| 摘要 |
Provided is a copper alloy for electrical and electronic equipment, having reliable and sufficiently excellent copper alloy stress relaxation properties and having excellent strength and bending workability. Also provided are a copper alloy thin sheet for electrical and electronic equipment and a conductive component and a terminal for electrical and electronic equipment. The copper alloy for electrical and electronic equipment contains more than 2 mass% but less than 23 mass% Zn, 0.1-.0.9 mass% Sn, at least 0.05 mass% but less than 1.0 mass% Ni, at least 0.001 mass% but less than 0.10 mass% Fe, and 0.005-0.1 mass% P, with the remainder being Cu and unavoidable impurities. The copper alloy for electrical and electronic equipment fulfills, by atomic rate, 0.002≤Fe/Ni<1.5, 3<(Ni+Fe)/P<15, and 0.3<Sn/(Ni+Fe)<5. The special grain boundary length ratio (L&sgr;/L), being the ratio between the sum (L&sgr;) of each grain boundary length for &Sgr;3, &Sgr;9, &Sgr;27a, and &Sgr;27b and length (L) of all crystal grain boundaries is at least 10%. |
