Cold drawn (cold drawn) prestressing steel wire of high carbon steel wire rod (high carbon wire rod) after cold drawing surface treatment from the carbon content of the steel is in the range 0.6-0.9 choice to go through before cold drawn acid Wash phosphate or other forms of surface treatment, after cold drawn to reduce the cross sectional area typically 50-85%, increase strength through work hardening principle. Cold drawn prestressing wires such as re-stabilized process (Stabilizing), has become the low relaxation (low relaxation) prestressing wires, to obtain a low relaxation properties, and significantly improve the yield strength, elongation, and straight sex. If it becomes galvanized prestressed galvanized steel wire, galvanized steel wire after stabilizing treatment called low relaxation of prestressed galvanized steel wire. General press of a coil wire (coil) delivery sleepers (railway sleeper) when applied, can be cut to length bundles delivered as needed. Prestressed steel wire having a diameter generally in the range of 4-12 mm, 5 mm and China's 7 mm common specifications. High strength of this material is mainly manifested in the axial direction, radial significantly lower. When heated to 400 degrees or higher, relaxation properties and strength properties will be significant damage. Cold-drawn prestressing wires when applied to the pipe, it should pay attention to check its resistance to stress corrosion. When using galvanized steel, not entirely trust its corrosion resistance, the entire cable system should other protective measures.