| 摘要 |
PURPOSE:To obtain a copper alloy excellent in machinability, corrosion resistance, workability, and mechanical strength, by specifying a composition consisting of Zn, P, Sn, Al, Pb, and Cu. CONSTITUTION:The copper alloy has a composition consisting of, by weight, 25-45% Zn, 0.005-0.10% P, 0.05-1.0% Sn, 0.05-1.0% Al, 0.5-4.0% Pb, and the balance Cu with inevitable impurities and further containing, if necessary, 0.005-2.0%, in total, of one or more kinds among 0.005-1.0% of Fe, Ni, Si, Co, Cr, Mn, Te, In, Ti, Zr, Hf, Be, Mg, Ag, Cd, and Ge and 0.005-0.1% of As, Sb, and B as auxiliaries. The above copper alloy has superior machinability and corrosion resistance and is further excellent in mechanical strength as well as in workability.
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