--- In Homebrew_PCBs@yahoogroups.com, "Steve" <alienrelics@y...>
wrote:
ignoring the 1943 "wartime" steel cent, they were actually bronze
(95%copper, 5% tin and zinc) or brass (95% copper, 5% zinc)
depending on the time period - pure copper is much too soft to use
for coins.
A.J.
wrote:
> Oh, yeah, current USA "copper" pennies are copper plated zinc.And lest anyone think they were pure copper before the 1982 change,
ignoring the 1943 "wartime" steel cent, they were actually bronze
(95%copper, 5% tin and zinc) or brass (95% copper, 5% zinc)
depending on the time period - pure copper is much too soft to use
for coins.
A.J.