Copper alloy sheet material and method of producing the same

A copper alloy sheet material, having an alloy composition containing any one or two of Ni and Co 0.5 to 5.0 mass % in total, Si 0.1 to 1.5 mass %, and optionally at least one selected from the group consisting of Sn, Zn, Ag, Mn, B, P, Mg, Cr, Fe, Ti, Zr, and Hf 0.005 to 2.0 mass % in total, with the balance being copper and unavoidable impurities,

• having an R value of 1 or greater, which is defined by:
• R=([BR]+[RDW]+[W])/([C]+[S]+[B])
• wherein [BR], [RDW], [W], [C], [S], and [B] represent an area ratio of crystal texture orientation component of BR orientation {3 6 2}<8 5 3>, RD-rotated-cube orientation {0 1 2}<1 0 0>, cube orientation {1 0 0}<0 0 1>, copper orientation {1 2 1}<1 1 1>, S-orientation {2 3 1}<3 4 6>, and brass orientation {1 1 0}<1 1 2>, respectively, in crystal orientation analysis in an EBSD (electron back scatter diffraction) analysis, and having a proof stress of 500 MPa or greater, and an electrical conductivity of 30%IACS or higher.