International Standards and Conformity Assessment for all electrical, electronic and related technologies

TC 68

Magnetic alloys and steels

 

Detail

Committee
Working Groups
Project Leader

Current

Status

Frcst Pub

Date

Stability

Date

TC 68WG 1Mr Régis LemaitrePPUB2020-092024

History

Stage
Document
Downloads
Decision Date
Target Date
ACD
68/613/RR PDF file 93 kB
2018-09-18 
CD
68/618/CD
PDF file 382 kB
2018-12-072018-12
PCC
2019-03-292019-03
A2CD
68/627/CC PDF file 243 kB
Word file 64 kB
2019-05-102019-11
A2CD
68/627A/CC PDF file 283 kB
Word file 81 kB
2019-05-102019-11
ACDV
2019-09-252019-09
TCDV
2019-09-262019-11
CCDV
68/641/CDV
PDF file 336 kB
2019-11-152019-11
PRVC
2020-02-072020-02
APUB
68/657/RVC PDF file 310 kB
Word file 68 kB
2020-05-082020-06
TPUB
2020-07-072020-06
DECPUB
2020-07-082020-08
RPUB
2020-07-142020-07
BPUB
2020-08-102020-10
PPUB
2020-09-092020-09
  

Abstract

IEC 60404-8-7:2020 is available as IEC 60404-8-7:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60404-8-7:2020 defines the grades of cold-rolled grain-oriented electrical steel strip and sheet in nominal thicknesses of 0,20 mm, 0,23 mm, 0,27 mm, 0,30 mm and 0,35 mm. In particular, it gives general requirements, magnetic properties, geometric characteristics, tolerances and technological characteristics, as well as inspection procedures. This document applies to Goss textured grain-oriented electrical steel strip and sheet supplied in the final annealed condition in coils or sheets, and intended for the construction of magnetic circuits. The grades are grouped into three classes:
- conventional grades;
- high permeability grades;
- magnetic domain refined high permeability grades.
They correspond to Class C22 of IEC 60404-1.
This edition includes the following significant technical changes with respect to the previous edition:
- insertion of a third class of grain-oriented electrical steels for magnetic domain refined high permeability grades;
- introduction of the single sheet tester (SST) method as reference measurement method for this third class of material together with a conversion factor for transposition of the SST measurement results to equivalent Epstein values;
- update of the electrical steel range to take account of the current offers and demands of grades.


Project

IEC 60404-8-7:2020 ED5

Magnetic materials - Part 8-7: Specifications for individual materials - Cold-rolled grain-oriented electrical steel strip and sheet delivered in the fully-processed state