Patent ID: 10815557

Abstract:
A copper alloy sheet material which contains 0.5 to 2.5% by mass of Ni, 0.5 to 2.5% by mass of Co, 0.30 to 1.2% by mass of Si and 0.0 to 0.5% by mass of Cr, the balance being Cu and unavoidable impurities. The material fulfills the relationships 1.0≤I {200}/I0 {200}≤5.0 and 5.0 μm≤GS≤60.0 μm, and these have the relationship (Equation 1): 5.0≤{(I {200}/I0 {200})/GS}×100≤21.0, in which the I {200} represents an X-ray diffraction intensity of a {200} crystal plane, the I0 {200} represents an X-ray diffraction intensity of a {200} crystal plane of standard pure copper powder, and the GS (μm) represents an average crystal grain size. An electrical conductivity is 43.5% to 55.0% IACS and 0.2% yield strength is 720 to 900 MPa.