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Search Results - Coinage metals

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Coins are made from one or more coinage metals.

Many coinage metals are from Group 11 of the Periodic table, however there are some exceptions. Precious metals are used in bullion coins and some collectable coins. Coins not intended for circulation or for intrinsic value, have also been made experimentally using an even larger variety of metals, in technical and artistic experiments.

Coins that are intended for circulation have some special requirements based on the conditions they will encounter. For example, a coin may be in circulation for up to 30 years, and so must have excellent wear resistance and anti-corrosion properties. Achieving this goal necessitates the use of base metal alloys. Some metals like manganese have occassionaly been used in coins, but suffer from making the coins too hard to take an impression well (or metals apt to wear out stamping machines at the mint).

A common base metal alloy for everyday coinage is Cupro-Nickel (also cupronickel), with varying proportions of copper and nickel. Cupronickel has a silver color, is hard wearing and has excellent striking properties, essential for the design of the coin to be pressed accurately and quickly during manufacture.

Showing 1 to 2 of 2 Articles matching 'Coinage metals' in related articles.
Pages: 1

1. Silver Christmas Rounds - An Affordable Way To Invest In Silver
January 04, 2009

Silver Christmas rounds are a lovely type of silver coinage called bullion rounds. The term round came about because the silver was fashioned into coins and therefore was able to be stacked into rolls. This made it very convenient for the coins to be shipped and handled. You'll quite often see them referred to as silver art rounds because they can be purchased inscribed with a variety of designs ranging from Santa, christmas trees, snowman, animals, angels, and many other seasonal figures. These dated season bullion rounds are not only fun to collect but some of the older, rare dates are h... (read more)

Author: Christina Goldman

2. Use of gold in jewellery
December 11, 2007

Gold is a chemical element with the symbol Au coming from the Latin aurum, meaning shining dawn. It is a highly sought-after precious metal which, for many centuries, has been used as money, a store of value and in jewellery. The metal occurs as nuggets or grains in rocks, underground "veins" and in alluvial deposits. It is one of the coinage metals. Gold is dense, soft, shiny and the most malleable and ductile of the known metals. Pure gold has a bright yellow color traditionally considered attractive. Chemically, gold is a trivalent and univalent transition metal. Gold does not react wi... (read more)

Author: gerald online

Pages: 1


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