Gunmetal is a durable and corrosion-resistant copper alloy, traditionally composed of around 88% copper, 10% tin, and 2% zinc. Known for its unique dark bronze color, it has been historically used in firearms and cannons, giving it its name. Today, gunmetal is valued for its resistance to wear and ability to withstand harsh environments, making it ideal for marine applications, gears, valves, and decorative objects. Its excellent machinability and tensile strength have kept it relevant in industries requiring sturdy, corrosion-resistant materials.