http://en.wikipedia.org/wiki/Nitinol_60 http://en.wikipedia.org/wiki/Nitinol_60 "NiTiNOL 60, or 60 NiTiNOL, is a Nickel Titanium alloy (nominally Ni-40wt% Ti)

http://en.wikipedia.org/wiki/Nitinol_60 http://en.wikipedia.org/wiki/Nitinol_60 "NiTiNOL 60, or 60 NiTiNOL, is a Nickel Titanium alloy (nominally Ni-40wt% Ti) discovered in the late 1950s by the U. S. Naval Ordnance Laboratory (hence the "NOL" portion of the name NiTiNOL). Depending upon the heat treat history, 60 NiTiNOL has the ability to exhibit either superelastic properties in the hardened state or shape memory characteristics in the softened state."