HIGH-STRENGTH AND HIGH-CONDUCTIVITY COPPER ALLOY, AND METHOD FOR MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide a Be-free high-strength and high-conductivity copper alloy casting having the tensile strength and elongation equivalent to those of a BeCu casting being the conventional casting, and usable for machine parts and the like of complicated shapes not possible to be machined or taking labor in working. SOLUTION: The casting contains 6.0 to 9.02 wt.% Ni, 1.4 to 2.4 wt.% Si, 0.2 to 1.3 wt.% Cr, and 0.5 to 10.0 wt.% Zn, and consists of the balance Cu exclusive of inevitable impurities, and is ≥600 MPa in tensile strength, ≥2% in elongation, ≥25 in hardness HRC or ≥250 in HBW (10/300) and ≥20% in IACS of electric conductivity. COPYRIGHT: (C)2010,JPO&INPIT