Are Canadian or Australian pennies even copper? U.S. pennies have been copper plating over a zinc core since 1982. The last 100% copper U.S. pennies were minted in 1857googe wrote:I walk around bare foot to belly![]()
. It's a copper plate rock, thought about using a coin when I was doing it, don't have any Pennies here, a 5c coin is nearly the right size though.
U.S. penny composition over the years:
1793–1796 100% copper
1796–1857 100% copper
1856–1864 88% copper, 12% nickel (also known as NS-12)
1864–1942 "bronze" (95% copper, 5% tin and zinc)
1943 zinc-coated steel (also known as 1943 steel cent)
1944–1946 "brass" (95% copper, 5% zinc)
1946–1962 "bronze" (95% copper, 5% tin and zinc)
1962–1981 "brass" (95% copper, 5% zinc)
1982 varies: "brass" (95% copper, 5% zinc) or copper-plated zinc (97.5% zinc, 2.5% copper)
1983–present 97.5% zinc, 2.5% copper (core: 99.2% zinc, 0.8% copper; plating: pure copper)
Are you gonna make 180-hole perferated plates with a .005" diameter drill bit?!

