Harry Brearley
Harry Brearley (18 February 1871 – 14 July 1948) was an English metallurgist, usually credited with the invention of "rustless steel" (later to be called "stainless steel" in the anglophone world).
Stainless steel
They are magnetic. They are not as corrosion resistant as the common ferritic and austenitic stainless steels due to their low chromium content.