Abstract: A phosphor bronze strip having excellent bending workability and high mechanical strength for use in electronic parts such as terminal connectors wherein;

Abstract: The present invention relates to a high-strength copper alloy used for electronic parts such as terminals and connectors, and more particularly, to a high-strength phosphor bronze strip. The present invention provides a phosphor bronze strip with excellent punching formability characterized in that a total content of S (20 to 100 ppm), Mn, Ca, Mg and Al is 50 ppm or less, a phosphor bronze strip with excellent punching formability characterized in that the sum total of lengths of etching imprints is 5 mm/mm2 or more when a cross-section parallel to the rolling direction is etched, a phosphor bronze strip with excellent punching formability characterized in that a copper sulfide phase exists in a range of 1 to 3% of the microstructure whose cross-section is parallel to the rolling direction and a phosphor bronze strip characterized in that the plastic deformation ratio when subjected to a shearing test with clearance of 4 to 10% is 50% or less.