Bronze is a metal alloy that typically consists of 88% copper and 12% tin, though many variations can be made in the composition and ratios of other added metals. Other metals added to the alloy can include nickel, zinc, aluminum, and manganese, while non-metals are sometimes added to the alloy. These non-metals include silicon, arsenic, and phosphorous. Rotax offers alloys with copper, zinc, and tin combinations.
Bronze, as an alloy, is stronger than copper alone. It has a high level of stiffness, ductility, and machinability. As they are typically very ductile alloys, most bronzes are considerably less brittle than cast iron. Due to its flexibility and strength, and the fact that it doesn’t make a spark when struck against hard surfaces, bronze is an extremely popular choice when it comes to the manufacture of wrenches, mallets, hammers, and other durable tools.