Core of Electromagnet

Core of electromagnet, or solenoid iron core, or solenoid plunger is the final actuating component of a solenoid. When the coil is energized, the coil will create a magnetic field and the solenoid iron core will move to change a flow path. And when the electricity is off, the magnetic field disappear and the solenoid iron core will become un-magnetic so the solenoid iron core will return to its original position.

Carbon steel is the traditional magnetizable material (except the stainless steel). The higher carton level in the material, the stronger the magnetic field will be. To make solenoid iron core, the most suitable material is soft iron, not steels. When the steels are magnetized, they will keep the magnetic as long as the power is still on.

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