... Tianjin DaQiang 1. ASTMA421 , BS5896 , 2. Strength : 1470 --1770 Mpa 9mm spiral pc wire from Tianjin DaQiang Specification 1. Standard : ASTMA421 ... , 1570Mpa , 1670Mpa , 1770Mpa 3. Diameter : 4mm , 4.8mm , 5mm , 7mm , 9mm ASTM A416GradeNominal Dia (mm)Tolerance(mm)Nominal Section Area(mm2 ...