metallic composite testing
Dewlynn59
Posts: 106 ✭
A 1919 bronze I'm penny is 95%Cu. 4%Sn. 1%Zn. This is the true metallic composite. Weight 9.4gm. PCGS performed a metallic composite of the same coin, it was 95.6%Cu.3.3%Sn. and 1.2% Zn.
Conclusion: the Copper content is off by .6%, the Sn is off by0.00132% and the Zn is off by-2.3%. And the weight 9.54gm. How rare is this coin?
This 1933 uk. King George v. Pattern coin.
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That is the only one I have seen.... Of course, there could be millions more that have not been subjected to a composite analysis.... Cheers, RickO
https://forums.collectors.com/discussion/1040479/how-rare-is-a-1919-uk-one-penny-made-with-copper/p1
In honor of the memory of Cpl. Michael E. Thompson
the composition is within normal tolerances
9.4 and 9.54 grams is WAY off.
should you come across brass, that is also mostly copper and some zinc
Very common. The differences are so small that they don't make a difference.
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I believe you already posted this coin a few months ago and argued that it was made from 95% copper instead of bronze.
You have a normal UK penny. Accept it.
More testing needed
This 1933 uk. King George v. Pattern coin.
no. none. not at all.
That may well be the case, but not as far as the coin is concerned....
On your original thread, why did you ever question the alloy of an obviously normal coin, why did you refuse to understand direct and repeated explanations of how alloys work, and why do you continue to pursue the issue even after wasting the money to have a normal coin tested and slabbed as what it is - a normal coin worth less than a dollar?