This part of IEC 60404 specifies the general requirements, magnetic properties, geometric
characteristics and tolerances as well as inspection procedures for pure iron, silicon-iron,
nickel-iron and cobalt-iron. The materials are in the form of bar, billet, sheet, strip or wire. The
alloys covered correspond to those defined by classes A, C1, C2, E1 to E4 and F1 to F3 in
IEC 60404-1.
Magnetic materials used primarily for relays, pure iron and steel products, classified only by
coercivity, are covered in IEC 60404-8-10. IEC 60404-8-10 is less restrictive in terms of
magnetic properties than the pure iron material (class A) and the silicon-iron alloys (classes
C21 and C22) specified in this standard, but it gives more comprehensive dimensional
tolerances.
Non-oriented and oriented silicon steels (C21 and C22) for industrial power frequency
applications, classified by specific total loss, are covered in IEC 60404-8-2, IEC 60404-8-4 and
IEC 60404-8-7.
Non-oriented and oriented thin magnetic materials for use at medium frequencies, classified by
specific total loss, are covered in IEC 60404-8-8.
BS EN 60404-8-6:2009 history
2020BS EN 60404-8-6:2017 Magnetic materials. Specifications for individual materials. Soft magnetic metallic materials
2009BS EN 60404-8-6:2009 Magnetic materials. Specifications for individual materials. Soft magnetic metallic materials
1989BS 6404-8.6:1988 Magnetic materials - Individual materials - Specification for soft magnetic metallic materials