Is stainless steel magnetic?
In general, stainless steel is not magnetic in the form of austenite. However, martensite and ferrite will be magnetic, but austenite may also be magnetic. There are two reasons for this:
When solidifying, some of the magnetic properties will remain due to partial smelting. For example, it is normal for 304 to remain 3-8%. Therefore, austenite should be non-magnetic or weakly magnetic.
Austenitic stainless steel is non-magnetic, but after cold working hardening, the γ phase will be partially magnetized and will produce magnetism. The martensite structure can be removed by heat treatment to restore its non-magnetic properties.
Definition of stainless steel