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Nitinol or Nickel Titanium (also known as NiTi) is in the unique class of shape memory alloys. Nitinol shape memory alloys can be modified to a great extent by changes in composition, mechanical working, and heat treatment.

Discover the Properties of Nitinol

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Nitinol Transformation Properties
Transformation Temperature   -200 to 110 deg. C
Latent Heat of Transformation   5.78 cal/g

Transformation Strain

(for polycrystalline material)

for a single cycle max 8%
for 100 cycles 6%
for 100,000 cycles 4%
Hysteresis**   30 to 50 deg. C

 

Nitinol Wire

We have the brightest Nitinol Wire in a wide range of sizes, alloys and finishes. View our Nitinol Wire Stock List & contact us for quick turn around on your R&D projects!

 

Nitinol Physical Properties
Melting Point   1300 deg. C (2370 deg. F)
Density   6.45 g/cu.cm (0.233 lb/cu.in)
Thermal Conductivity austenite 0.18 W/cm * deg. C (10.4 BTU/ft * hr * deg. F)
martensite 0.086 W/cm * deg. C (5.0 BTU/ft * hr * deg. F)
Coefficient of Thermal Expansion austenite 11.0E-6/deg. C (6.11E-6/deg. F)
martensite 6.6E-6/deg. C (3.67E-6/deg. F)
Specific Heat   0.20 cal/g * deg. C (0.20 BTU/lb * deg. F)
Corrosion Performance***   excellent
 
 

Nitinol Tubing

We offer Nitinol Tubing in a wide range of diameters, including large diameter, thin wall and microlumen tubing. View our Stock List & contact us for quick turn around on your R&D projects!

 

Electrical and Magnetic Properties

Resistivity [resistance = resistivity * length / cross-sectional area]

austenite pprox. 100 micro-ohms * cm (39 micro-ohms * in)
martensite approx. 80 micro-ohms * cm (32 micro-ohms * in)
Magnetic Permeability   < 1.002
Magnetic Susceptibility   3.0E6 emu/g

 

Nitinol Sheet & Foil

We offer Nitinol Sheet & Foil in a wide range of sizes and thicknesses. View our Nitinol Sheet Stock List & contact us for quick turn around on your R&D projects!

 

Nitinol Mechanical Properties
Young's Modulus**** austenite approx. 83 GPa (12E6 psi)
martensite approx. 28 to 41 GPa (4E6 to 6E6 psi)
Yield Strength austenite 195 to 690 MPa (28 to 100 ksi)
martensite 70 to 140 MPa (10 to 20 ksi)
Ultimate Tensile Strength fully annealed 895 MPa (130 ksi)
work hardened 1900 MPa (275 ksi)
Poisson's Ratio 0.33
Elongation at Failure fully annealed 25 to 50%
work hardened 5 to 10%
Hot Workability   quite good
Cold Workability   difficult due to rapid work hardening
Machinability   difficult, abrasive techniques preferred

 

 

Nitinol Technical Properties Legend
** Values listed are for a full martensite to austenite transition. Nitinol Wire
** Hysteresis can be significantly reduced by partial transformation or ternary alloys.
*** Similar to 300 series stainless steel or titanium
**** Highly nonlinear with temperature