IEC 60404-8-1:20 23规定了技术上重要的永磁（硬磁）材料的主要磁性能和尺寸公差的最小值。 仅供参考，本文件提供了材料的密度值及其化学成分范围。 与上一版相比，第四版包括以下重大技术变更: a)包括最近开发的各向异性REFeB热变形磁体和各向异性HDDR REFeB粘结磁体； b)包括通过La和Co取代稳定的高能Ca-La-Co铁氧体； c)增加了新型高性能等级的REFeB和RE2Co17烧结磁体以及各向同性REFeN粘结磁体。

IEC 60404-8-1:2023 specifies minimum values for the principal magnetic properties of, and dimensional tolerances for, technically important permanent magnet (magnetically hard) materials.
For information purposes only, this document provides values for the densities of the materials and the ranges of their chemical compositions.
This fourth edition includes the following significant technical changes with respect to the previous edition:
a) recently developed anisotropic REFeB hot deformed magnets and anisotropic HDDR REFeB bonded magnets are included;
b) high energy Ca-La-Co ferrites stabilized by La and Co substitution are included;
c) new and high-performance grades of REFeB and RE2Co17 sintered magnets and isotropic REFeN bonded magnets are added.