... ,turned 718 1.2738 40CrMnNiMo8-6-4 P20+NiChemical Composition C Si Mn P S Cr Mo Ni Min. % 0.35 ... for thermoplastic. Physical Properties:Density : at 20°C 7,85dm3 Thermal Conductivity : at 20°C 33. 0 W/(m/k) Thermal expansion ... between : 20 °Cand…°C , 10-6mm/(mk)100°C200°C300°C400°C500°C12,813, ...