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Islamic Golden Age brass astrolabe Brass lectern with an eagle. Attributed to Aert van Tricht, Limburg (Netherlands), c. 1500.. Brass is an alloy of copper and zinc, in proportions which can be varied to achieve different colours and mechanical, electrical, acoustic and chemical properties, [1] but copper typically has the larger proportion, generally 2 ⁄ 3 copper and 1 ⁄ 3 zinc.
Copper alloys are metal alloys that have copper as their principal component. They have high resistance against corrosion. Of the large number of different types, the best known traditional types are bronze, where tin is a significant addition, and brass, using zinc instead. Both of these are imprecise terms.
Gun metal, also known as red brass in the United States, is a type of bronze – an alloy of copper, tin, and zinc. Proportions vary but 88% copper, 8–10% tin, and 2–4% zinc is an approximation. Originally used chiefly for making guns, it has largely been replaced by steel for that purpose.
Brass see also Brass §Brass types for longer list. Calamine brass ; Chinese silver ; Dutch metal ; Gilding metal ; Muntz metal ; Pinchbeck ; Prince's metal ; Tombac ; Bronze (tin, aluminum or other element) Aluminium bronze ; Arsenical bronze (arsenic, tin) Bell metal ; Bismuth bronze
Gilding metal is used for various purposes, including the jackets of bullets, driving bands on some artillery shells, [3] as well as enameled badges and other jewellery. The sheet is widely used for craft metalworking by hammer working. [1] It is also used particularly as a lower-cost training material for silversmiths.
Muntz metal (also known as yellow metal [1]) is an alpha-beta brass alloy composed of approximately 60% copper, 40% zinc and a trace of iron. It is named after George Fredrick Muntz , a metal-roller of Birmingham , England , who commercialised the alloy following his patent of 1832.
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