All Lincoln cents from 1909 to 1942 and 1944 to mid-1982 were made of bronze.
1943 cents were made of steel.
In mid-1982 the composition was changed to the current copper-plated zinc.
Modern circulation pennies are made by the US Mint in either Philadelphia or Denver. You can visit their website www.usmint.gov to learn more about the US Mint and its programs.Coins made in Denver...
US cents were struck in the following metals: Pure copper: Large cents from 1793 to 1857 88% copper, 12% nickel: small cents from 1856 to mid-1864 95% copper, 5% tin and/or zinc: mid-1864 to 1942 and...