ブロンジタル

Bronzital is an Italian name for an aluminium bronze used in coinage: a copper-based alloy with aluminium and, in its later formulation, a small proportion of nickel added to improve brightness and reduce oxidation. Its exact composition can vary, but a recent formulation is 92% copper, 6% aluminium, and 2% nickel. Bronzital has a golden appearance, good wear resistance, and good corrosion resistance, making it suitable for circulating coins.