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The Magic Cafe Forum Index » » The workshop » » Magnetizing Iron? (1 Likes) Printer Friendly Version

David Todd
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Inner circle
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I have heard that it is possible to induce a piece of iron to become permanently magnetic by exposing it to a powerful magnetic field.

Does anyone know how long it would take to make a small piece of iron permanently magnetized?
kaytracy
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Inner circle
Central California
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That will depend on the magnet you are using to work with it, and many other variables like heat and quality of the steel (has to do with the alignment of the molecules).
Depending on your needs, magnets do come in a large variety of shapes and sizes, and remember that by sticking a magnet to the bit of steel, you allow it to share some of those properties......if you wanted a pen case, for example, to be magnetic, as long as it is steel (stainless does not always work well--a test of the quality!) you could place a small magnet inside the pen case ON THE case itself, and get a magnetized case.
Feel free to pm me if I am not clear.
Kay and Tory
www.Bizarremagick.com
sniper1
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malta eu
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The best way to magnetise iron or steel is this:

Get a flat piece of iron, and a flat bar magnet.
Now take, for example, the north tip side of the magnet, place it in the middle of the iron bar and stroke it across from the middle to the left about 30 times. Then repeat the same thing with sought tip of magnet but stroking from middle to right this time.
THE MOST CRAZY MAGICIAN ON THE MALTESE ISLANDS
magicWCK
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5 Posts

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I dig out a coin shell from my dusted box. It used to be a magnetised coin shell ( so that it can hold an 'inner' coin for spectator examination ). However, the magnetism seems have lost. How can I 'restore' the magnet power of the coin shell ?
Bill Hegbli
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Eternal Order
Fort Wayne, Indiana
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Quote:
On Aug 4, 2019, magicWCK wrote:
I dig out a coin shell from my dusted box. It used to be a magnetized coin shell ( so that it can hold an 'inner' coin for spectator examination ). However, the magnetism seems have lost. How can I 'restore' the magnet power of the coin shell ?


Try Harbor Freight, they have tools that re-magnetize tools that have lost the ability to hold screws and nails. Or, exposing the shell to a strong magnet and rubbing back and forth will bring back the magnetism for a while. I suggest you wrap a piece of felt over the coin, so you don't scratch it up during the rubbing. All magnets loose their power over time. It does not take long to regenerate a magnetic surface.
Vietnam Veteran 1967, Sgt. E-5

Graduate of Chavez College of Prestidigitation and Showmanship

"Magic With A Twist Of Comedy"
Wravyn
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By rubbing the iron with a magnet , you will be able to make a magnet. Yet if you coil wire around the iron to make an electro magnet, it too will magnetize the iron. The more coils wrapped, the stronger the field of magnetism. Of course your power supply must be taken into consideration too. Depending on what you are wanting to do also, just by attaching a small strong magnet to the iron will turn it into a magnet and just keeping it on the iron can cause the electrons to align north/south. It is my understanding that the piece of iron will not be as strong as the original magnet.
You ask how long does it take, it really depends on the strength you are seeking, the size of iron and also the magnetic field you are exposing the iron to. A needle sized piece of iron and a pk style magnet, almost instantly, yet a refrigerator magnet and same piece of iron would take quite some time; a ten penny nail and pk magnet would take longer and I doubt the refrigerator magnet would have much affect to the nail. So, to say how long it would take, I believe it is impossible to give an exact timeframe.
randirain
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Fort Worth, TX
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When magnetizing something, it has to do with the spin of the free electrons. When it comes to iron, it comes in hard and soft.
This has to do with how much carbon is in it, because most iron products aren't pure iron, it's an alloy.
Soft iron is paramagnetic, hard iron is ferromagnetic. Soft iron, being paramangetic, can, and will eventually stop being magnetic.
Hard iron, being ferromagnetic, can, and will keep it's magnetic property.
Here's a webpage that explains it better...

https://pediaa.com/difference-between-ha......ft-iron/
Image
Anverdi-museum
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A few years ago I built an electronic close up pad with hidden coils inside which I made from windings around ferrite cores. The whole contraption boils down to magnets, electro magnets, careful placement of Reed switches to turn on and animate objects, even flip cards over. I made the whole unit remote control, attached is a link to view a very short demonstration: https://m.youtube.com/watch?v=fxKU51J89Z8

Chuck C.
Jonathan Townsend
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Eternal Order
Ossining, NY
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Quote:
On Jun 1, 2004, David Todd wrote:
I have heard that it is possible to induce a piece of iron to become permanently magnetic by exposing it to a powerful magnetic field.

Does anyone know how long it would take to make a small piece of iron permanently magnetized?

Yes, there's an industrial tool to do exactly that. Larger machine shops tend to have it. Look for a local factory. Smile
...to all the coins I've dropped here
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