Nitinol is a shape memory alloy. Nitinol has two unique properties, the shape memory and the superelasticity. These properties are resulting from the phase transformation of its crystal structure. The transformation is occuring when temperature is applied. Specifically, at lower temperatures the crystal structure is martensitic (weak form) and at higher temperatures austenitic (stronger than martensitic). Moreover, the martensitic structure can be found at higher temperatures where stress forces are applied.

The mechanical properties of Nitinol are changing with applied stresses and small changes in temperature.



Density ρ

6.5 g/cm³ at 20 °C


Melting point Tm

1310 °C

Chemical properties


Weight %



55 - 56 %

Technological properties

Application areas

Blood clot filters, cryogenic coupling rings, proportional control valves, orthodontic correction

This material data has been provided by Goodfellow.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.