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  #11  
Old 01-30-2019, 01:34 PM
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digr digr is offline
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I see said the blind man to his death wife as he picked up his hammer and saw
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  #12  
Old 02-01-2019, 01:28 AM
Don_S Don_S is offline
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Quote:
Originally Posted by USMCPOP View Post
A few bits of info:

Wrought, austenitic stainless steels, such as 304 and 316, are generally regarded as non-magnetic in the annealed condition, ie they are not attracted significantly by a magnet. However, if they are cold worked they will be attracted to a permanent magnet.
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It is possible for the magnetic permeability of austenitic steels to be changed during processing. For example, cold work and welding are liable to increase the amount of martensite and ferrite respectively in the steel. A familiar example is in a stainless steel sink where the flat drainer has little magnetic response whereas the pressed bowl has a higher response due to the formation of martensite particularly in the corners.
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https://www.finishing.com/454/35.shtml
It's pretty common for austenitic stainless steels to be slightly magnetic after cold work. The magnetism is not nearly as much as carbon steels but it is noticeable. Machining will add a small amount of cold work but drawing or cold heading can make non-magnetic stainless steel slightly magnetic.

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