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。本标准适用于最终退火状态下以片材或卷材形式供应的高斯织构晶粒取向电工钢带和片材，用于磁路结构。等级分为两类： - 常规等级； - 高渗透性等级。它们符合 IEC 60404-1 的 C.22 类。 [外文原描述]： IEC 60404-8-7:2008 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 standard applies to Goss textured grain-oriented electrical steel strip and sheet supplied in the final annealed condition in sheets or coils, and intended for the construction of magnetic circuits. The grades are grouped into two classes: - conventional grades; - high permeability grades. They correspond to Class C.22 of IEC 60404-1. This third edition cancels and replaces the second edition published in 1998 of which it constitutes a technical revision. This revision extends the range of electrical steels to include the improved grades.