磁性材料 第 8-3 部分：单种材料规范 半加工状态交货的冷轧无取向电工钢带材和板材

[中文适用范围]： IEC 60404-8-3:2023 定义了以半加工状态交付的冷轧无取向电工钢带和板材的等级，标称厚度为 0.47 mm、0.50 mm、0.64 mm、0 ,65 毫米和 0,79 毫米。它给出了一般要求、磁性能、几何特性、公差和技术特性以及检验程序。 0.47 mm、0.64 mm 和 0.79 mm 的标称厚度适用于仅在 60 Hz 下使用的等级。本文件适用于以半加工状态交付的冷轧无取向电工钢带和板材，即未经最终热处理的卷材或板材，用于磁路构造。本文件不适用于以完全加工状态供应的材料。这些材料分别对应于 IEC 60404-1 的 B2 类和 C21 类。相对于前一版本，本版本包括以下重大技术变化： a) 修改了有关几何特性的术语和技术要求，以与 IEC 60404-9:2018 保持一致； b) 插入表 3——标称厚度的公差； c) 用于测定几何特性的试样长度从 2 m 改为 1 m; d) 删除带有欧洲钢材名称数字系统的附录 A。 [外文原描述]： IEC 60404-8-3:2023 defines the grades of cold-rolled non-oriented electrical steel strip and sheet delivered in the semi-processed state in nominal thicknesses of 0,47 mm, 0,50 mm, 0,64 mm, 0,65 mm and 0,79 mm. It gives general requirements, magnetic properties, geometric characteristics, tolerances and technical characteristics as well as inspection procedures. The nominal thicknesses of 0,47 mm, 0,64 mm and 0,79 mm apply to the grades for use at 60 Hz only. This document applies to cold-rolled non-oriented electrical steel strip and sheet delivered in the semi-processed state, i.e. without final heat treatment, in coils or sheets, and intended for the construction of magnetic circuits. This document does not apply to materials supplied in the fully-processed state. These materials correspond respectively to classes B2 and C21 of IEC 60404-1. This edition includes the following significant technical changes with respect to the previous edition: a) Modification of terms and technical requirements concerning geometrical characteristics to be consistent with IEC 60404-9:2018; b) Insertion of Table 3 – Tolerances on nominal thickness; c) Change of the length of the test specimen for determination of geometrical characteristics from 2 m to 1 m; d) Deletion of Annex A with the European numerical system of designation of steels.