COPPER ALLOY MATERIAL FOR ELECTRIC AND ELECTRONIC APPARATUSES, AND ELECTRIC AND ELECTRONIC COMPONENTS

摘要

A copper alloy material for an electrical/electronic equipment, containing Ni not less than 2.0 mass% and less than 3.3 mass%, having a content of Si within the range of 2.8 to 3.8 in terms of a mass ratio of Ni and Si (Ni/Si), and containing Mg 0.01 to 0.2 mass%, Sn 0.05 to 1.5 mass%, and Zn 0.2 to 1.5 mass%, with the balance of Cu and inevitable impurities, wherein when a test piece with thickness t of 0.20 mm and width w of 2.0 mm is subjected to 180°-bending with bending radius R (mm), a value of the minimum bending radius R causing no cracks is 0 mm to 0.1 mm; and, an electrical/electronic part obtained by working the same.