Material comparison

The material comparison 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.