Soft magnetic materials are used for the manufacture AC/DC magnetic cores. They are intended for the manufacture of poles and anchors of DC machines, rotors and stators of induction motors, magnetic circuits for large electrical machines, power transformers, instruments, etc.

Soft magnetic materials must meet the following requirements: high permeability, low coercivity, low loss on reversal, high electrical resistance to reduce losses related to eddy currents.

The most common soft magnetic materials are iron and electrical steels. Technically pure iron contains albeit in small quantities, carbon, silicon, manganese, sulfur and other elements that impair its magnetic quality.