Coated Steel 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. Our company can produce various models according to different standards of products, specifications are as follows: Diameter: 9.3mm, 9.53mm, 11.1mm, 12.5mm, 12.7mm, 12.9mm, 15.2mm, 15.7mm, 17.8mm, 18.9mm, 21.6mm, 21.8mm A. Steel Strand for PC Concrete PC strand (1)Steel Strand for PC Concrete PC strand Standard GB/T5224 pc strand: 1Ã?7-9.5mm 11.1mm 12.7mm 15.2mm 15.7mm 17.8mm 21.6mm, Standard ASTM416 PC strand 1Ã?7-7.9mm 9.53mm 11.11mm 12.7mm 13.2mm 14.29mm 15.24mm 17.8mm, Standard BS 5896 pc strand 1Ã?7-8.0mm 9.3mm 9.6mm 11.0mm 12.5mm 12.9mm 15.2mm 15.7mm,