1x3 Prestressing Concrete Steel Strand Zinc Coating: 280--300g/mm2 structure Nominal diameter (mm) Area of Section (mm2) Tolerance (mm) Tensile Strength Grade (Mpa) Breakge Load (kN) Yielding Load (kN) Elongation Lo≥400 mm (%) Theoretical Weight per 1000 meter (kg) not less than 1x3 6.20 19.80 +0.40 -0.10 1570 1720 1860 31.1 34.1 36.8 26.4 29.0 31.3 3.5 155 6.50 21.30 +0.20 -0.10 1570 1720 1860 33.3 36.5 39.4 28.3 31.0 33.5 167 8.60 37.96 +0.40 -0.20 1370 1470 52.0 55.8 44.2 47.4 297.99 37.40 +0.30 -0.15 1470 1570 1720 1860 55.9 59.7 65.4 70.7 47.5 50.7 55.6 60.1 293.59 8.74 38.64 +0.30 -0.15 1570 60.6 51.5 303 10.75 59.29 +0.40 -0.25 1370 1470 81.16 87.16 69.05 74.09 465.42 10.80 59.30 +0.30 -0.15 1470 1570 1720 87.2 93.1 102.0 74.1 79.2 86.7 465.5 12.90 84.41 +0.45 -0.20 1370 1470 117.01 125.56 99.46 106.72 662.62 85.40 +0.30 -0.15 1470 1570 1720 126.0 134.0 146.9 107.0 114.0 124.9 670.39