Patent ID: 8105698

Claim:
A plated steel wire for a parallel wire strand (PWS) with excellent twist properties, comprising: in terms of mass %: 0.8 to 1.1% of C, 0.8 to 1.3% of Si, 0.3 to 0.8% of Mn, 0.001 to 0.006% of N, and 0.0004 to 0.0060% of B, wherein a quantity of solid-solubilized B is at least 0.0002%, and at least one or both of 0.005 to 0.1% of Al and 0.005 to 0.1% of Ti, and, with the remainder being Fe and unavoidable impurities, wherein an area fraction of non-pearlite structures in a region from a surface layer to a depth of about 50 μm is at most 10%, an area fraction of non-pearlite structures within an entire cross-section of the steel wire is at most 5%, a surface of the steel wire is galvanized with a plating quantity that is within a range of between 300 to 500 g/m 2 , a wire diameter of said plated steel wire is within a range of 4.5 to 7.5 mm, and a tensile strength satisfies a formula: TS≧2192−61×d, wherein, TS represents tensile strength (MPa) and d represents the wire diameter in millimeters.