Copper was a relatively cheap metal to make low denomination coins from, but due to inflation and the rising price of copper, it became less economical to continue making one and two cent coins.
The Australian five-cent coin is composed of 75% copper and 25% nickel. Both of these metals are comparitively good electrical conductors. Copper, in particular, is the second best, after silver.
Australian silver coins (5, 10, 20 and 50 cent) are composed of 75% copper and 25% nickel. There is no silver in any circulating Australian coin.
Yes. The Australian general circulation 5, 10, 20 and 50 cent coins are all made from a 75% copper and 25% nickel alloy. The Australian general circulation 1 and 2 Dollar coins are all made from a 92% copper, 6% aluminum and 2% nickel alloy.
The were no British or Australian coins made from pure copper in 1915. Pennies, Halfpennies and Farthings were made from bronze which was about 97% copper.
Authentic coins were made of copper. Many replicas and fake coins made from "base metal" exist.
Australian 2 cent coins were issued from 1966 until 1984 and were made from 97% copper, 2.5% zinc and 0.5% nickel. No general circulation Australian 2 cent coin contained any silver. If you have a silver Australian 2 cent coin, it is because somebody plated it. In 2006, the Royal Australian Mint (RAM) issued a pure gold and a pure silver set of coins, including the 2 cent coin, to commemorate the 40th Anniversary of the Decimal Currency in Australia. The coins were never issued individually.
Only the coins date 1982 or before, 1983 to date are Zinc with a copper plating.
Very little. US one cent coins are made of zinc with a thin copper coating.
Australian 2 cent coins were made from bronze. If you have silver 2 cent coins it would be because somebody plated them. They are no longer in circulation, but unless they are part of a proof set, they are worth 2 cents.
The alloy of Australia's circulating decimal "silver" coins (the 5¢, 10¢, 20¢ and 50¢) is actually 75% copper and 25% nickel.
The original 1966 was round and had an 80% silver content with 20% copper. All subsequent 50 cent coins were 12 sided and had no silver in them at all. They are made from 75% copper and 25% nickel. Other than the 1966 coin, all Australian 50 cent coins are potentially still in circulation so, unless they are part of a proof set or are uncirculated and in absolute mint condition, they are worth 50 cents.
91.67% is composed of Copper and the other 8.33% is Nickel.