| 摘要 |
PROBLEM TO BE SOLVED: To provide a copper alloy having excellent strength, electrical conductivity, bending workability or the like as the material for a terminal, a connector, a switch or the like. SOLUTION: The copper alloy for electronic machinery and tools having excellent bending workability contains Ni 2.0 to 4.5 mass%, and Si 0.3 to 1.0 mass%, with the balance being Cu and unavoidable impurities, which satisfies the following expression: Iä311}×A/(Iä311}+Iä220}+Iä200})<1.5 wherein Iä311} represents an X-ray diffraction intensity from a ä311} plane at a sheet surface; Iä220} represents an X-ray diffraction intensity from a ä220} plane at the sheet surface; Iä200} represents an X-ray diffraction intensity from a ä200} plane at the sheet surface; and A (μm) represents a crystalline grain size. COPYRIGHT: (C)2006,JPO&NCIPI
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