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IEC 60404-8-5
Edition 2.0 2020-08
INTERNATIONAL
STANDARD
Magnetic materials –
Part 8-5: Specifications for individual materials – Electrical steel strip and sheet
with specified mechanical properties and magnetic polarization
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IEC 60404-8-5
Edition 2.0 2020-08
INTERNATIONAL
STANDARD
Magnetic materials –
Part 8-5: Specifications for individual materials – Electrical steel strip and sheet
with specified mechanical properties and magnetic polarization
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.030; 17.220.20 ISBN 978-2-8322-8747-7
– 2 – IEC 60404-8-5:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Classification . 8
5 Designation . 8
6 General requirements . 9
6.1 Production process . 9
6.2 Form of supply . 9
6.3 Delivery condition . 9
6.4 Surface condition . 10
6.5 Suitability for cutting . 10
6.6 Suitability for welding . 10
7 Technical requirements . 10
7.1 Mechanical properties . 10
7.2 Magnetic polarization . 10
7.3 Geometrical characteristics and tolerances . 12
7.3.1 Thickness . 12
7.3.2 Width . 14
7.3.3 Length . 14
7.3.4 Edge wave (wave factor) . 15
7.3.5 Residual curvature . 15
7.3.6 Edge camber . 16
7.4 Technological characteristics . 16
7.4.1 Density . 16
8 Inspection and testing . 16
8.1 General . 16
8.2 Selection of test samples . 17
8.3 Preparation of test specimens . 17
8.3.1 Mechanical properties . 17
8.3.2 Magnetic polarization . 17
8.3.3 Geometrical characteristics and tolerances . 18
8.4 Test methods . 18
8.4.1 General . 18
8.4.2 Mechanical properties . 18
8.4.3 Magnetic polarization . 18
8.4.4 Geometrical characteristics and tolerances . 18
8.5 Retests . 19
9 Marking, labelling and packaging . 19
10 Complaints . 19
11 Information to be supplied by the purchaser . 19
Table 1 – Mechanical and magnetic characteristics for hot-rolled grades . 11
Table 2 – Mechanical and magnetic characteristics for cold-rolled grades . 12
Table 3 – Tolerance on nominal thickness for hot-rolled grades . 13
Table 4 – Tolerance on nominal thickness for cold-rolled grades . 13
Table 5 – Maximum difference in thickness in a direction perpendicular to the direction
of rolling for hot-rolled grades . 13
Table 6 – Maximum difference in thickness in a direction perpendicular to the direction
of rolling for cold-rolled grades . 14
Table 7 – Tolerance on nominal width of products supplied with trimmed edges . 14
Table 8 – Tolerance on nominal length of sheets . 15
Table 9 – Maximum distance between the lower face of a test specimen and the flat
surface table for hot-rolled grades . 15
Table 10 – Maximum distance between the lower face of a test specimen and the flat
surface table for cold-rolled grades . 16
Table 11 – Minimum number of Epstein test strips . 17
– 4 – IEC 60404-8-5:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MAGNETIC MATERIALS –
Part 8-5: Specifications for individual materials –
Electrical steel strip and sheet with specified mechanical
properties and magnetic polarization
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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International Standard IEC 60404-8-5 has been prepared by IEC technical committee 68:
Magnetic alloys and steels.
This second edition cancels and replaces the first edition published in 1989. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) extension of the range of products to include the improved grades;
b) division of "flatness" into "edge wave (wave factor)" and "residual curvature" in consistent
with IEC 60404-9;
c) change length of test specimen for determinations of geometrical characters from 2 m to
1 m.
The text of this International Standard is based on the following documents:
CDV Report on voting
68/648/CDV 68/662/RVC
Full information on the voting for the approval of this International Standard can be
...