Because the price of copper is more than a penny is worth.
Small 1-cent coins (1856-present) have never been made of pure copper. Their highest ever copper content was 95% copper, mixed with tin and/or zinc.
The only US cents ever made from pure copper were Large Cents made up to 1857.
Pennies do not rust because they are made of copper-plated zinc. However, the copper plating can react with certain acids and chemicals, causing them to tarnish or develop a patina over time. This is different from rust, which is the result of iron or steel reacting with oxygen and water.
Pennies: zinc, with copper plating (not mixed together).Nickels: 75% copper and 25% nickel, alloyed togetherDimes, Quarters, and Half Dollars: Pure copper clad with the same alloy as nickels, for an overall content of 8% nickel and 92% copperDollars: Pure copper clad with manganese-brass alloy.
Copper
Copper wire is a pure substance, as it is made entirely of copper atoms.
Because you asked this in the US currency section, I guess you are really talking about the one cent piece. This is sometimes called a penny because it is roughly the same size, shape, and colour as a one new penny. This used to be made of pure copper, but is now made of copper-plated zinc, so if you file away the coating, you will see the zinc inside.
Pennies were never PURE copper. Those made before 1982 were 95% copper with 5% zinc (or zinc with tin in older ones).
The last year for 100% pure copper cents was 1857.
No, pre-1982 pennies are 95% copper and post-1982 pennies are made out of mostly zinc with a thing copper coating
Pennies were made of pure copper until 1975, because it costed more than 100 pennies just to make a penny.
The materials used to mint pennies has changed. Originally, pennies were made of almost pure copper. Today, British pennies are made of nickel/steel blanks coated in copper, and US "pennies" (actually cents) are made of zinc blanks coated in copper.
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.
U.S. cents made before mid-1982, and British pennies made before 1993, were struck in a bronze alloy that was mostly copper. Some very early cents and pennies were struck in pure copper. Modern U.S. cents are made from copper-plated zinc, and British pennies are made of copper-plated steel.
There were no 1910 steel pennies ever made. The pennies made in 1910 were made out of nearly pure copper.
-In 1943, pennies were made out of steel instead of copper. A 1943 pure copper penny is a rare mint error, and is worth lots.
From 1783-1837, a penny was pure copper. But newer pennies are made mostly of zinc.He is tottaly right
ask Barack Obama
No circulating British coin contains any silver at all.British Pennies have not been made from pure copper since 1860. From 1860 to 1991, British Pennies were made from bronze with a large percentage of copper in the alloy.From 1992 onward, all British Pennies are made from steel with a copper plating.