Gunmetal, also known as red brass is a type of Bronze – an alloy of Copper, Lead, Tin and Zinc along with specified percentage of Nickel.The principal uses of this alloy are for valve bodies, pump bodies, elbows, pipes, taps and cocks and other hydraulic fittings where pressure tight properties are important. Its corrosion resistance properties rate fairly high and it also finds application in low-stressed bearings and moving parts.