Nitinol (NiTi)
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Basic Properties
| Alloy Type | |
|---|---|
| Designation | NiTi |
| Density | 6.45 g/cm³ |
| Melting Point | 1310°C |
Composition
| Element | Percentage |
|---|
Similar Alloys
Description
Shape memory alloy with unique superelastic and shape memory properties.
| Density | 6.45 g/cm³ |
|---|---|
| Electrical Resistivity | 100 μΩ·cm |
| Tensile Strength | 895-1900 MPa |
|---|---|
| Yield Strength | 100-800 MPa |
| Elongation | 1-50% |
| Hardness | 200-600 HV |
| Machinability | Difficult to machine. Requires careful control of temperatures and cutting conditions. |
| Melting Point | 1310°C |
|---|---|
| Thermal Conductivity | 8.6 W/(m·K) |
| Thermal Expansion | 11.0 × 10⁻⁶/°C |
| Heat Treatment | Shape memory training at 400-500°C. Precise temperature control critical. |
| Heat Treatment | Shape memory training at 400-500°C. Precise temperature control critical. |
|---|---|
| Corrosion Resistance | Excellent corrosion resistance and biocompatibility in biological environments. |
Applications
Medical devices, orthodontic wires, stents, actuators, eyeglass frames, robotics
History
Discovered at Naval Ordnance Laboratory. Named Ni-Ti-NOL (Nickel Titanium Naval Ordnance Laboratory).