Bronze is an alloy of

Workers make bronze by adding a small amount of melted tin to a larger amount of melted copper. Workers may also add other metals to the bronze to make alloys that are better for certain uses. For example, adding a little bit of lead to copper and tin makes the bronze slippery. This type of bronze is used to make machine parts that slide against each other. Bronze is an excellent material for making statues, bells, and other artistic objects. After melted bronze is poured into a mold and begins to cool, it expands. As the bronze expands, it fills in every detail of the mold. When the bronze cools further and hardens, it shrinks a little bit. This makes the final object easy to remove from the mold. Bronze also changes colors when exposed to air and water. This effect is called a patina and can be very beautiful. • The same safe and trusted content for explorers of all ages. • Accessible across all of today's devices: phones, tablets, and desktops. • Improved homework resources designed to support a variety of curriculum subjects and standards. • A new, third level of content, designed specially to meet the advanced needs of the sophisticated scholar. • And so much more! Choose a language from the menu above to view a computer-translated version of this page. Please note: Text within images is not translated, some features may not work properly after translation, and the translation may not accurately convey the intended meaning. Britannica does not review the converted tex...

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/brɒnz/ Other forms: bronzed; bronzes; bronzing Bronze is a dull gold-colored metal that's used to make musical instruments, sculptures, and coins. If you get a bronze medal in the Olympics, you came in third place — nice job! Bronze is an alloy of copper, tin, and other metals. For a long time, pennies were made of bronze (today they use zinc). Cymbals, bells, and gongs are traditionally crafted using bronze, and you'll get tired of counting the many bronze sculptures found in most art museums. As a verb, this word is frequently used to mean "tan," so while you burn when you forget your sunblock, your cousin tends to bronze to a burnished shade of brown. This vocabulary list will take you back to the Bronze Age! Learn all about the ancient Mesopotamian civilizations that developed between the Tigris and Euphrates rivers. You'll explore the politics, religious traditions, and agricultural practices of the region, as well as the ancient writing known as cuneiform and structures like the stele and the ziggurat.

• The purity of [ citation needed] is that it be applied to alloys that have been refined to 99.9% or better purity ("3 nines fine"). There are, however, places in the world that allow the claim of 24kt. to alloys with as little as 99.0% gold ("2 nines fine" or "point nine-nine fine). [ citation needed] An alloy which is 14 parts gold to 10 parts alloy is 14 karat gold, 18 parts gold to 6 parts alloy is 18 karat, etc. This is becoming more commonly [ citation needed] and more precisely expressed as a decimal fraction, i.e.: 14/24 equals .585 (rounded off), and 18/24 is .750 ("seven-fifty fine"). There are hundreds of possible alloys and mixtures possible, but in general the addition of silver will color gold green, and the addition of copper will color it red. A mix of around 50/50 copper and silver gives the range of yellow gold alloys the public is accustomed to seeing in the marketplace. [ citation needed] References [ ] • Hunter, Christel (2006). Aluminum Building Wire Installation and Terminations, IAEI News, January–February 2006. Richardson, TX: International Association of Electrical Inspectors. • Hausner(1965) Beryllium its Metallurgy and Properties, University of California Press • . Retrieved October 4, 2016. • Donald E. Kirby, D. A. O'Keefe, Thomas A. Sullivan(1972) •

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Many fusible alloys are formulated to melt at 90–100° C (194–212° F); for example, Darcet’s alloy (50 parts bismuth, 25 lead, 25 tin) melts at 98° C. By replacing half the tin in Darcet’s alloy with Wood’s metal, which melts at 70° C, is obtained. See also This article was most recently revised and updated by