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Old May 23rd 2017, 01:17 AM   #1
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Steel and magnetism

I'm curious as to why austenitic steel often happens to be unmagnetic or remanent. After all, steel is always partly made up of iron. Does it have anything to do witht he way it's hardened? In the process of hardening, can steel lose its magnetism? I have tried to find out by researching hardening, but nothing came up. Can someone explain why some steels are magnetic while others are not?
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Old May 24th 2017, 02:02 AM   #2
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Austenitic steel is often unmagnetic because of its structure. Even though in practice it does contain (small) amounts of ferrite and martensite, it's not enough to give it a significant amount of magnetism. It doesn't have anything to do with the way its hardened, altough I seem to remember reading somewhere on bortec that austenitic steel is preferred when it comes to hardening. I'm not completely sure why though. It's possible that austenitic steel is just more mallable and easier to handle.
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Old May 24th 2017, 02:08 AM   #3
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I put "why is austenitic steel not magnetic" in google search ... many people have asked that question , basically " austenitic steel has a crystal structure that has the electrons aligned randomly and precludes the atoms from being free to move into the orientation that we identify as magnetic"

Many articles from the above search.
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Old Jun 11th 2017, 11:10 PM   #4
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Originally Posted by plotter View Post
I'm curious as to why austenitic steel often happens to be unmagnetic or remanent. After all, steel is always partly made up of iron. Does it have anything to do witht he way it's hardened? In the process of hardening, can steel lose its magnetism? I have tried to find out by researching hardening, but nothing came up. Can someone explain why some steels are magnetic while others are not?


See: https://www.scientificamerican.com/a...gnets-work-on/
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Old Nov 2nd 2017, 07:31 AM   #5
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Sorry for the late reply but thank you, this helped a lot.
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