How to Demagnetize Steel

By John Papiewski

Automatic Demagnetizer

Step 1

Connect the automatic demagnetizer’s power plug to a standard alternating current outlet and turn the unit’s power on, if needed. Set it on a non-metallic table.



Step 2

Bring the magnetized steel item to within an inch or two of the demagnetizing surface or probe tip.

Step 3

Press the demagnetizer’s “trigger” button momentarily. The device runs through a demagnetization process automatically.

Step 4

Test the demagnetized item by attempting to pick up a staple or two. If the steel object is still magnetized, repeat the process.

Step 5

Set the demagnetized steel object aside at least a few feet away from the demagnetizer and repeat with another piece if needed.

Manual Demagnetizer

Step 1

Plug the demagnetizer into a standard AC outlet. Set it on a non-metallic work surface.

Step 2

Bring the magnetized steel object to within an inch or two of the demagnetizing surface or probe tip.

Step 3

Press the demagnetizer’s “trigger” button and hold it. Slowly withdraw the demagnetizer to a distance of a few feet. Release the button.

Step 4

Test the demagnetized item by attempting to pick up a staple. If the steel object is still magnetized, repeat the process.

Step 5

Set the steel object a few feet from the demagnetizer and repeat the process with another magnetized item, if needed.

Hammer Strikes

Step 1

Set the magnetized item on a sturdy, non-metallic work surface.

Step 2

Hit the steel object sharply a few times with a hammer.

Step 3

Test the steel item by attempting to pick up a staple or two. If it is still magnetized, repeat the process, but change the item’s orientation with respect to the Earth’s magnetic north; this helps prevent unwanted magnetic buildup from the Earth’s magnetic field.

Heating Steel

Step 1

Set the furnace on a sturdy, heatproof work surface in a well-ventilated area. Connect the furnace to a standard AC outlet.

Step 2

Place the magnetized steel object or objects in the furnace and close the door. Set the temperature to 770 degrees Celsius (1,417 degrees Fahrenheit). Turn the furnace on.

Step 3

Note the time when the temperature reaches the set value. Allow the furnace to remain at that temperature for at least five minutes. Turn the furnace off and allow it to cool to room temperature.

Step 4

Test the steel object by attempting to pick up staples. If it is still magnetized, repeat the process.

About the Author

Chicago native J.T. Barett has a Bachelor of Science in physics from Northeastern Illinois University and has been writing since 1991. He has contributed to "Foresight Update," a nanotechnology newsletter from the Foresight Institute. He also contributed to the book, "Nanotechnology: Molecular Speculations on Global Abundance."