Patent ID: 8784580
Filing Date: 2014-07-22
Classification: C22C,C22F

Abstract:
1. A copper alloy sheet excellent in strength and formability for use in electrical and electronic components, the copper alloy sheet comprising, by mass, 1.5% to 4.5% of nickel (Ni) and 0.3% to 1.0% of silicon (Si), with the remainder being copper and inevitable impurities, wherein the copper alloy sheet has an average size of crystal grains of 10 μm or less, a standard deviation σ of crystal grain size satisfying the condition: 2σ<10 μm, and a number of dispersed precipitates of 500 or more per millimeter, the dispersed precipitates lying on grain boundaries and having a diameter of from 30 to 300 nm.