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Nitinol, also known as nitinol or NITI, is a unique shape-memory alloy. The thermoelastic martensite transformation in the material is the cause of its extraordinary properties. Niti alloys are usually made of 55 to 56 percent nickel and 44 to 45 percent titanium. Small changes in composition can significantly affect the properties of the material.
Alloy |
Chemical |
Af(fully annealed) |
Min. elongation to failure [%] |
Max. Residual |
Main Applications |
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Superelastic |
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 |
-40°C ~50°C |
10 |
0.1 |
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Body temperature |
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 |
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 |
Alloy code |
F |
G |
I |
J |
H |
Main composition |
44.0Ti |
44.0Ti |
50.0Ti |
50.0Ti |
47.0Ni |
*Active Af after |
Similar to binary |
Similar to ternary NiTi0.2Cr |
42+/-5 |
-32+/-6 |
142+/-10 |
1.Nitinol is a shape-memory alloy shape-memory alloy alloy that restores its plastic deformation to its original shape at a given temperature.
2.Ni-ti wire memory alloy wire, medical ni-ti wire ni-ti arch wire temperature-controlled ni-ti Wire, memory alloy wire, its expansion rate of more than 20% , fatigue life up to 1 × 10 to the 7th power, damping characteristics higher than ordinary springs.
3.Nickel-titanium alloy wire is a very functional material, because its corrosion resistance is better than the current medical stainless steel, so it can meet the needs of various engineering and medical applications.
4.In addition to its unique shape memory function, memory alloy wires also have excellent features such as wear resistance, corrosion resistance, high damping and superelasticity.
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