A sheet material produced by welding together and rolling two or more layers of metals with different coefficients of thermal expansion.
Thermostatic bimetal is a sheet material formed by welding together and rolling two or more layers of metals with different coefficients of thermal expansion; it is primarily used in devices such as thermometers, temperature controllers, automatic regulators, switch trip units, and relay time-delay controls.
This material possesses the characteristic of bending in response to temperature changes, allowing it to be fabricated into actuating elements for temperature-indicating and automatic control instruments; available shapes include circular, rectangular, fan-shaped, and spiral forms.
