I am trying to collect a wide variety of coins made of copper alloys. This has not been easy to research because the world coin guide I use does not give exact compositions, just the general name such as "Brass", "Nickel Brass", "Copper Nickel", etc. Wikipedia has been my best resource, although coin composition information there is sporadic, available mostly for the largest countries. Does anyone have a good source for this information? Does anyone have any additions for my list? There are a lot of duplicate alloys available, and I am mainly looking for one good example of each individual alloy. Here is what I have found so far (no guarantees of correctness): US Large Cents . . . . . . Cu. . . . . . . 100 Canada Cents . . . . . . . Cu. . . . . . . 95-98% (wiki: canada 1 cent coin) US Copper Cents. . . . . . CuSnZn. . . . . 95:05 US Copper Cents. . . . . . CuZn. . . . . . 95:05 Romania 2 Lei 1947 . . . . CuZi. . . . . . 92:08. . . . . 3.5 g Canada Tombac 5-Cents. . . CuZn. . . . . . 88:12 Arcade tokens. . . . . . . CuZn. . . . . . 70:30 Romania Leu 1950-1951. . . CuZn. . . . . . 70:30. . . . . 1.83 g Columbia 20 Pesos. . . . . CuZn. . . . . . 70:30. . . . . 2.0 g Japan 5 Yen. . . . . . . . CuZn. . . . . . 65:35 Romania 1 Leu 1947-48. . . CuZn. . . . . . 63:37. . . . . 2.5 g US CuNi Cents. . . . . . . CuNi. . . . . . 88:12 English 20 Pence . . . . . CuNi. . . . . . 84:16 US Nickels . . . . . . . . CuNi. . . . . . 75:25 English Pound. . . . . . . CuZnNi. . . . . 70:24.5:5.5. . 9.50 g Romanian 1 Leu 1938-41 . . CuZiNi. . . . . 80:19:01 . . . 2.75 g English 3 Pence. . . . . . CuZnNi. . . . . 79:20:01 . . . 9.8 g Irish 20 Pence . . . . . . CuZnNi. . . . . 79:20:01 . . . 8.5 g EU 1, 2 ("gold" part). . . CuZnNi. . . . . 75:20:05 Colombia 200 pesos . . . . CuZnNi. . . . . 65:20:15 . . . 7.08 g Mexico 20/50 Cents . . . . CuAlNi. . . . . 92:06:02 Australia Dollar . . . . . CuAlNi. . . . . 92:06:02 . . . 9.00 g France 10 Francs 74-87 . . CuAlNi. . . . . 92:02:06(?). .10.00 g Euro 10/20/50 Cents. . . . CuAlZnSn. . . . 89:05:05:01 US Pres Dollar (outer) . . CuZnMnNi. . . . 77:12:07:04 Canada 5-cent. . . . . . . Ni. . . . . . . 100
