Prestressed steel strands are made of
High Carbon Steel Wire rods. After surface treatment, they are cold-drawn into steel wires. Then, a certain number of steel wires are stranded into strands according to the steel strand structure, and then a stress-relief stabilization treatment process is used. In order to extend the durability, the
Steel Wire may have a metal or non-metal plating or coating, such as galvanization, epoxy coating, and the like. In order to increase the grip strength with concrete, the surface may have nicks and the like. The pre-stressed steel strands after die-cutting are subjected to a die compression process after stranding, the structure is more compact, and the surface is more suitable for anchors to grasp. Unbonded steel strands are made of ordinary prestressed steel strands, coated with anti-corrosive grease or paraffin, and packaged with high-density polyethylene (HDPE).
The main features are high strength and good relaxation performance, and it is more straight when deployed. Common tensile strength rating is 1860 megapascals, as well as strength levels such as 1720, 1770, 1960, 2000, 2100 megapascals.
April 25, 2022
