1) Cobalt alloy 
Alacrite is a family of cobalt-based alloys. One member of the family, XSH Alacrite, also known as L605, is described as `a non-magnetic, stainless super-alloy whose high surface hardness enables one to achieve a mirror quality polish`. It was `originally developed for use in aircraft.` Another use is in drug-eluting stents. The Institut Natio...