Using the following data (taken from Kaye and Laby) it is possible to calculate the tempco for different materials. Aluminium is chosen here as an example:
At 20 deg C,
E=70.3*10^9 (Pa)
G=26.1*10^9 (Pa)
Tempco for E is -480 ppm/degC
Tempco for G is -520 ppm/degC
For a homogeneous isotropic...