Copper alloys

Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals (such as phosphorus) or metalloids (such as arsenic or silicon). These additions produce a range of alloys some of which are harder than copper alone or have other useful properties, such as strength, ductility, or machinability.

thumb|Islamic Golden Age brass [[astrolabe]] thumb|upright|Brass lectern with an eagle, attributed to [[Aert van Tricht, Limburg (Netherlands), circa 1500]]

shiny alloy of copper, nickel, and zinc

thumb|Natural electrum "wires" on quartz, historic specimen from the old Smuggler-Union Mine, Telluride, Colorado, USA thumb|The Pactolus river, from which [[Lydia obtained electrum for its early coinage]] thumb|Electrum Phoenician metal bowls|Phoenician bowl with mythological scenes, a sphinx frieze and the repre­sentation of a king vanquishing his enemies, Cypro-Archaic I, from [[Idalion, 8th–7th centuries BC (Louvre, Paris)]] thumb|Brooch with a griffin protome, from the necropolis of [[Kameiros, Rhodes, (Louvre)]]

thumb|Two stacks of Half dollar (United States coin)|Half dollars. The coins in the stack on the right are composed of copper with cupronickel cladding, and can be distinguished from the [[silver half dollars on the left by their visible copper cores.]] Cupronickel or copper–nickel (CuNi) is an alloy of copper with nickel, usually along with small quantities of other metals added for strength, such as iron and manganese. The copper content typically varies from 60 to 90 percent. (Monel is a nickel–copper alloy that contains a minimum of 52 percent nickel.)

copper alloy used in many coins

alloys used for the bearing surface in a plain bearing

Constantan refers to a copper-nickel alloy commonly used for its stable electrical resistance across a wide range of temperatures. Alternatively it is known in various contexts as Eureka, Advance, or Ferry. It usually consists of 55% copper and 45% nickel. Its main feature is the low thermal variation of its resistivity, which is constant over a wide range of temperatures. Other alloys with similarly low temperature coefficients are known, such as manganin (Cu [86%] / Mn [12%] / Ni [2%] ).

thumb|The Art Deco gate in the entrance hall of Detroit's [[Guardian Building is made from Monel.]]

thumbnail|Ottoman tombac ewer and basin set – 1870 – Collection of Turkish and Islamic Arts Museum – Brought to museum in 1926 from the tomb of [[Sultana Pertevniyal]]

thumb|right|300px|Diptych with Nativity and Adoration, silver and niello, [[gilt-bronze frame, Paris, , The Cloisters]] thumb|Byzantine gold ring with niello inscription: "Lord help Leontius, Patrician and Count of imperial Obsikion guarded by God", Niello is a black mixture, usually of sulphur, copper, silver, and lead, used as an inlay on engraved or etched metal, especially silver. It is added as a powder or paste, then fired until it melts or at least softens, and flows or is pushed into engraved lines in the metal. It hardens and blackens when cool, and the niello on the flat surface is

thumb|Funeral mask in Tumbaga - Lambayeque culture Musée des Amériques

Manganin is a trademarked name for an alloy of typically 84.2% copper, 12.1% manganese, and 3.7% nickel. It was first developed by Edward Weston in 1892, improving upon his Constantan (1887).

copper alloy

also called Britannia ware, a type of pewter alloy

alloy of aluminium, copper and zinc

Bronze where the oxygen is removed with phosphorus

metal alloy with copper as its principal component

alloy

metal alloy

metal alloy

thumb|A murti statuette of [[Vishnu made from Panchaloha]] Panchaloha (), also called Pañcadhātu (), is a term for traditional five-metal alloys of sacred significance, used for making Hindu temple murti and jewellery.

Cunife is an alloy of copper (Cu), nickel (Ni), iron (Fe), and in some cases cobalt (Co). The alloy has the same linear coefficient of expansion as certain types of glass, and thus makes an ideal material for the lead out wires in light bulbs and thermionic valves. Fernico exhibits a similar property. It is a magnetic alloy and can be used for making magnets.

Bronze alloy

thumb|A USB flash drive with a Liquidmetal case.

highly valuable metal alloy in classical antiquity

metal alloy

thumb | right | Bowl made of Corinthium Bronze Hepatizon (Greek etymology: , English translation: "liver"), also known as black Corinthian bronze, was a highly valuable metal alloy in classical antiquity. It is thought to be an alloy of copper with the addition of a small proportion of gold and silver (perhaps as little as 8% of each), mixed and treated to produce a material with a dark purplish patina, similar to the colour of liver. It is referred to in various ancient texts, but few known examples of hepatizon exist today.

type of brass

Glucydur is the trade name of a metal alloy with a low coefficient of thermal expansion, used for making balance wheels and other parts of mechanical watches.

alloy of copper containing arsenic

brass comprising 95% copper and 5% zinc