Nitinol Actuator Wire

Flexinol® Wire

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Nitinol Wire

We offer Flexinol® wire, which is a trademark for trained nitinol actuator wire in a variety of diameters, from .002 to .015. Flexinol® wire is also is available cut to length and precrimped, see below. We offer low temperture (LT) activation (contraction) 70 centigrade and high temperature (HT) activation (contraction)90 centigrade, wires.


Flexinol® is a shape memory alloy (nitinol) actuator wires. Made of nickel-titanium (Nitinol) these small diameter wires contract (typically 2% to 5% of their length) like muscles when electrically driven or heated. This ability to flex or shorten is a characteristic of certain alloys which, dynamically change their internal structure at certain temperatures.


Flexinol® Wire properties
To activate Flexinol® wire it is heated above its transition temperature (typically 70°C). An electric current may be passed through the wire to heat it electrically. The contraction movement may be applied to any task requiring physical movement with low to moderate cycling speeds. The small size, light weight, ease of use and silent operation allow it to replace small motors or solenoids.
When the material cools (or when it is allowed to cool) it can be stretched back it its original length for subsequent contractions.


Diameter Size (Inches) Resistance (Ohms/Inch) Maximum Pull Force (grams) Approximate* Current at Room Temperature (mA) Contraction* Time (seconds) Off Time 70° C LT Wire** (seconds) Off Time 90° C HT Wire** (seconds)
0.003 5.0 80 100 1 0.5 0.2
0.004 3.0 150 180 1 0.8 0.4
0.005 1.8 230 250 1 1.6 0.9
0.006 1.3 330 400 1 2.0 1.2
0.008 0.8 590 610 1 3.5 2.2
0.010 0.5 930 1000 1 5.5 3.5
0.012 0.33 1250 1750 1 8.0 6.0
0.015 0.2 2000 2750 1 13.0 10.0

*Please note contraction time is directly related to electric current imposed. The guidelines are only approximations, since other factors like ambient temperature, air currents, and heat sinking will vary with specific devices.

** Approximate Cooling Time


Flexinol® Wire Price List (cost per foot)

Item # Metric Item # Standard Unit Price
Flexinol® 075 HT/LT Flexinol® 0.003 $2.50 / ft
Flexinol® 100 HT/LT Flexinol® 0.004 $2.50 / ft
Flexinol® 125 HT/LT Flexinol® 0.005 $2.50 / ft
Flexinol® 150 HT/LT Flexinol® 0.006 $2.50 / ft
Flexinol® 200 HT/LT Flexinol® 0.008 $2.50 / ft
Flexinol® 250 HT/LT Flexinol® 0.010 $2.50 / ft
Flexinol® 300 HT/LT Flexinol® 0.012 $5.00 / ft
Flexinol® 375 HT/LT Flexinol® 0.015 $8.50 / ft


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