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Removing magnetism from stainless steel 304

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I want to remove magnetism from stainless steel 304 Products after they are cold worked.
thanks.

Shahzad Amin
factory - Pakistan

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plz tell me the ways to get rid of magnetic property of my cold worked stainless steel 304 hinges, as my customers are not in the sense of magnetic property in steel.
please reply me soon by mechanical means.
thanks
qaisar

qaisar abbas
home - Pakistan

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1st of two simultaneous responses--May +++++

If your parts are magnetic, i.e. they will stick to a piece of iron, then you can run them through a degausser. That electrical instrument will expose the parts to alternating polarity, continually decreasing magnitude magnetic fields. This will remove residual magnetism.

If you want your cold worked 300 series stainless steel parts to be paramagnetic rather than ferromagnetic, then you need to anneal them. My preference is to do so in accordance with AMS 2759/4, as I believe it sets reasonable controls for the process. That document is available from SAE.

Lee Gearhart
- East Aurora, NY

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2nd of two simultaneous responses-- May +++++

Heat to 1050-1100 degrees C and fast-cool.

Bill Reynolds    consultant metallurgist Ballarat, Victoria, Australia It is this website's profoundly sad duty to relate the news that Bill passed away on Jan. 29, 2010.

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March 3, 2008

If you heat it, even with a torch, and or stress relieve cold formed 300 series, it will remove the magnetic properties.

Dan Magalich
- Pittsburgh, Pennsylvania, USA

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July 26, 2011 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

how to remove magnetic properties from ss 304 screws, washers & spring washers

huzefa sabuwala
trader - secunderabad, andhra pradesh, India

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July 28, 2011

Hi, Huzefa.

As you see, we appended your inquiry to a thread which already answers it. You can remove true magnetism (that is, where the screws attract iron) with an electrical degausser. But you can only remove ferromagnetism (that is, where a magnet attracts the screws) through re-heating to change the crystal structure. Good luck.

Regards,

Ted Mooney, P.E. finishing.com Brick, New Jersey