+AMD1:2026 CSV 磁性材料 第8-3部分：个别材料规范 以半加工状态交付的冷轧无取向电工钢带和薄板

[中文适用范围]： IEC 60404-8-3:2023+AMD1:2026 CSV 标准规定了以半加工状态交付、公称厚度为0.47毫米、0.50毫米、0.64毫米、0.65毫米及0.79毫米的冷轧非取向电工钢带和钢板的牌号。该标准涵盖了一般要求、磁性能、几何特性、公差、技术特性以及检验程序。其中，0.47毫米、0.64毫米和0.79毫米的公称厚度仅适用于60赫兹用途的牌号。 本文件适用于以半加工状态（即未经最终热处理）交付、以卷料或板材形式供应、用于磁路构建的冷轧非取向电工钢带和钢板；不适用于已完全加工状态供应的材料。此类完全加工状态材料分别对应IEC 60404-1中的B2级和C21级。 相对于前一版本，本版主要技术变更包括：a) 修订了术语及关于几何特性的技术要求，以与IEC 60404-9:2018保持一致；b) 新增表3“公称厚度公差”；c) 将测定几何特性的试样长度由2米改为1米；d) 删除了原附录A（欧洲钢号数字命名体系）。 [外文原描述]： IEC 60404-8-3:2023+AMD1:2026 CSV 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.