Patent ID: 8211249

Claim:
A manufacturing method for a copper base rolled alloy comprising: a rolling step of rolling an alloy cast body having a copper base alloy composition containing 0.05 percent by mass or more, and 10 percent by mass or less of at least one element selected from Be, Mg, Al, Si, P, Ti, Cr, Mn, Fe, Co, Ni, Zr and Sn, and not containing P at a concentration more than or equal to the concentration of incidental impurities with shear deformation in such a way that a <111>//ND texture is provided; a solution treatment step of converting a workpiece, which has been subjected to the rolling step, to a solid solution at 700° C. or higher, and 1,000° C. or lower, and a measuring step of measuring a rolled surface of the copper base rolled alloy using X-ray diffraction, wherein an X-ray diffraction intensity ratio I(111)/I(200) of the rolled surface of the copper base rolled alloy is 2.0 or more.