| 摘要 |
PURPOSE:To obtain a Cu alloy having superior strength, spring characteristics and electric conductivity by adding specified amounts of Sn, P and at least one among Al, Hf, Be and Mo to Cu and making the content of O2 as an impurity as low as possible. CONSTITUTION:A Cu alloy consisting of, by weight, 0.8-4.0% Sn, 0.01-0.4% P, 0.05-1.0% one or more among Al, Hf, Be and Mo, and the balance Cu with impurities including O2 reduced to <=0.0020% is used as a material for a spring for an electric apparatus, a spring for an instrument or a spring for a switch or a connector. The Cu alloy has superior strength and spring characteristics without deteriorating the electric conductivity.
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