銅 (Cu): 53.5-56.5%, 鎳 (Ni): 16.5-19.5%, 錳 (Mn): ≤0.5, 鐵(Fe): ≤0.25%, 鉛 (Pb): ≤0.1%, 鋅 (Zn): 餘量

150~270

5%

540~865