Linear thermal expansion coefficient duct material

When an object is heated or cooled, its length change by an amount proportional to the original length and the change in temperature.

The values were taken or derived from, whereby the values typically are given in unit m$^{-6}$/(m.K):

Note: Greek letter $\chi$ is used because $\alpha$ was in use.

Symbol
$\chi_d$
Unit
1/K
Choices
MaterialValueRangeReference
PE0.0002engineeringtoolbox
PP9e-05engineeringtoolbox
PVC0.00011engineeringtoolbox
WPE0.0002assuming same as PE
Metal1.73e-051.08e-5-1.73e-5cast iron to stainless steel
Fibre2.16e-05typical for glass-reinforced plastic (GRP) pipe
Earth5e-06typical for vitrified clay pipe (VCP)
Cem0.000145concrete