Patent ID: 11913103
Assignee: NGK INSULATORS, LTD.
Field: nan (nan)
Classification: CPC nan | IPC C

Claim 4:
5. A copper alloy consisting of:
Ni: 10 to 15% by weight;
Sn: 5.0 to 8% by weight;
Mn: 0 to 0.5% by weight;
Zr: 0 to 0.5% by weight;
at least one selected from the group consisting of Nb, Fe, Al, Ti, B, Zn, Si, Co, P, Mg, and Bi: 0 to 0.2% by weight in total; and
the balance being Cu and inevitable impurities,
wherein, in an X-ray diffraction profile determined by an X-ray diffraction method (XRD), the copper alloy has:
(i) a peak in the vicinity of 2θ=46 to 50° baying a peat intensity of 30% or more with respect to a peak intensity in the vicinity of 2θ=84 to 88°,
(ii) a peak in the vicinity of 2θ=40 to 42° having a peak intensity of 2.0% or more with respect to a peak intensity in the vicinity of 2θ=84 to 88°, and
(iii) a peak in the vicinity of 2θ=55 to 57° had in peak intensity of 7.0% or less with respect to a peak intensity in the vicinity of 2θ=84 to 88°, and
wherein the copper alloy has a stress relaxation rate of less than 15% after loading a stress of 900 MPa at high temperature of 200° C. for 1000 hours.