When I said at school, I meant the school of engineers in which I studied.
Here in France there are few engineers from universities, there is another course, called the "Grandes Ecoles" (which don't correspond at all to what you call high school, we call "lycées" this that you call high school) which we access by very selective competitions which have success rates of 10 % or less, after two years of "preparatory classes", where we do a lot of mathematics and physics, themselves reserved for the best pupils from high schools (lycées).
The best of these "Grandes Ecoles" are on the same level as your MIT.
To come back to stainless steels, it is true that austenitic steels are the most common and the others quite rare, hence the widely held idea, but not completely accurate, that stainless steels are non-magnetic.