磁性材料.第8-4部分:单项材料规范.在完全加工状态下交付的冷轧无取向电工钢带和薄板

[中文适用范围]： 本部分IEC 60404-4规定了名义厚度为0,35 mm、0,47 mm、0,50 mm、0,65 mm和1,00 mm的冷轧无取向电工钢带和片的等级。特别是，它给出了通用要求、磁性能、几何特征、公差和技术性能以及检验程序。名义厚度0,47 mm仅适用于仅用于60 Hz的等级。本文件适用于以完全处理状态（即最终退火状态，以线圈或片状形式）供应的冷轧无取向电工钢带和片，用于制造磁路。本文件不适用于以半处理状态供应的材料。注：以半处理状态供应的冷轧无取向电工钢带和片在IEC 60404-8-3中规定。本文件中定义的等级对应于IEC 60404-1中的C21类。 [外文原描述]： IEC 60404-8-4:2022 defines the grades of cold-rolled non-oriented electrical steel strip and sheet in nominal thicknesses of 0,35 mm, 0,47 mm, 0,50 mm, 0,65 mm and 1,00 mm. In particular, it gives general requirements, magnetic properties, geometric characteristics, tolerances and technological characteristics, as well as inspection procedure. The nominal thickness 0,47 mm applies to the grades for use at 60 Hz only. This document applies to cold-rolled non-oriented electrical steel strip and sheet supplied in the fully-processed state, i.e. the final annealed condition, in coils or sheets, and intended for the construction of magnetic circuits. This document does not apply to materials supplied in the semi-processed state. This edition includes the following significant technical changes with respect to the previous edition: - modification of terms and technical requirements concerning geometrical characteristics to be consistent with IEC 60404-9:2018; - insertion of Table 3 - Tolerances on nominal thickness; - change of the length of test specimen for determination of geometrical characteristics from 2 m to 1 m.