5.1 General . 8
5.2 Principal magnetic properties . 8
5.3 Additional magnetic properties . 9
6 Chemical composition . 10
7 Densities . 10
8 Designation . 10
9 Mode of shipment and dimensions . 10
10 Testing . 10
10.1 Extent of testing . 10
10.2 Testing methods . 10
11 Grounds for rejection . 11
12 Description of tables of standard properties . 11
12.1 Magnetically hard alloys . 11
12.1.1 Aluminium-nickel-cobalt-iron-titanium alloys (AINiCo) . 11
12.1.2 Chromium-iron-cobalt alloys (CrFeCo) . 12
12.1.3 Iron-cobalt-vanadium-chromium alloys (FeCoVCr) . 12
12.1.4 Rare earth-cobalt alloys (RECo) . 13
12.1.5 Rare earth-iron-boron alloys (REFeB) . 14
12.2 Magnetically hard ceramics (magnetically hard ferrites) . 14
12.2.1 Chemical composition . 14
12.2.2 Manufacturing method . 15
12.2.3 Sub-classification . 15
12.2.4 Magnetic properties and densities . 15
12.2.5 Dimensional tolerances . 15
12.3 Bonded magnets . 15
12.3.1 General . 15
12.3.2 Chemical composition . 15
12.3.3 Manufacturing method . 16
12.3.4 Sub-classification . 16
12.3.5 Magnetic properties and densities . 17
12.3.6 Dimensional tolerances . 17
13 Irreversible demagnetization behaviour . 17
13.1 General . 17
13.2 General definition of demagnetization field strength H . 18
D
13.3 Simplified definition of demagnetization field strength H . 18
D
14 Tables 10 to 23 . 20
Annex A (informative) Physical data and mechanical reference values of AINiCo,
CrFeCo, FeCoVCr, SmCo, NdFeB, hard ferrite and bonded SmFeN magnets . 34

IEC 60404-8-1:2015 © IEC 2015 – 3 –
Bibliography . 36

Figure 1 – Graphic representation of B(H) and J(H) demagnetization and recoil curves . 19
Figure 2 – Simplified evaluation of B(H) and J(H) demagnetization and recoil curves . 20

Table 1 – Classification of magnetically hard materials . 8
and units
Table 2 – Magnetic properties — Symbols . 9
Table 3 – Additional magnetic properties — Symbols and units . 9
Table 4 — Chemical compositions of AlNiCo alloys (% mass fraction) . 11
Table 5 — Chemical compositions of CrFeCo alloys (% mass fraction) . 12
Table 6 — Chemical compositions of FeCoVCr alloys (% mass fraction) . 12
Table 7 – Chemical compositions of RECo alloys (% mass fraction) . 13
Table 8 – Chemical compositions of REFeB alloys (% mass fraction) . 14
Table 9 – Chemical compositions of REFeN alloys for bonded magnet (% mass
fraction) . 16
Table 10 – Magnetic properties and densities of AlNiCo magnets . 21
Table 11 – Magnetic properties and densities of CrFeCo and FeCoVCr magnets . 22
Table 12 – Magnetic properties and densities of RECo magnets . 23
Table 13 – Magnetic properties and densities of REFeB magnets . 24
Table 14 – Magnetic properties and densities of hard ferrites . 25
Table 15 – Magnetic properties and densities of isotropic AlNiCo alloys with organic
binder . 26
Table 16 – Magnetic properties and densities of RECo alloys with organic binder . 27
Table 17 – Magnetic properties and densities of isotropic REFeB alloys with organic
binder . 28
Table 18 – Magnetic properties and densities of isotropic and anisotropic hard ferrites
with organic binder . 29
Table 19 – Magnetic properties and densities of anisotropic REFeN alloys with organic
binder . 30
Table 20 – Dimensional tolerances (as cast or as sintered) of magnets made from
AlNiCo alloys . 31
Table 21 – Dimensiona
...

SLOVENSKI STANDARD
01-september-2015
Magnetni materiali - 8-1. del: Specifikacije za posamezne materiale - Trdomagnetni
materiali
Magnetic materials - Part 8-1: Specifications for individual materials - Magnetically hard
materials
Magnetische Werkstoffe - Teil 8-1: Anforderungen an einzelne Werkstoffe -
Hartmagnetische Werkstoffe (Dauermagnete)
Matériaux magnétiques - Partie 8-1: Spécifications pour matériaux particuliers -
Matériaux magnétiquement durs
Ta slovenski standard je istoveten z: EN 60404-8-1:2015
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ 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 60404-8-1

NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2015
ICS 29.030; 17.220.20
English Version
Magnetic materials - Part 8-1: Specifications for individual
materials - Magnetically hard materials
(IEC 60404-8-1:2015)
Matériaux magnétiques - Partie 8-1: Spécifications pour Magnetische Werkstoffe - Teil 8-1: Anforderungen an
matériaux particuliers - Matériaux magnétiquement durs einzelne Werkstoffe - Hartmagnetische Werkstoffe
(IEC 60404-8-1:2015) (Dauermagnete)
(IEC 60404-8-1:2015)
This European Standard was approved by CENELEC on 2015-05-01. 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, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60404-8-1:2015 E
Foreword
The text of document 68/495/FDIS, future edition 3 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 60404-8-1:2015.
The following dates are fixed:
(dop) 2016-02-01
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2018-05-01
• latest date by which the national standards conflicting with
the document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 60404-8-1:2015 was approved by CENELEC as a
European Standard without any modification.

- 3 - EN 60404-8-1:2015
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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 cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When 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 series International electrotechnical vocabulary - -
IEC 60404-5 -  Magnetic materials - - -
Part 5: Permanent magnet (magnetically
hard) materials - Methods of measurement
of magnetic properties
IEC 60404-8-1 ®
Edition 3.0 2015-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic materials –
Part 8-1: Specifications for individual materials – Magnetically hard materials

Matériaux magnétiques –
Partie 8-1: Spécifications pour matériaux particuliers – Matériaux

magnétiquement durs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20; 29.030 ISBN 978-2-8322-2429-8

– 2 – IEC 60404-8-1:2015 © IEC 2015
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references. 7
3 Terms and definitions . 7
4 Types of materials and their applications . 7
5 Classification . 8
5.1 General . 8
5.2 Principal magnetic properties . 8
5.3 Additional magnetic properties . 9
6 Chemical composition . 10
7 Densities . 10
8 Designation . 10
9 Mode of shipment and dimensions . 10
10 Testing . 10
10.1 Extent of testing . 10
10.2 Testing methods . 10
11 Grounds for rejection . 11
12 Description of tables of standard properties . 11
12.1 Magnetically hard alloys . 11
12.1.1 Aluminium-nickel-cobalt-iron-titanium alloys (AINiCo) . 11
12.1.2 Chromium-iron-cobalt alloys (CrFeCo) . 12
12.1.3 Iron-cobalt-vanadium-chromium alloys (FeCoVCr) . 12
12.1.4 Rare earth-cobalt alloys (RECo) . 13
12.1.5 Rare earth-iron-boron alloys (REFeB) . 14
12.2 Magnetically hard ceramics (magnetically hard ferrites) . 14
12.2.1 Chemical composition . 14
12.2.2 Manufacturing method . 15
12.2.3 Sub-classification . 15
12.2.4 Magnetic properties and densities . 15
12.2.5 Dimensional tolerances . 15
12.3 Bonded magnets . 15
12.3.1 General . 15
12.3.2 Chemical composition . 15
12.3.3 Manufacturing method . 16
12.3.4 Sub-classification . 16
12.3.5 Magnetic properties and densities . 17
12.3.6 Dimensional tolerances . 17
13 Irreversible demagnetization behaviour . 17
13.1 General . 17
13.2 General definition of demagnetization field strength H . 18
D
13.3 Simplified definition of demagnetization field strength H . 18
D
14 Tables 10 to 23 . 20
Annex A (informative) Physical data and mechanical reference values of AINiCo,
CrFeCo, FeCoVCr, SmCo, NdFeB, hard ferrite and bonded SmFeN magnets . 34

IEC 60404-8-1:2015 © IEC 2015 – 3 –
Bibliography . 36

Figure 1 – Graphic representation of B(H) and J(H) demagnetization and recoil curves . 19
Figure 2 – Simplified evaluation of B(H) and J(H) demagnetization and recoil curves . 20

Table 1 – Classification of magnetically hard materials . 8
and units
Table 2 – Magnetic properties — Symbols . 9
Table 3 – Additional magnetic properties — Symbols and units . 9
Table 4 — Chemical compositions of AlNiCo alloys (% mass fraction) . 11
Table 5 — Chemical compositions of CrFeCo alloys (% mass fraction) . 12
Table 6 — Chemical compositions of FeCoVCr alloys (% mass fraction) . 12
Table 7 – Chemical compositions of RECo alloys (% mass fraction) . 13
Table 8 – Chemical compositions of REFeB alloys (% mass fraction) . 14
Table 9 – Chemical compositions of REFeN alloys for bonded magnet (% mass
fraction) . 16
Table 10 – Magnetic properties and densities of AlNiCo magnets . 21
Table 11 – Magnetic properties and densities of CrFeCo and FeCoVCr magnets . 22
Table 12 – Magnetic properties and densities of RECo magnets . 23
Table 13 – Magnetic properties and densities of REFeB magnets . 24
Table 14 – Magnetic properties and densities of hard ferrites . 25
Table 15 – Magnetic properties and densities of isotropic AlNiCo alloys with organic
binder . 26
Table 16 – Magnetic properties and densities of RECo alloys with organic binder . 27
Table 17 – Magnetic properties and densities of isotropic REFeB alloys with organic
binder . 28
Table 18 – Magnetic properties and densities of isotropic and anisotropic hard ferrites
with organic binder . 29
Table 19 – Magnetic properties and densities of anisotropic REFeN alloys with organic
binder . 30
Table 20 – Dimensional tolerances (as cast or as sintered) of magnets made from
AlNiCo alloys . 31
Table 21 – Dimensional tolerances of cold rolled strips of FeCoVCr and CrFeCo alloys
with a maximum thickness of 6 mm and maximum width of 125 mm . 32
Table 22 – Dimensional tolerances of the diameter of cold drawn wires and bars of
FeCoVCr and CrFeCo alloys .
...