... 16.5 and 18.75 g/cc). Nickel, iron and copper serve as a binder matrix, which holds the brittle tungsten ... , and projectile shapes 3, High-temperature die, Electroheat , brass and copper, Tooling for low-pressure die-casting of aluminium and brass, Hot ... (between 17 and 18.6 g/cc). Nickel, iron and copper serve as a binder matrix, which holds the brittle tungsten ...