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Phosphor Bronze
A bronze, composed of about 80 % copper, 10 % tin, 9 % antimony, and 1 % phosphorus, having great hardness and resistance to corrosion, melting point 1562 Fahrenheit
Brass
Brass is yellow metal that appears a pale straw yellow colour when polished. It is an alloy of copper and Zinc making it harder than either of its components. Brass is malleable, machineable and resists corrosion. Brass is 60% copper, 40% zinc. It is a metal that lends itself well to turning, spinning or machining and casts very well, its melting point 1652-1724 Fahrenheit
Aluminium
A silvery-white, ductile metallic element, the most abundant in the earth's crust but found only in combination, chiefly in bauxite. Having good conductive and thermal properties, it is used to form many hard, light, corrosion-resistant alloys, melting point 1218 Fahrenheit
Gunmetal
A 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.