1.1 This test method covers the tension testing of superelastic nickel-titanium (nitinol) materials, specifically the methods of determination of upper plateau strength, lower plateau strength, residual elongation, tensile strength, and elongation. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any