Material comparison

The table values below are for commercially pure metals.

	Al	Fe	Cu	Zn	Nylon® (Polyamide 6-6)	Delrin® (Polyacetal)
Density, g/cm3	2.7	7.9	8.9	7.1	1.1	1.4
Melting point, °C	658	1540	1083	419	255	175
Thermal capacity, J/kg, °C	900	450	390	390	1680	1470
Thermal conductivity, W/m,°C	230	75	390	110	0.23	0.23
Coeff. of linear expansion, x 10 -6 /°C	24	12	16	26	70-100	80-90
El. conductivity, % I.A.C.S. 2)	60	16	100	30	-	-
El. resistance, x 10 -9 Ωm	70	105	17	58	-	-
Modulus of elasticity, GPa	70	220	120	93	3	3

100% I.A.C.S. (International Annealed Copper Standard) is the conductivity that, at 20°C, corresponds to 58 m/Ω, mm².