Can Stainless Steel Be Magnetic?

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SUMMARY

Stainless steel exhibits varying magnetic properties depending on its composition and crystal structure. The 400 series stainless steels, such as 440C, are generally magnetic, while the 300 series, including 304 and 316, are predominantly non-magnetic due to their austenitic structure. The presence of nickel reduces magnetism, while ferritic structures are magnetic. Additionally, temperature changes can induce phase transitions in austenitic stainless steels, potentially altering their magnetic properties.

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  • Understanding of stainless steel classifications (e.g., 300 series vs. 400 series)
  • Knowledge of crystal structures (ferritic vs. austenitic)
  • Familiarity with magnetic properties (ferromagnetism, paramagnetism)
  • Basic principles of thermodynamics and phase transitions
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  • #31
The abstract of this article implies that the austenitic-to-martensitic transformation in SS316 occurs ~40 kelvin when cooling the sample.

http://jap.aip.org/resource/1/japiau/v108/i4/p043904_s1?isAuthorized=no

Does it transform back to austenitic at 40 kelvin when temperature is rising?

Bob S
 
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  • #32
Well, that can't be the same thing used for making blades, unless it differs with alloy, since that is a balmy 77.36 liquid nitrogen bath.
 

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