Copper alloy for electronic equipment, method for producing copper alloy for electronic equipment, rolled copper alloy material for electronic equipment, and part for electronic equipment
This copper alloy for electronic devices includes Mg at a content of 3.3 at % or more and 6.9 at % or less, with a remainder substantially being Cu and unavoidable impurities. When a concentration of Mg is given as X at %, an electrical conductivity σ (% IACS) is in a range of σ≦{1.7241/(−0.0347×X2+0.6569×X+1.7)}×100, and a stress relaxation rate at 150° C. after 1,000 hours is in a range of 50% or less.
