HIGH-STRENGTH HIGH-CONDUCTIVITY COPPER ALLOY WIRE ROD OF EXCELLENT RESISTANCE TO STRESS RELAXATION CHARACTERISTICS

摘要

A high-strength high-conductivity copper alloy wire rod of excellent resistance to stress relaxation characteristics, the copper alloy wire rod comprising 1.0 to 4.5 mass% of Ni, 0.2 to 1.1 mass% of Si, 0.05 to 1.5 mass% of Sn, less than 0.005 mass% (including zero) of S and the remainder consisting of Cu and unavoidable impurities, which exhibits a conductivity of 20 to 60% IACS and a tensile strength of 700 to 1300 MPa. Also, there is provided a process for producing the same.