Nitinol Wire

Nitinol is a nickel-titanium alloy with super-elastic and shape memory properties. Nitinol's shape memory characteristic allows it to undergo deformation at one temperature, then recover its original, under formed shape upon heating above its transformation temperature. Nitinol wire can also exhibit enormous elasticity, some 10-30 times that of ordinary metal.

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Nitinol Shaped, Flat, Square, Round, Fine Wire, Black Oxide, Custom Oxides and Oxide Free (Oxides removed mechanically or chemically) Nitinol Wire ASTM F2063 (Chemistry)
* Rolled from flat wire

Nitinol Wire Description


Nitinol is a nickel-titanium alloy with super elasticity and shape memory properties. Shape memory refers to the ability of Nitinol to undergo deformation at one temperature, then recover its original, under formed shape upon heating above its transformation temperature. Super elasticity occurs at a narrow temperature range just above its transformation temperature; in this case, no heating is necessary to cause the under formed shape to recover, and the material exhibits enormous elasticity, some 10-30 times that of ordinary metal.

Nitinol Wire Applications

What is Nitinol used for?
  • Heat engines
  • Resilient glass frames
  • Orthodontic arc wire
  • Medical devices
  • Actuators
  • High reliability couplings
  • Temperature control system couplings

Chemistry: Typical

ElementMinMax
Nickel
55%
56%
Titanium
44%
45%

Physical Properties


Density, 0.2633 lbs/in³, 6.45 g/cm³

Electrical Resistivity: Ω-cm
Austenite: 82 x 10
Martensite: 76 x 10

Thermal Conductivity, W/cm°C
Austenite : 0.18
Martensite: 0.086

Mean Coefficient of Thermal Expansion, in/in/°F (μm/m•K) 80- 200°F (27- 93°C)
Austenite: 6.1 x 10 (11)
Martensite: 3.6 x 10 (6.6)

Modulus of Elasticity, KSI (MPa)
Austenite: 10.08-12.04 x 10³, (75-83 x 10³)
Martensite: 4.06-5.80 x 10³, (28-40 x 10³)

Melting Point: 2930°F (1310°C)

Mechanical Properties of Nitinol Wire at Room Temperature *


NiTi Properties: Annealed Typical


Ultimate Tensile Strength: 130 KSI (895 MPA)
Yield Strength (0.2 Offset):
Austenite: 28-100 KSI (195-690 MPa)
Martensite: 10-20 KSI (70-140 MPa)
Elongation: 25-50%

Nitinol Properties: Tempered Typical


Ultimate Tensile Strength: 275 KSI (1900 MPA)
Elongation: 5-10%

* For more detailed information contact Ulbrich Wire

Properties Tempered


Nitinol can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.

Additional Properties of Nitinol


Nitinol Wire Finishes


Black OxideAdds mild corrosion resistance, for appearance and to minimize light reflection.
Custom Oxides
Custom and common oxide finishes available. Annealed in a controlled environment.
Oxide FreeOxides removed mechanically or chemically


Special finishes are available: Contact Ulbrich Wire Sales with special finish and plating requests.

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels and Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the ‘applications’ noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.

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