Question

why pure iron is not used for making permanent magnet​

Answer 1

As the soft Iron cannot retain the electro magnetism after electric flow is stopped in the coil wound around the soft iron soft iron not used for making a permanent magnet. so the permanent magnets are made by the magnetic substances which can retain magnetism and have more retentivity like steel.

Answer 2

Because when pure iron is put in electricity it got magnetised but it's magnetic effects only last till the electricity is flowed in it but in parmanent magnet we need to place hard iron or alloy.