The magnetic permeability of electromagnetic pure iron ranges from 200 to 600, which means that under the same magnetic field strength, the magnetic induction intensity in electromagnetic pure iron is hundreds of times that in vacuum. In addition, the magnetic permeability of electromagnetic pure iron is also affected by its purity and impurity content. For example, the purity of electromagnetic pure iron can reach 99.8% to 99.9%, with high saturation magnetic induction intensity, low coercive force, and a maximum magnetic permeability of about 6.25 to 12.50mH/m.
