IEC 61631:2020作为IEC 61631:2020 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 61631:2020规定了磁芯机械强度的测试方法由磁性氧化物制成。该测试方法适用于大多数E型芯、ETD型芯、I型芯和环形型芯，但其他型芯如U型芯可根据有关各方同意的衍生方法进行测试。本文件也适用于磁粉芯的机械强度测量。与上一版相比，此版本包括以下重大技术变更: -范围中增加了“本文件也适用于磁粉芯的机械强度测量”；-IEC 61246已被IEC 63093-8取代；EN 1002-2已被ISO 7500-1取代；ISO 4677-1和ISO 4677-2已被撤销； -图A.1和表A.1中的尺寸D和F已变更为与IEC 63093-8:20 18的图1一致； -增加环芯测试的内容； -增加附件B； -在图3中修改了夹具的位置； -在图5中，辊杆移动到I型芯的边缘，与芯对齐。

IEC 61631:2020 is available as IEC 61631:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 61631:2020 specifies a test method for the mechanical strength of cores made of magnetic oxides. This test method is suitable for most of the E-cores, ETD-cores, I-cores and ring-cores but other core types such as U-cores could be tested according to a derived method agreed by the parties concerned. This document is also applicable to the mechanical strength measurement of magnetic powder cores. This edition includes the following significant technical changes with respect to the previous edition:
- the phrase: "This document is also applicable to the mechanical strength measurement of magnetic powder cores" has been added in the scope;
- IEC 61246 has been replaced by IEC 63093-8; EN 1002-2 has been replaced by ISO 7500-1; ISO 4677-1 and ISO 4677-2 have been withdrawn;
- dimensions D and F in Figure A.1 and Table A.1 have been changed to be consistent with Figure 1 of IEC 63093-8:2018;
- addition of the content of ring-cores test;
- addition of Annex B;
- the location of the jig is amended in Figure 3;
- in Figure 5, the roller bars are moved to the edge of the I-core, aligned with the core.