| 摘要 |
PROBLEM TO BE SOLVED: To provide a copper alloy for an electrical connecting device having high strength and high electroconductivity, and having excellent stress relaxation resistance, stress corrosion resistance and glow resistance. SOLUTION: A copper alloy for electrical connecting device of 600 MPa or higher tensile strength (TS), 560 MPa or higher 0.2% yield strength (YS), 40% IACS or higher electrical conductivity (EC) and 500 hr or longer breaking time exhibited in a stress corrosion cracking test (SCC) under loading of 80% of 0.2% yield strength (YS), is composed of 0.1 to 1 mass% Cr, 0.1 to 5.0 mass% Zn, 0.1 to 2.0 mass% Sn and the balance unavoidable impurities and Cu. COPYRIGHT: (C)2007,JPO&INPIT
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