Minting Question - Coin Community Forum

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Author	Replies: 4 / Views: 1,462
nod2003 Pillar of the Community United States 3294 Posts	Posted 12/15/2009 3:19 pm I remember reading somewhere (not sure now) that US cents are struck at 3000 psi. However, when we made the steel cents in 1943, they are not extremely mushy strikes, which leads me to think that they upped the pressure on those. Does anyone know what pressure was used to make the steelies? Report this Post to the Staff

SeatedNut Pillar of the Community United States 2797 Posts	Posted 12/16/2009 09:38 am nod2003, This is from Wiki describing how to I.D. copper-plated 1943 cents: - Genuine 1943 copper cents will not be attracted to a magnet. Copper-plated steel cents will exhibit a strong magnetic attraction. - Copper cents weigh 3.11 grams. Steel cents weigh just 2.7 grams. - The numeral 3 in 1943 has the same long tail as the steel cents. Alterations from later-dated copper cents will be noticeable when compared side-by-side with genuine steel cents. - The quality of the strike is exceptionally sharp, especially around the rim, because the soft copper planchets were struck with the same (higher) pressure used for the steel cents. It doesn't say how much more PSI was required for steelies, but your assumption is correct. Report this Post to the Staff
Indian1 Pillar of the Community United States 3640 Posts	Posted 12/16/2009 7:01 pm With that said, then they must of used the same pressure on the steelies. Report this Post to the Staff
ratman4762 Pillar of the Community United States 2520 Posts	Posted 12/16/2009 7:29 pm Quote: struck with the same (higher) pressure used for the steel cents. Implies Steelies were struck with higher pressure. Report this Post to the Staff
nod2003 Pillar of the Community United States 3294 Posts	Posted 12/17/2009 11:54 am Right, steel is quite a bit harder then copper, so if they did not increase the pressure, then the steelies would be weak strikes. I was hoping someone had read in a book somewhere how much the pressure was increased, but maybe the mint did not broadcast that info. Report this Post to the Staff
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