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Galvanized steel wire for overhead stranded wire
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Intensity level | Nominal diameter mm | tensile strength, not less than MPa | Stress at 1% elongation, not less than MPa | Elongation after breaking % | Torsion test times/360º not less than | Diameter of winding test mandrel (multiple) |
（A） Normal intensity | >1.24-2.25 >2.25-2.75 >2.75-3.00 >3.00-3.50 >3.50-4.25 >4.25-4.75 >4.75-5.50 | 1340 1310 1310 1290 1290 1290 1290 | 1170 1140 1140 1100 1100 1100 1100 | 3.0 3.0 3.5 3.5 4.0 4.0 4.0 | 18 16 16 14 12 12 12 | 1D 1D 1D 1D 1D 1D 1D |
（A） High strength | >1.24-2.25 >2.25-2.75 >2.75-3.00 >3.00-3.50 >3.50-4.25 >4.25-4.75 | 1450 1410 1410 1410 1380 1380 | 1310 1280 1280 1240 1170 1170 | 2.5 2.5 3.0 3.0 3.0 3.0 | 16 16 16 14 12 12 | 3D 3D 4D 4D 4D 4D |
（A） Extra high strength | >1.24-2.25 >2.25-2.75 >2.75-3.00 >3.00-3.50 >3.50-4.25 >4.25-4.75 | 1620 1590 1590 1550 1520 1520 | 1450 1410 1410 1380 1340 1340 | 2.0 2.0 2.5 2.5 2.5 2.5 | 14 14 12 12 10 10 | 4D 4D 5D 5D 5D 5D |