ASTM F2063-05 Q/XB1516 Customer specified or Industry Standard
Nitinol wire Specifications
to failure [%]
-5°C ± 5°C.
Af=33 ± 3
20 - 40
45 - 95
Nitinol wire alloy code:
Regular binary NiTi alloy code, main composition, and typical active Af temperature (per ASTM F2063-05 or GB 24627-2009)
*The real active Af temperature may varies with actual composition, thermo-mechanical history of the products.
Main composition mass%Ni
*Active Af after heat treatment, °C
Regular ternary NiTi alloy code, main composition, and typical active Af temperature
44.0Ti 55.8Ni 0.2Cr
44.0Ti 55.2Ni 0.8Cr
50.0Ti 45.0Ni 5.0Cu
50.0Ti 49.7Ni 0.3V
47.0Ni 44.0Ti 9.0Nb
*Active Af after
heat treatment, °C
Similar to binary
Nitinol D with
Similar to ternary NiTi0.2Cr
with higher strength
*The real active Af temperature may vary with actual composition, thermo-mechanical history of the product.
We manufactures different medical grades (binary NiTi code D, C, S, E and ternary NiTiV code J) of Nitinol wire products
available in either as straightened super-elastic (SE) wire or the cold worked (CW) condition wire ready for heat treatment.
Heat Treatment Status:
Medical grade Nitinol wire may be purchased in the super-elastic condition (SE) or the cold worked (CW), and after the correct
supper-elastica heater treatment will accommodate strain up to 8% without permanent kinking at body temprature.
Typical transformation temperature
The transformation temperatures and mechanical properties for typical grades of Nitinol are presented in the table below:
Ni content mass%Ni
As straightened super-elastic (SE)
Cold worked (CW)
Active Af °C
Ingot As by DSC As °C
+10 ~ +18
-30 ~ -10
orthodontic files, etc
Nitinol-D High fatiqute
+14 ~ +22
-10 ~ +10
For device require
performance at 37°C
Depand on Af
+15 ~ +28
-10 ~ +10
For device with
high fatigue file
such as implants,
stents & Shapeset
0 ~ +18
- 45 ~ - 15
such as antenna,
eyeglass frame etc.
All Mechanical Testing Conducted at
22°C +/- 2°C; Permanent Set < 0.5%
after strained to 8%; Elongation at
Break > 10%
Elongation at break > 4%
There are four commonly used types of applications for nitinol.
Free Recovery: nitinol is deformed at a low temperature, and heated to recover its original shape.
Constrained Recovery: The same, except that recovery is rigidly prevented, and thus a stress is generated.
Work Production: Here the alloy is allowed to recover, but to do so it must act against a force (thus doing work).
Superelasticity: As discussed above, here the nitinol acts as a super spring.
Nitinol is also popular in extremely resilient glasses frames. It is also used in some mechanical watch springs.
It can be used as a temperature control system; as it changes shape, it can activate a switch or a variable resistor to control the temperature.
It is used in cell-phone technology as a retractable antenna, or microphone boom, due to its highly flexible and mechanical memory nature.
It is used in some novelty products, such as self-bending spoons which can be used by amateur and stage magicians to demonstrate " psychic" powers or as a practical joke, as the spoon will bend itself when used to stir tea, coffe, or any other warm liquid.
It can also be used as wires which are used to locate and mark breast tumours so that following surgery can be more exact.
Due to the fact it can change shapes it is also used as a golf club insert.
Nickel titanium can be used to make the underwires for underwire bras
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