This part of IEC 60404 specifies a method of measurement of the coercivity of magnetic 
materials in an open magnetic circuit. 
This document is applicable to all magnetic materials with coercivities from 0,2 A/m to 
160 kA/m.  
NOTE Examples of magnetic materials covered by this document are amorphous alloys, nanocrystalline alloys, all 
softmagnetic crystalline materials (e.g. Fe, FeSi-, CoFe- and FeNi-alloys), soft ferrites, hard metals, semi-hard 
magnetic alloys (e.g. FeCoTiAl-, FeCoV-, FeCrCo- and AlNiCo-alloys) [1] .  
Special precautions are to be taken in measuring coercivities below 40 A/m, in materials with 
high conductivity and in test specimens which have a shape different from ellipsoids (see 
Annex A).dition 2.0 2019-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Magnetic materials – Part 7: Method of measurement of the coercivity (up to 160 kA/m) of magnetic materials in an open magnetic circuit Matériaux magnétiques – Partie 7: Méthode de mesure de la coercitivité (jusqu'à 160 kA/m) des matériaux magnétiques en circuit magnétique ouvert IEC 60404-7:2019-01(en-fr) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright ？