IEC 60404-8-6:2016

IEC 60404-8-6 ®
Edition 3.0 2016-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic materials –
Part 8-6: Specifications for individual materials – Soft magnetic metallic
materials
Matériaux magnétiques –
Partie 8-6: Spécifications pour matériaux particuliers – Matériaux métalliques
magnétiquement doux
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IEC 60404-8-6 ®
Edition 3.0 2016-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic materials –
Part 8-6: Specifications for individual materials – Soft magnetic metallic

materials
Matériaux magnétiques –
Partie 8-6: Spécifications pour matériaux particuliers – Matériaux métalliques

magnétiquement doux
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.030 ISBN 978-2-8322-3674-1

– 2 – IEC 60404-8-6:2016 © IEC 2016
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations for test specimens . 8
4 Classification . 8
4.1 General . 8
4.2 Alloy class A (irons) . 9
4.3 Alloy class C (silicon steels). 9
4.4 Alloy class E (nickel-iron alloys) . 9
4.5 Alloy class F (cobalt-iron alloys) . 9
5 Designation . 9
6 General requirements . 9
6.1 Chemical composition and production process . 9
6.2 Delivery condition . 10
6.2.1 General . 10
6.2.2 Form of supply . 10
6.2.3 Surface condition . 10
7 Technical requirements . 10
7.1 Magnetic properties . 10
7.2 Geometric characteristics and tolerances . 11
7.2.1 Flat products: sheet, plate and strip . 11
7.2.2 Cold-worked bar, rod and wire . 11
7.2.3 Hot-finished bar . 11
8 Inspection and testing . 11
8.1 General . 11
8.2 Selection of samples . 12
8.2.1 General . 12
8.2.2 Flat products . 12
8.2.3 Long products . 12
8.2.4 Wire. 12
8.3 Magnetic properties . 12
8.3.1 Magnetic testing, DC measurements . 12
8.3.2 Magnetic testing, AC measurements . 12
8.3.3 Test specimens . 12
8.4 Geometric characteristics and tolerances . 12
8.4.1 Thickness of flat products . 12
8.4.2 Width of flat products . 12
8.4.3 Flatness . 12
8.4.4 Edge camber . 13
8.4.5 Dimensions of long products . 13
8.4.6 Straightness of long products . 13
8.5 Retests . 13
9 Complaints . 13
10 Ordering information . 13

11 Certification . 13
Bibliography . 20

Table 1 – Chemical composition of the alloy classes in accordance with IEC 60404-1 . 14
Table 2 – Minimum amplitude permeability requirements for sheet and strip – AC
measurement (50 Hz or 60 Hz), sine flux conditions, thickness 0,05 mm to 0,38 mm . 15
Table 3 – DC magnetic property requirements for bar, billet, rod, sheet, strip and wire,
thickness or diameter greater than 0,05 mm – S.R., L.R. or E.S. specimen . 16
Table 4 – Maximum permeability rise factor for sheet and strip – L.R. test specimen,
AC measurement (50 Hz or 60 Hz) . 17
Table 5 – Dimensional requirements for toroidal strip-wound cores . 17
Table 6 – Tolerances on thickness of cold-rolled sheet and strip . 18
Table 7 – Tolerances on width of sheet and strip . 18
Table 8 – Tolerances on dimensions of cold-worked bar, rod and wire . 19

– 4 – IEC 60404-8-6:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MAGNETIC MATERIALS –
Part 8-6: Specifications for individual materials –
Soft magnetic metallic materials

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
...