| 摘要 |
A copper alloy for electric and electronic instruments, containing Ni of 1 to 3 mass %, Ti of 0.2 to 1.2 mass %, any one or both of Mg and Zr of 0.02 to 0.2 mass %, and Zn of 0.1 to 1 mass %, with the balance being Cu and unavoidable impurities, in which the copper alloy contains at least one of an intermetallic compound comprising Ni, Ti and Mg, an intermetallic compound comprising Ni, Ti and Zr, or an intermetallic compound comprising Ni, Ti, Mg and Zr, and the copper alloy has a stress relaxation rate of 20% or less after holding the alloy at 150° C. for 1,000 hours; and a method of producing the copper alloy for electric and electronic instruments.
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