ASTM A416 Grade 270 Prestressed Concrete Steel Strand 9.53mm 12.7mm 15.2mm
Diameter: 9.53mm-21.8mm · Steel Grade: SWRH 82B High Carbon Steel
Details
7 Wire Prestressed Concrete Steel Strand 1860Mpa Low Relaxation PC Strand 12.7mm ASTM A416 Grade
Prestressed steel strands are manufactured from high carbon steel wire rods through processes including acid washing, phosphating, cold drawing, twisting, and stabilization treatment. Each bundle contains 2-7 steel wires with a diameter range of 9.53mm-21.6mm.
Key Specifications
| Product Name | Prestressed Concrete Steel Strand |
|---|---|
| Steel Grade | SWRH 82B High Carbon Steel |
| Standard | GB/T 5224-2014, ASTM A416, BS 5896, JIS G 3536 |
| Featrue | Low Relaxtion |
| Tensile Strength | 1860Mpa |
| Diameter | 9.53-21.8mm |
| Package | Packing In Coils ,with PVC Film And Weaving Bag / Hessian Cloth |
| Application | Bridges On Railway And Highway, Overhead Crane Beam, Rock-soil Anchoring Project |
Trade Information
Brand Name
CSW
Model Number
CSW-PC-1*7
Place of Origin
Shandong, China
Certification
SGS, ISO, CE, ROHS
Standard Packaging
3.0-3.5Tons /Coil
Delivery Time
5-10 Days
Payment Terms
T/T
Supply Ability
70000 Tons/Year
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Product Introduction
Prestressed steel strands are manufactured from high carbon steel wire rods through processes including acid washing, phosphating, cold drawing, twisting, and stabilization treatment. Each bundle contains 2-7 steel wires with a diameter range of 9.53mm-21.6mm. The product strictly adheres to the GB/T 5224-2014 standard, featuring a yield strength of ≥ 1860MPa and maximum total elongation of ≥ 3.5%, with core properties of high strength and low relaxation.
Surface treatments such as galvanizing and epoxy coating are available to meet requirements in various corrosive environments.
Product Advantages
- Excellent mechanical properties: Using the Soxhlet treatment process, tensile strength is 3-4 times that of ordinary steel, relaxation loss is ≤ 2.5%, and long-term prestress retention rate exceeds 97%.
- Outstanding construction efficiency: Single bundles have large weight and strong flexibility, significantly reducing threading frequency on site, with construction speed increased by more than 40% compared to ordinary steel bars.
- Durable and reliable: Special anti-corrosion coating withstands Cl⁻ erosion with service life exceeding 50 years in marine engineering and saline alkali environments.
- Accurate cost control: Material utilization rate exceeds 95%, with maintenance costs in later stages only 30% of ordinary steel structures, offering significant cost advantages throughout the entire lifecycle.
Applications
Widely used in bridge engineering (large-span cable-stayed bridges, suspension bridge box girders), high-rise buildings (super core tubes, transfer layer structures), water conservancy facilities (dam bodies, prestressed anchoring of aqueducts), rail transit (ballastless track slabs of high-speed railways, shield tunnel segments), and geotechnical anchoring (slope support, foundation pit anchoring). This product serves as the core load-bearing component of modern prestressed concrete structures.
Certifications
Our steel wire rope meets international production standards and has obtained multiple certifications including SGS, CE, ISO, and others.
Technical Data — Diameter, Weight & Breaking Load
| Steel Strand Structure | Nominal Diameter Da /mm | Dia Tolerance /mm | Strand Nominal Cross-Sectional Area Sn/mm² | Approx. Weight per meter(g/m) | Range(extened)% of core wire's diameter not less than |
|---|---|---|---|---|---|
| 1x7 | 9.50 (9.53) | +0.30 -0.15 | 54.8 | 430 | 2.5 |
| 11.10 (11.11) | 74.2 | 582 | |||
| 12.70 | 98.7 | 775 | |||
| 15.20 (15.24) | 140 | 1101 | |||
| 15.70 | +0.40 -0.15 | 150 | 1178 | ||
| 17.80 (17.78) | 191 (189.7) | 1500 | |||
| 18.90 | 220 | 1727 | |||
| 21.60 | 285 | 2237 |
| Grade | Nominal Diameter (mm) | Tolerance (mm) | Area of Section (mm²) | Weight of strand (kg/1000m) | Minimum Breaking Load (KN) | Minimum Load at 1% extension (KN) | Elongation not less than (%) | 1000Hrs Relaxation Value Not More Than |
|---|---|---|---|---|---|---|---|---|
| 250 | 9.53 | ±0.41 | 51.61 | 405 | 89.0 | 80.1 | 3.5 | 2.5 (70% Initial Load)3.5 (80% Initial Load) |
| 250 | 11.11 | 69.68 | 548 | 120.1 | 108.1 | 3.5 | 2.5 (70% Initial Load)3.5 (80% Initial Load) | |
| 250 | 12.70 | 92.90 | 730 | 160.1 | 144.1 | 3.5 | 2.5 (70% Initial Load)3.5 (80% Initial Load) | |
| 270 | 9.53 | +0.65 -0.15 | 54.84 | 432 | 102.3 | 92.1 | 3.5 | 2.5 (70% Initial Load)3.5 (80% Initial Load) |
| 270 | 11.11 | 74.19 | 582 | 137.9 | 124.1 | 3.5 | 2.5 (70% Initial Load)3.5 (80% Initial Load) | |
| 270 | 12.7 | 98.71 | 775 | 183.7 | 165.3 | 3.5 | 2.5 (70% Initial Load)3.5 (80% Initial Load) | |
| 270 | 15.24 | 140.00 | 1102 | 260.7 | 234.6 | 3.5 | 2.5 (70% Initial Load)3.5 (80% Initial Load) |
Values are typical mill data. Request the full mill test certificate for your exact specification.
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