* 1943 steel cents were zinc plated steel, plated BEFORE the blanks were punched out (so if you look carefully there should be a thin line of unplated steel on the edge)
* 1982 (mid year) and later Lincoln cents are copper plated zinc.
EVERY other plated coin is post mint damaged by some outside party. Ranging from school science experiments to people trying to create fabulous collectables.
The "Golden Dollars", along with all of the clad coinage (Dime, Quarter, Half, Ike and
Dollars) are made of a metal sandwich, mechanically bonded together...
Quote:The alloy composition for the
Sacagawea dollar was unveiled Oct. 6,1999, in New York City. Although golden in color, it contains no gold. Both the golden
Sacagawea dollar and silver-colored Anthony dollars are clad coins, sharing a three-layer composite construction, with a pure copper core sandwiched between and metallurgically bonded to outer layers of alloy material.
The alloy layers on each side of the pure copper core of the Anthony dollar is copper-nickel, a material composed of 75 percent copper and 25 percent nickel, the same alloy that comprises the Jefferson 5-cent coin. With the
Sacagawea dollar, the alloy layers on each side of the copper core are manganese bronze, a golden-colored alloy composed of 77 percent copper, 12 percent zinc, 7 percent manganese and 4 percent nickel.
Most of the time, clad coins are quoted as the net %, e.g. 40% silver dollars and halves.
Posted 11/16/2018 6:50 pm
