Magnetic Properties of Spheroidal Graphite Cast Iron

The magnetic properties of spheroidal and fiake graphite cast-irons of similar composition, cast into sand moulds of various diameters, were measured, and the results obtained were as follows. At the degree of graphitization, the maximum induction B100, the coercive force Hc and the hysteresis loss Wh of spheroidal graphite cast iron are lower than that of flake graphite cast iron, and so the maximum permeability μm and the residual induction Br were higher. B100, Br, Hc and Wh decrease and μm increases with increasing degree of graphitization.