IEC 60404-7 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 to160 kA / m. document are amorphous alloys, nanocrystalline alloys, allsoftmagnetic crystalline materials (eg Fe, FeSi-, CoFe and FeNi-alloys), soft ferrites, hard metals, semi-hardmagnetic alloys (eg FeCoTiAl-, FeCoV-, FeCrCo- and AlNiCo-alloys ) [1] 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 (seeAnnex A).
