Gunmetal, also called G Metal, variety of bronze, formerly used for ordnance. Modern admiralty gunmetal is composed of 88 percent copper, 10 percent tin, and 2 percent zinc and is used for gears and bearings that are to be subjected to heavy loads and low speeds. It withstands atmospheric, steam, and seawater corrosion and is suitable for valves, pump parts, and steam fittings. We are stockist it gun metal which are available in different sizes avoid grades such as leaded Gum metal ordinary own mfd. Etc.This are used for superior brass costing elbow, pipes, tapes, corks, other hydraulic fittings.