Reciprocal of temperature coefficient of conductor material

Reciprocal of temperature coefficient of resistance at 0 $^{\circ}$C of the conductor material.

Symbol
$\beta_{c}$
Unit
K
Formulae
$-20 + \frac{1}{\alpha_{c}}$
Choices
MaterialValue
Cu234.5
Al230.3
AL3250.0
Brz313.3
CuZn506.3
Ni140.5
SS980.0