Categorized as warmer grades of Nitinol, shape memory is more appropriate for use in high-temperature industrial applications. Shape memory grades are also widely used in Nitinol actuators.
Shape memory isn't limited to use in industrial applications. Designs often leverage phase transformation at body temperature (37°C [98.6°F]), making shape memory Nitinol useful for medical devices.
Examples of uses for shape memory grades
NiTi #5 and #6 are commonly used in high temperature actuators, including locking/latching systems and vents/valves
NiTi #8 is typically used in applications that require a phase transformation at body temperature.
All binary Nitinol grades meet the chemistry requirements set forth by ASTM F2063 for use in surgical implants.
Mechanical properties
The possibilities for Nitinol feel practically endless. You can use the following information to learn more about shape memory Nitinol, and the markets we serve.
|
Product |
NiTi #5 | NiTi #6 | NiTi #8 |
| Ingot Aₛ |
≥ 85 °C |
35 °C to 85 °C [95 °F to 185 °F] |
10 °C to 35 °C [50 °F to 95 °F] |
| Cold worked |
|||
| UTS |
1310 MPa |
1310 MPa [190 ksi] |
1517 MPa [220 ksi] |
|
Elongation |
> 3% |
> 3% | > 3% |
|
Straight annealed |
|||
| UTS |
1069 MPA |
1069 MPa [155 ksi] |
1103 MPa [160 ksi] |
| Elongation |
> 10% |
> 10% | > 10% |
| Active Aᶠ |
≥ 85 °C |
40 °C to 80 °C [104 °F to 176 °F] |
22 °C to 40 °C [71.6 °F to 104 °F] |
| Notes |
All mechanical testing conducted at 22 °C ± 2 °C [71.6 °F ± 3.6 °F]. Please note that a correlation study may be required to switch test methods on an existing part. |
||
The markets we serve
While serving medical markets is our bread and butter, we have increasingly applied our Nitinol knowledge to support non-medical applications.
- Cardiac rhythm management
- Endoscopy
- Implant dentistry
- Neurostimulation
- Non-medical applications
- Orthodontic
- Orthopaedic
- Vascular therapy
Less is more with Nitinol actuators
Actuator wire can perform work through a phase transformation. Simply put, a bias load or force will elongate the wire, and a phase change induced using heat or electricity will cause the wire to contract. As the material cycles, contracting as heat is applied and elongating as it cools, the actuator performs work, which could include pulling a release valve, lifting loads, or otherwise applying force. Using a wire to perform work has several advantages. At the forefront is its high work density, meaning it can generate a large amount of work for a relatively small footprint. Another benefit is its comparative silence by eliminating the need for noisy motors.
You can learn more about actuator wire here.
Need something extra special?
Our unique product offerings could be just what you're looking for if the typical grades of Nitinol aren't quite right. From ultra-smooth oxide free Silk® Nitinol wire, to ultra-stiff USN® wire, you'll find all kinds of material solutions right here.