PE Coating Unbonded Steel PC Strand Wire 1.high tensile strength and elongation;low relaxation value;small stress losing;excellent durable anti-fatigue performance. 2.Grade: 250K / 270K / 290K, Tensile Strength: 1770Mpa / 1860Mpa / 1960Mpa, the 1000h Relaxation is 2.0% max and the elongation is 4.0% min. 3.Categories: plain,galvanized,PE coated,epoxy resin coated, spiral ribs, indented. 1.A branch factory of Hengxing group (listed in 2007) 2.Professional on PC Steel Strand manufacturing 3.An annual output of 300,000 tons 4.BV,SGS,ISO,China national construction steel quality supervision and test center certificated 5.Cooperated with China high-speed railway