Here's why:
* Bimetallic strips are made from two different metals with different coefficients of thermal expansion. This means that when heated, one metal expands more than the other.
* The difference in expansion causes the strip to bend or flex, which is used to control the thermostat.
* Common metal combinations for bimetallic strips in thermostats include:
* Brass and steel
* Nickel and iron
* Invar and nickel
So, while the individual metals in a bimetallic strip used in a thermostat could be brass and steel (or other combinations), the term used to describe them together is bimetallic strip.
