Patent ID: 9653191
Date: 2017-05-16
CPC Classifications: B32B,C22C,C22F,C23C,H01B,Y10T

Claim:
1. A copper alloy for electric and electronic devices, the copper alloy comprising: 7.1 mass % to 15.0 mass % of Zn; 0.10 mass % to 0.90 mass % of Sn; 0.05 mass % to less than 1.00 mass % of Ni; 0.001 mass % to 0.053 mass % of Fe; 0.005 mass % to 0.100 mass % of P; and a remainder including Cu and unavoidable impurities, wherein a ratio Fe/Ni of a Fe content to a Ni content satisfies 0.002≦Fe/Ni<1.500 by atomic ratio, a ratio (Ni+Fe)/P of a total content (Ni+Fe) of Ni and Fe to a P content satisfies 5.5≦(Ni+Fe)/P<100.0 by atomic ratio, a ratio Sn/(Ni+Fe) of a Sn content to the total content (Ni+Fe) of Ni and Fe satisfies 0.10<Sn/(Ni+Fe)<5.00 by atomic ratio, a yield ratio YS/TS is more than 90.0% which is calculated from a tensile strength TS and a 0.2% yield strength YS when a tensile test is performed in a direction parallel to a rolling direction, and the 0.2% yield strength YS is more than or equal to 494 MPa.