Letter 35083

Removing magnetism from stainless steel 304 [Pakistan] 

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

Shahzad Amin
Sitara Factory - Pakistan

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.
plz reply me soon by mechanical means.
thanks
qaisar

qaisar abbas
home - Pakistan

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

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

Bill Reynolds
Tasmet Systems - Melbourne, Victoria, Australia

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, PA, USA

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