| 摘要 |
PROBLEM TO BE SOLVED: To provide a Cu-Ni-Si alloy for an electronic material in which high strength and high electrical conductivity are made compatible. SOLUTION: In the Cu-Ni-Si alloy having a composition comprising, by mass, 1.0 to 4.5% Ni and 0.25 to 1.5% Si, and the balance Cu with inevitable impurities, provided that each mass concentration of Ni and Si is defined as [Ni] and [Si], the mass concentration ratio between Ni and Si, [Ni]/[Si] is 4 to 6, and also,χdefined by formula (1) is 0.1 to 0.45: ([Ni]-4χ)<SP>2</SP>([Si]-χ)=1/8 (formula 1). COPYRIGHT: (C)2005,JPO&NCIPI
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