Flexinol® Wire
Nitinol Index
We offer Flexinol® wire in a variety of diameters, from .001 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 trade name for shape memory alloy 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
| 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) |
| 0.0015 | 21.0 | 17 | 30 | 1 | 0.25 | 0.09 |
| 0.002 | 12.0 | 35 | 50 | 1 | 0.3 | 0.1 |
| 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
| Item # Metric | Item # Standard | Unit Price |
| Flexinol® 25 LT | Flexinol® 0.001 | $8.50 / ft |
| Flexinol® 037 HT/LT | Flexinol® 0.0015 | $2.50 / ft |
| Flexinol® 050 HT/LT | Flexinol® 0.002 | $2.50 / ft |
| 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 |
