Metals 104 Polymers Ceramics Lead Density? Copper Steels Cast iron Density may be viewed as Zinc alloys the mass per unit volume. Sintered iron It governs how much the part will weigh. Alumina Aluminum tin Silicon nitride Silicon carbide Aluminum Magnesium Silicone rubber Graphite Figure 3.11 Acetal Density for various Phenol formal- dehyde metals,polymers, Nylon and ceramics at room temperature 103 Natural rubber Polyethylene (20^C;68f.[From ESDU Data Item No.84041 8×102 (1984]ME 350 6 Density2 Density may be viewed as the mass per unit volume. It governs how much the part will weigh