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In Reply to: RE: LOL !!!!! posted by djk on June 28, 2015 at 20:50:08
but pre 64 were pretty much homogeneous mixes of the alloy metals. The newer ones have distinct layers.
makes a difference in resonance control
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The current clad version is two layers of cupronickel, 75% copper and 25% nickel, on a core of pure copper. The total composition of the coin is 8.33% nickel, with the remainder copper.
They make the blank planchets locally here at PMX Industries.
The $1 coins are Manganese-Brass 88.5% Cu, 6% Zn, 3.5% Mn, 2% Ni .
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