磁性材料.第8-7部分:单项材料规格.以全加工状态交货的冷轧晶粒定向电工钢片和钢带

[中文适用范围]： IEC 60404 的这一部分定义了标称厚度为 0.23 毫米、0.27 毫米、0.30 毫米和 0.35 毫米的冷轧晶粒取向电工钢带和薄板的等级。特别是给出了一般要求、磁性能、几何特性、公差和技术特性以及检验程序。本文件适用于在最终退火条件下以卷材或板材形式供应的高斯织构晶粒取向电工钢带和板材，用于磁路的构造。成绩分为两类：常规成绩；高渗透性等级，包括可以在领域精炼条件下交付的等级。它们对应于 IEC 60404-1 的 C22 类。 [外文原描述]： 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.