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Magnetism developed by austenitic 304 stainless steel after cold worki

Magnetism developed by austenitic 304 stainless steel after cold worki

Magnetism developed by austenitic 304 stainless steel after cold worki

(OP)

Hi¡ everybody:

As we know, austenitic stainless steels show slight to severe magnetism depending on the amount of martensite transformation after cold working. However, I have not bibliography about it, Does any body have some literature to provide me.

One of my customers detected some magnetism on 304 ss (he produces storage tanks and, obviously, he had to roll the sheet), after the rolling operation he detected the magnetism. He is reluctant to believe that asutenitic ss becomes magnetic after forming operations.

Replies continue below

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RE: Magnetism developed by austenitic 304 stainless steel after cold worki

Tell him the guys on this forum said it's true!

RE: Magnetism developed by austenitic 304 stainless steel after cold worki

You tell em Metalguy....

nick

RE: Magnetism developed by austenitic 304 stainless steel after cold worki

One reference talking about this phoenenom is "Stainless Steels" by P. Lacombe, B. Baroux, G. Beranger with the cooperation of Ugine Stainless on page 563.  Copyright is 1993.

RE: Magnetism developed by austenitic 304 stainless steel after cold worki

Hard to find that book. The Metals Handbook or Stainless Steel Handbook also have this information.

RE: Magnetism developed by austenitic 304 stainless steel after cold worki



Obviously you customer is not doing his home work. The subject covered in various shop and machinists handbooks.

Extensive cold working as well as extensive heat treating can produce a significant increase in magnetic attration especially in 304

If it has iron in it, it is hard to keep it from being magnetic

RE: Magnetism developed by austenitic 304 stainless steel after cold worki

Take a look at the Avesta Polarit data sheet on Cr-Ni stainless steels.  It contains the statement that these alloys can become magnetic with cold working.  It can be found at

http://www.avestapolarit.com/upload/documents/technical/Cr-Ni.pdf

RE: Magnetism developed by austenitic 304 stainless steel after cold worki

RE: Magnetism developed by austenitic 304 stainless steel after cold worki

If the size is not too great sending the rolled sections for annealing will get rid of the induced magnetism.

RE: Magnetism developed by austenitic 304 stainless steel after cold worki

To see:
Peter Marshall: Austenitic Stainless Steels,
Kluwer Academic Publishers, Dordrecht Hardbound,
ISBN 0-85334-277-6
July 1984,  434 pp.

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