What are the operating ambient temperatures?
Flexinol® is quite frequently used in devices that are rated for – 40°C and below. The maximum operating temperature however is limited. This is due to the temperature hysteresis between the heating and cooling cycles. The return (cooling) transition temperature is approximately 25-30 °C below the contracting (heating) transition temperature. For example, a 90 °C material will not return to its oiginal length until around 60 °C. Since the transition temperatures are dependent on stress, the actual operating limits are device specific and it is possible to reach an operating ambient above 80°C with state of the art designs. In addition, there are new alloys under development for higher ambient temperature operations up to 300 °C. Please contact your sales representative for more information.
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