[2] One member of the family, XSH Alacrite,[4] is described as "a non-magnetic, stainless super-alloy whose high surface hardness enables one to achieve a mirror quality polish.
"[5] The Institut National de Métrologie in France has also used the material as a kilogram mass standard.
[5][6] L-605 is composed primarily of cobalt (Co), with a specified mixture of chromium (Cr), tungsten (W), nickel (Ni), iron (Fe) and carbon (C), as well as small amounts of manganese (Mn), silicon (Si), and phosphorus (P).
It has also been used in aerospace components and turbine engines as well as drug-eluting and other kinds of stents due to its biocompatibility.
[2] When used for implantable medical devices, the ASTM F90-09 and ISO 5832-5:2005 specifications dictate how L-605 is manufactured and tested.