| 摘要 |
PROBLEM TO BE SOLVED: To provide: a copper alloy material improved in conductivity, strength and stress relaxation resistance in good balance; a method for producing a copper alloy material; a lead frame; and a connector.SOLUTION: There is provided a copper alloy material which comprises 0.2 mass% or more and 0.6% or less of iron, 0.02 mass% or more and 0.06 mass% or less of nickel, 0.07 mass% or more and 0.3 mass% or less of phosphorus, 0.01 mass% or more and 0.2 mass% or less of magnesium, 0.001 mass% or more and 0.05 mass% or less in total of one or more elements selected from tin, silver, manganese, chromium and titanium and the balance of copper and inevitable impurities and has conductivity of 70% IACS or more, a 0.2% yield strength of 500 MPa or more and a stress relaxation rate after heating at 150°C for 1000 hours of 30% or less. |
