Helix PC Steel wire: 1.Size: 3.0-9.0mm 2.Standard:ASTM, GB, ... , indented, plane Name Dia. Tensile Strength Standard Helix PC Steel wire 3.0mm - 9.0mm1470Mpa-1860MpaGB5223, AS1310, ASTM , BS 1. Type ... used for prestressed and post-tensioning tech-nology in big medium and small szied of various shapes of pc structures, and ... standard, tensile strength, quantity and packing requirement. Helix PC steel wire