Superelastic alloy

A superelastic alloy formed by addition of Fe to an Au—Cu—Al alloy, wherein the superelastic alloy comprises:

• Cu of 12.5% by mass or more and 16.5% by mass or less;
• Al of 3.1% by mass or more and 5.5% by mass or less;
• Fe of 0.9% by mass or more and 2.0% by mass or less;
• a balance of Au, and further wherein a difference between the Al content and the Cu content (Cu—Al) is 12% by mass or less:
• and
• wherein the superelastic alloy has a superelastic shape recovery rate of 40% or more calculated by a following equation based on a plastic strain at the time of 2% strain measured when the superelastic alloy is subjected to a tensile test and an unloaded residual strain:
• Superelastic shape recovery rate (%)=(plastic strain (%) at the time of 2% strain−residual strain (%))/plastic strain at the time of 2% strain×100 [Equation 1]
• wherein plastic strain is a value obtained by exclusion of an elastic deformation strain from a total deformation strain.