Download movie of Body temperature spring (1M approx)

Stretch this 50mm spring beyond its elastic limit when cold, then watch it revert when warmed up to 37°C.

G81.70 Nitinol Tension Spring - Shape Memory Alloy

Extends up to 140mm when cold, but contracts to 29mm when heated to 50°C. Use to pull weights by heat.

G81.80 Nitinol Compression Spring - Shape Memory Alloy

Compresses to 16mm when cool, but extends to 30mm when heated to 60°C. Use to push weights by applying heat.

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