Prestessed concrete steel strand 1. Product: Prestressed concrete steel strand 2. Specification: 1x7-15.20mm, 1x7-15.24mm,etc. Prestessed concrete steel strand 1. Product: Prestressed concrete steel strand 2. Specification: 1x7-15.20mm, 1x7-15.24mm, 1x7-12.70mm; 1x7-15.20mm; 1x7-17.80mm 3. Standard: ASTM, GB, AISI, JIS, DIN, BS 4. Tensile strength: 1860-1920Mpa 5. Elongation(Lo not less than ...