Prestressed steel strands are stranded steel cables consisting of 2, 3, 7 or 19 high-strength steel wires, and treated for stress relief (stabilization), suitable for prestressed concrete or similar applications. The main features of prestressed steel strands are high strength and good relaxation properties, and they are relatively straight when unfolded. A common tensile strength rating is 1860 MPa.

According to the number of steel wires in one strand: 2 wires, 3 wires, 7 wires and 19 wires

According to the surface morphology, it can be divided into: smooth steel strand, scored steel strand, die-drawn steel strand (compact), epoxy resin-coated steel strand, etc.

It can also be sorted by diameter, or strength class, or standard.

High carbon steel wire rod is used, which is cold drawn into steel wire after surface treatment, and then a certain amount of steel wire is twisted into strands according to the steel strand structure, and then undergoes a stress-relieving stabilization process. In order to prolong the durability, the steel wire can have metal or non-metal plating or coating, such as galvanizing, epoxy coating, etc. In order to increase the grip with the concrete, the surface can be scored, etc. The die-drawn prestressed steel strand undergoes a die compression process after twisting, the structure is more compact, and the surface layer is more suitable for anchorage to grasp. To make unbonded prestressed steel strands, ordinary prestressed steel strands are used, coated with anti-corrosion grease or paraffin, and then wrapped with high-density polyethylene (HDPE).

Shandong Bangyi Metal products Co.,Ltd mainly produces steel strands for prestressed concrete with 1X7 structure and 1X19 structure; steel wire for prestressed concrete; various specifications of unbonded steel strands, etc.

Main Specifications:

1×7 9.53mm 11.11mm 12.70mm 15.24mm 17.80mm 21.60mm

1×19 17.80mm 19.30mm 20.30mm 21.80mm 22.00mm 28.60mm

Executive standards: National Standard GB/T 5224, American Standard ASTM A416, British Standard BS 5896, European Standard EN10138 and Japanese Standard JIS G3536, Australian Standard AS/NZS 4672, Brazilian Standard NBR-7483

Common uses of prestressed steel strands: subway bridges, commercial high-rise buildings, geotechnical reinforcement, foundation pit support, multi-storey car parks, stadiums, airports, silos, railway sleepers, highway and railway viaducts, suspension bridges . Steel strand products are used in post-tensioned prestressed concrete structures, coal mine support, water conservancy dams, high-rise buildings, highways, railways, long-span viaducts, foundation pit support, tunnels and other concrete infrastructure projects. Production of supporting auxiliary materials for prestressed steel strands: anchors, spacers, expansion rings, wire rings, anchor cable guide caps, prestressed metal bellows, prestressed plastic bellows and other peripheral products.

Prestressed strands are widely used in bridge construction strands, highway strands, railway strands, subway strands, high-rise building strands, industrial plant strands, stadiums, large Steel strands for facilities, steel strands for geotechnical anchoring, steel strands for slope protection, steel strands for coal mine support furnaces, steel strands for hydropower stations, steel strands for thermal power plants, steel strands for sewage treatment plants, Steel strands for water conservancy projects, long-span steel strands, cast-in-place floor slabs for large bay buildings, large-load prefabricated beams, large-load prefabricated structures, etc.