Area Thermal Expansion Coefficient

Area thermal expansion coefficient, abbreviated as \(\alpha_a\) (Greek symbol alpha), also known as coefficient of aerial thermal expansion, is the ratio of the change in size of a material to its change in temperature.

 

Area Thermal Expansion Coefficient FORMULA
\(\large{ \alpha_a  =  \frac { 1 }{ A } \; \frac {\Delta A } {\Delta T}   }\)
Symbol	English	Metric
\(\large{ \alpha_a }\)   (Greek symbol alpha) = area thermal expansion coefficient	\(\large{ \frac{in^2}{in^2\;F} }\)	\(\large{ \frac{mm^2}{mm^2\;C} }\)
\(\large{ A }\) = area of the object	\(\large{in^2}\)	\(\large{mm^2}\)
\(\large{ \Delta A }\) = area differential	\(\large{in^2}\)	\(\large{mm^2}\)
\(\large{ \Delta T }\) = temperature differential	\(\large{F}\)	\(\large{C}\)