MANUFACTURE OF BERYLLIUM COPPER ALLOY AND BERYLLIUM COPPER ALLOY MANUFACTURED BY THE ABOVE METHOD

PURPOSE:To uniformize the structure in a beryllium copper alloy and to obtain a product thereof reduced in the dispersion of properties and high in reliability. CONSTITUTION:A beryllium copper alloy constituted of, by weight, 1.00 to 2.00% Be, 0.18 to 0.35% Co and the balance Cu is cast, and the cast beryllium copper alloy is rolled, is thereafter annealed at 500 to 800 deg.C for 2 to 10hr, is subsequently subjected to cold rolling at >=40% draft, is again annealed at 500 to 800 deg.C for 2 to 10hr, is thereafter subjected to cold rolling to a desired sheet thickness and is subjected to final soln. treatment, by which a beryllium copper alloy having