Patent ID: 7182823

Claim:
A wrought copper alloy consisting essentially, by weight, of: from 1% to 2.5% of nickel; from 0.5% to 2.0% of cobalt, with a total nickel plus cobalt content of from 1.7% to 4.3% and a weight percent ratio of nickel to cobalt that is from 1.01:1 to 2.6:1; from 0.5% to 1.5% of silicon with the weight ratio of (Ni+Co)/Si being between 3.5:1 and 6:1; a maximum zinc content of 0.025%; a maximum chromium content of 0.08%; a maximum tin content of 0.04%; a maximum phosphorus content of 0.04%; a maximum magnesium content of 0.04%; and the balance copper and inevitable impurities wherein said wrought copper alloy has an electrical conductivity in excess of 40% IACS, a yield strength in excess of 95 ksi, a minimum bend radius as a function of thickness, mbr/t of up to 4 t for both good way and bad way bends and an average grain size of 20 microns or less following solutionizing at 950° C.