Gunmetal

(not made for guns anymore)

what is gun metal made of

gun metal is a type of Bronze, an alloy of copper (88%), tin (10%), and zinc (2%)

how was gunmetal discoverd

No-one knows when the first metal was found and used. It was probably what is called native copper, which is sometimes found in large lumps on the ground. http://www.chacha.com/question/how-was-gunmetal-discovered

physical properties of gunmetal

gunmetal casts and machines well.

gunmetal is corrosion resistant to steam and salt water.

and is suitable for valves, pump parts, and steam fittings.http://www.britannica.com/technology/gunmetal

what is gunmetal used for?

gunmetal is used for valves,pump parts, and steam fittings due to its anti corrosive resistances

what chemical properties does gunmea have?

gunmetal has a anti corrosion property about it, so it is perfect to work with saltwater and steam.