磁性材料.第8-7部分:单项材料规范.以完全加工状态交付的冷轧晶粒取向电工钢带和薄板

[中文适用范围]： IEC 60404-8-7:2020 定义了标称厚度为 0.20 mm、0.23 mm、0.27 mm、0.30 mm 和 0.35 mm 的冷轧取向硅钢带和片的牌号。特别是，它给出了通用要求、磁性能、几何特征、公差和技术特性以及检验程序。本文件适用于以最终退火状态（卷状或片状）供应的戈斯织构取向硅钢带和片，并用于制造磁路。这些牌号分为三类：普通牌号、高磁导率牌号和无磁畴细化高磁导率牌号。它们对应于 IEC 60404-1 中的 C22 类。 [外文原描述]： 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.