Temperature control nitinol spring is a spring made of nitinol titanium alloy. This kind of spring has temperature control characteristics, that is, when it is affected by heat, the spring will automatically stretch or shorten to achieve the purpose of temperature control.
This material is also called Nitinol (Nickel Titanium). Nitinol is a metal alloy with shape memory and superelasticity, consisting of titanium and nickel. This spring is commonly used in medical equipment, aerospace devices, electronic devices, and other fields. It has excellent mechanical properties and can withstand the intrusion of high-pressure, high-temperature, and high-stress environments. At the same time, it can also be precisely controlled and adjusted to meet the needs of various application scenarios.
Shape memory properties: Nitinol is a flexible and pliable material at low temperatures, but automatically returns to its preset shape when heated to a specific temperature. This automatic shape correction function is used in many medical devices, eyeglass frames, braces, mechanical parts, and other fields.
Super elastic: Nitinol can return to its original shape when twisted and bent. This property makes it widely used in the medical field, such as stents, heart valves, vascular interventional stents, and so on.
1. AF Transformation Temperature
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Nitinol Standard ASTM F2063 |
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Name |
Grade |
AF Transformation Temperature |
Form |
Standard |
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Shape Memory Nitinol Alloy |
Ti-Ni-01 |
20 °C~ 40 °C |
Wire, Rod, Plate, Tube, Spring |
Customer specified or Industry-standard |
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Ti-Ni-02 |
45 °C~ 90 °C |
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Superelastic Nitinol Alloy |
TiNi-SS |
-5 °C~ 5 °C |
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Low-Temperature Superelastic Nitinol Alloy |
TN3 |
-5°C~ -15°C -20°C~( -30°C) |
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TNC |
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Medical Nitinol Alloy |
TiNi-SS |
33°C ± 3 °C |
ASTM F2063 |
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Narrow Hysteresis Nitinol Alloy |
Ti-Ni-Cu |
As-Ms ≤ 5 °C |
Wire, bar |
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Wide Hysteresis Nitinol Alloy |
Ti-Ni-Fe |
As-Ms ≤ 150 °C |
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2. Mechanical properties
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The Production Mechanical behavior |
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Specification (mm) |
Shape Memory Nitinol Rod |
Typical Medical Industry Application |
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UTS (Mpa) |
Elongation |
UpperPlateau Stress Mpa |
Permanent Set after 6% strain % |
Active AF |
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3mm~5mm |
≥950 |
≥15 |
≥480 |
<0.5 |
Subzero20~100 |
Shape set parts, Orthodontic Files fishing rod. |
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5mm~20mm |
≥820 |
≥15 |
≥440 |
<0.5 |
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20mm~40 |
≥650 |
≥15 |
≥440 |
<0.5 |
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3. Chemical composition
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Alloy Types |
Chemical composition |
Af (Fully annealed) |
Min. elongation to failure [%] |
Max. Residual elongation after 6% strain [%] |
Main Applications |
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Superelastic Ni-Ti alloy |
TiNi-SS |
Ti-50.8at% |
-5°C ± 5°C. |
10 |
0.1 |
Eyeglass Frames, Cellular Phone Antennae, Bra Underwire |
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TN3 TNC |
TiNiVAl TiNiCr |
-40°C ~50°C |
10 |
0.1 |
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Body temperature Ni-Ti alloy |
TiNi-YY |
Ti-50.7at%Ni |
Functional Af=33 ± 3 |
15 |
0.1 |
Implantable devices, Bone staples Vascular Stents |
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Ti-Ni-01 |
55.6~55.8 wt%Ni |
20 - 40 |
15 |
0.1 |
Guide wires, Stents Orthodontic Arches |
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High-temperature Ni-Ti alloy |
Ti-Ni-02 |
54.8~55.5wt%Ni |
45 - 95 |
10 |
0.1 |
Implantable active devices, Surgical tools, Thermostats Coffeepots |
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TiNiCu |
TiNiCu |
As-Ms ≤ 5 |
10 |
0.1 |
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Temperature control nitinol spring is a temperature-regulating spring based on Shape Memory Alloy technology. The spring is made of Nitinol (nickel-titanium alloy), a special alloy material with shape memory and superelasticity, which can automatically deform at different temperatures.
When nitinol spring is heated, it automatically changes shape through the shape memory effect, providing the desired binding force. Conversely, when the temperature drops, the spring will continue to deform automatically, releasing the binding force.
Therefore, nitinol spring can adjust its elasticity according to the ambient temperature, realizing automatic control and regulation. It is widely used in many applications, such as in medical devices, automatic control systems, construction, and automotive industries.
The working principle of Nitinol spring is based on the phase change effect. When the temperature rises to the phase transition temperature, the lattice structure of the Nitinol material changes, allowing the spring to assume its original shape.
The phase transition temperature of Nitinol is usually between 60°C and 130°C, depending on the material composition and processing.
4. The application fields of temperature control nitinol spring are very wide, the following are some common fields
1) Medical device field: It can be used in the manufacture of stent products, catheter products, and other medical devices.
2) Auto parts field: It can be used to manufacture automotive air conditioners, water pumps, oil pumps, and other components.
3) Electronic field: It can be used to manufacture electronic radiators, electronic switches, electric wheels, and other products.
4) Industrial control field: It can be used to manufacture temperature control systems for industrial control equipment.
In conclusion, the application field of temperature control nitinol spring is very wide and can play an important role in various industrial fields as well as medical and electronic fields.
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