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Nickel is used for plating due to its high corrosion resistance, and is also used as a raw material for stainless steel and coins. The 50-yen and 100-yen coins are cupronickel coins that are an alloy of copper and nickel. The five cent coin in the United States is commonly known as “nickel.” Pure nickel was also used as a material for coins. Because nickel was important as a raw material for cupronickel, which is a material for special steel and shells, it was stockpiled by the government and used as a coin.
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