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What is a nickel coin made of? A: Today, the United States nickel coin is made of a 100 percent copper center, with a surface made of 25% nickel and 75% copper. But this wasn't always the case. In the past, the nickel was called a half disme and was made from silver. Disme is pronounced the same way as the word dime.
There were some nickels made of the 75/25 in early 1942 and later in the year they changed to the 56/35/9 mixture. These were identified by the letter P, D, S over the dome on the reverse of the coin. Source(s): Redbook.