Table 1: Comparison of NiTi shape memory alloy with steel and aluminum alloys.

PropertyNiTiSteelAluminum alloys

Elastic modulus MPa (austenite)
1.4~2.8 × 104 MPa (martensite)
 MPa(70~73) × 103 MPa
Yield strength200~700 MPa (austenite)
70~140 MPa (martensite)
250~690 MPa230~500 MPa
Tensile strength900 MPa (fully annealed)
2000 MPa (work hardened)
400~760 MPa260~570 MPa
Recoverable elongation8%0.125~0.345%0.3~0.7%
Elongation at failure25~50% (fully annealed)
5~10% (work hardened)
17~21%11~19%