Nitinol, an alloy of nickel and titanium, is known as the “Shape Memory” alloy due to its ability to undergo deformation at one temperature and then return to its original, undeformed shape at a different temperature. Nitinol is most commonly used in medical and dental devices. However, due to its Shape Memory Effect (SME) and superelasticity (SE) there is a growing interest in other industrial applications such as using springs for thermal actuators, electrical actuators, thermal valves and pneumatic valves for comfort seating.

Nitinol conforms to ASTM F2063: “Standard Specification for Wrought Nickel-Titanium Shape Memory Alloys for Medical Devices and Surgical Implants”.

Key material properties for Nitinol include:

  • Chemical composition
    • Ni: 54.5 – 57.0
    • C: 05 max
    • Co: 0.05 max
    • Cu: 0.01 max
    • Cr: 0.01 max
    • H: 0.005 max
    • Fe: 0.05 max
    • Nb: 0.025 max
    • N+O: 0.05 max
    • Ti: Balance
  • Diameter range: 0.008” – 0.0630”
  • Mechanical Properties: per request, based on conditions.
  • Transformation temperature of ingot (fully annealed): -25 degrees Celsius +/- 10 degrees Celsius
  • Permanent set after 6% strain: 0.5% max
  • Surface Condition
    • Pickled: color is silver – light grey
    • Light Oxide: color is golden – amber
    • Dark Oxide: color is dark blue – purple
  • Geometric & Package Options
    • Wound on spool
    • Cut length

For more information,  please inquire with our specialized sales team by calling 800-699-6633. Thank you.