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Magnetic grade steel

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I am looking for steel grade which could retain fairly good amount of ferromagnetism (residual magnetic field). I am looking to magnetize that steel with an electromagnet and want that steel to retain magnetism after the driving source is removed. Usually, screw drives are made of such steel and we can pick-up small objects (pins e.g.) with them. But I don't know which grade of steel that is or if there is some other grade with high magnetic properties? I will be thankful for any help.

Regards,

Arfan Ali
- Ringwood, Hampshire, United Kingdom

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Surely it is more difficult to find a steel that will not retain its magnetism. Virtually all steels, with the exception of some high alloy and stainless steels will retain their magnetism. To prevent them going rusty you may need to electroplate them, or perhaps coat them with electroless nickel.

Trevor Crichton
R&D practical scientist The Pheasantries - Chesham, U.K.

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