scope:

This Standard defines the grades of thin non-oriented electrical steel strip and sheet in nominal thicknesses of 0.05 mm, 0.10 mm, 0.15 mm, 0.20 mm, 0.25 mm, 0.30 mm and 0.35 mm (hereafter referred to as the thin non-oriented electrical steel strips), and of thin grain-oriented electrical steel strip and sheet in nominal thicknesses of 0.05 mm, 0.10 mm, 0.15 mm and 0.18 mm (hereafter referred to as the thin grain-oriented electrical steel strips). It gives general requirements, magnetic properties, geometric characteristics and tolerances, technological characteristics, as well as inspection procedures.

NOTE 1 For the thin non-oriented electrical steel strips, other nominal thicknesses (i.e. 0.12 mm, 0.18 mm, 0.23 mm and 0.27 mm) may be upon the agreement between the manufacturer and the purchaser.

This Standard applies to the thin non-oriented electrical steel strips and the thin grain-oriented electrical steel strips (hereafter simply referred to as the steel strips) supplied in the finally annealed condition in coils and intended for the construction of magnetic circuits used at frequencies in the range from 100 Hz to 10 kHz.

NOTE 2 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

IEC 60404-8-8 : 2017 Magnetic materials - Part 8-8 : Specifications for individual materials - Thin electrical steel strip and sheet for use at medium frequencies (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.