IEC 60404-8-7:2017

IEC 60404-8-7:2017

septembre 2017
Norme internationale Annulée

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

IEC 60404-8-7:2017 defines the grades of cold-rolled grain-oriented electrical steel strip and sheet in nominal thicknesses of 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 two classes:? conventional grades;? high permeability grades, including grades which may be delivered in the domain refined condition. They correspond to Class C22 of IEC 60404-1.This fourth edition cancels and replaces the third edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:? extension of the range of electrical steels to include the improved grades.

Informations générales

Collections

Normes internationales IEC

Date de publication

septembre 2017

Nombre de pages

19 p.

Référence

IEC 60404-8-7:2017

Numéro de tirage

4
Résumé
Magnetic materials - Part 8-7: Specifications for individual materials - Cold-rolled grain-oriented electrical steel strip and sheet delivered in the fully processed state

IEC 60404-8-7:2017 defines the grades of cold-rolled grain-oriented electrical steel strip and sheet in nominal thicknesses of 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 two classes:
? conventional grades;
? high permeability grades, including grades which may be delivered in the domain refined condition. They correspond to Class C22 of IEC 60404-1.
This fourth edition cancels and replaces the third edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
? extension of the range of electrical steels to include the improved grades.
Normes remplacées (1)
Norme internationale Annulée
Matériaux magnétiques - Partie 8-7: Spécifications pour matériaux particuliers - Bandes et tôles magnétiques en acier à grains orientés, laminées à froid et livrées à l'état fini

La CEI 60404-8-7:2008 définit les qualités de bandes et tôles magnétiques laminées à froid, en acier à grains orientés de 0,23 mm, 0,27 mm, 0,30 mm et 0,35 mm d'épaisseur nominale. Elle donne en particulier les exigences générales, les caractéristiques magnétiques, les caractéristiques géométriques et les tolérances, les caractéristiques technologiques ainsi que les procédures de contrôle. La présente norme est applicable aux bandes et tôles magnétiques en acier à grains orientés, à texture de Goss, livrées après recuit final en feuilles ou en bobines et destinées à la construction de circuits magnétiques. Les qualités sont groupées en deux classes: - qualités conventionnelles; - qualités à haute perméabilité. Elles correspondent à la Classe C.22 de la CEI 60404-1. Cette troisième édition annule et remplace la deuxième édition parue en 1998, dont elle constitue une révision technique. Cette révision étend la gamme d'aciers magnétiques afin d'inclure les qualités améliorées.

Norme remplacée par (1)
IEC 60404-8-7:2020
septembre 2020
Norme internationale En vigueur
Magnetic materials - Part 8-7: Specifications for individual materials - Cold-rolled grain-oriented electrical steel strip and sheet delivered in the fully-processed state

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.

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