๐๐ก๐๐ญ ๐๐๐ค๐๐ฌ ๐๐ญ๐๐ข๐ง๐ฅ๐๐ฌ๐ฌ ๐๐ญ๐๐๐ฅ ๐๐๐ ๐ง๐๐ญ๐ข๐?
For stainless steel to be magnetic, it must contain iron in its chemical composition. That takes care of the first requirement.
The second requirement is that the stainless steel must have its crystal structure be arranged in a ferrite or martensite structure.
If stainless steel is mostly comprised of an austenite structure, then it will not be magnetic.
Most stainless steels falling under this category are non-magnetic because they contain high amounts of austenite.
Even though some of the metals like grade 304 and 316 have iron in their chemical composition, they are austenite, meaning they are non-ferromagnetic.