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Help CenterSteel Wire Rope & Prestressed Steel Strand / PC Strand，1720MPa、1860MPa、1960MPa
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1. Product Overview
Steel strand is special prestressed steel formed by precisely stranding multiple high-strength high-carbon steel wires followed by stabilization treatment. It boasts high tensile strength, low relaxation rate, good toughness, strong bonding force and stable deformation, serving as the core tensioning material for bridges, infrastructure, geotechnical anchoring and prestressed concrete projects.
It is refined from SWRH82B high-carbon steel wire rod, featuring precise dimensions, no broken wires, no strand separation and outstanding corrosion resistance. Sufficient spot stock is available, delivery cycle: 5–7 days, shipped from Tianjin Port, suitable for foreign trade orders of domestic and overseas road & bridge construction, infrastructure, mining and photovoltaic projects.
2. Product Classification and Characteristics
2.1 Ordinary Prestressed Steel Strand (Black Bare Strand)
Standard: GB/T 5224-2023Production Process: Wire drawing, stranding, low-temperature stabilization & relaxation treatmentAdvantages: High strength, low relaxation value, strong bonding force and optimal cost performanceApplications: Bridge box girders, beam slabs, prestressed factory buildings and municipal concrete projects
2.2 Galvanized Steel Strand (Weather & Corrosion Resistant Grade)
The whole strand undergoes hot-dip galvanizing with uniform and well-adhered zinc coating.Advantages: Rust-proof, acid & alkali resistant, anti-aging and long service life outdoorsApplications: Power stay wires, curtain wall cables, mountain slope protection, mine support and overhead suspension projects
2.3 Epoxy Coated Steel Strand (High-End Anti-Corrosion Grade)
Fully wrapped by epoxy resin with all wire gaps completely sealed.Advantages: Superb corrosion resistance, chloride resistance, waterproof and moisture-proof, preventing strand fracture caused by rustApplications: Sea-crossing bridges, coastal high salt-fog projects, water conservancy docks and high-risk anti-corrosion projects
3. Main Specifications & Models
3.1 Common Structure
Standard 7-wire type (most widely used in engineering)
3.2 Nominal Diameter
9.53mm, 12.7mm, 15.2mm, 17.8mm
3.3 Strength Grades
1720MPa, 1860MPa, 1960MPa (1860MPa is the mainstream grade on the market)
3.4 Relaxation Grades
Normal Relaxation, Low Relaxation (LR)Low-relaxation steel strand features low residual stress and no deformation under long-term tension, which is the standard matching material for modern engineering.
4. Core Material & Performance Parameters
Raw Material: SWRH82B / SWRS82B high carbon steel
High tensile strength, stable elongation and standard elastic modulus
Low relaxation performance: 1000-hour relaxation rate ≤2.5%
Tightly stranded without separated strands or jump wires, smooth surface
Strong bonding force with concrete to avoid structural sliding
5. Domestic & International Executive Standards
National Standard: GB/T 5224-2023International Equivalent Standards: ASTM A416, EN10138, BS5896, ISO6934, JIS G3536Mill test certificate, mechanical property test report and relaxation test report are attached to each batch; SGS third-party re-inspection is supported.
6. Core Product Advantages
Ultra-high tensile capacity extends the span and bearing capacity of concrete structures significantly;
Stable low-relaxation performance prevents retraction and deformation under long-term stress, ensuring excellent engineering durability;
Clear stranded texture enables tight occlusion with concrete to avoid shedding and sliding;
Complete anti-corrosion product range including bare black strand, galvanized strand and epoxy coated strand;
Mature manufacturing process with zero broken wires or disordered strands, small dimensional tolerance and 100% pass rate in tension construction;
Stable delivery with full-coil spot inventory and export-grade packaging suitable for long-distance sea transportation.
7. Main Application Fields
Road & Bridge Engineering: Prestress tensioning for highway bridges, railway bridges, box girders, T-beams and continuous beams;
Geotechnical Anchoring: Mountain slope protection, foundation pit support, tunnel anchor bolts and mine anchor cables;
Construction Infrastructure: Large-span factory buildings, gymnasiums, underground parking lots and prestressed floor slabs;
Electric Power & Communication: Overhead stay wires, pole traction cables and power suspension cables;
Water Conservancy & Docks: Dam reinforcement, sea-crossing projects and port prestressed structures;
New Energy Engineering: Anchorage of photovoltaic foundations and tension reinforcement of wind power foundations.
8. Packaging, Logistics & Commercial Terms
Packaging: Wound into large coils, lined with waterproof paper, wrapped with outer plastic film and fastened by steel strips for moisture and collision prevention;
Loading Port: Tianjin Port, loadable in 20GP/40HQ full containers for export;
Lead Time: 5–7 days for regular spot goods, 10–15 days for customized epoxy coated strands;
Payment Term: 30% TT advance payment, balance settled before shipment;
Quality Warranty: Guaranteed compliance on tensile strength, relaxation performance and dimensions. Unconditional return and replacement for products with broken wires or quality defects.
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