High-Strength Prestressed Concrete Strand (PC Strand): Multi-Standard Solutions for Bridges & High-Rises.
7-Wire PC Strands with 1,860 MPa Tensile Strength & ≤2.5% Relaxation.
Engineered to ASTM A416, GB/T5224, and BS 5896, our prestressed steel strands deliver 20–30% higher load capacity than conventional rebar for post-tensioned bridges, nuclear plants, and seismic-resistant structures. Available in 9.5–21.6mm diameters with low relaxation (2.5–4.5%), these 1×7 wire strands meet global standards for unbonded, spiral-ribbed, and epoxy-coated applications.
Key Features:
- Relaxation Class: Class II (≤2.5% @70% Fm)
- Yield Load: 166–353 kN (12.7–17.8mm)
- Certifications: ISO 9001, CE Mark, AS/NZS 4672
Technical Specifications by Standard
GB/T 5224-2003 (China)
| Diameter | Tensile Strength | Yield Load (Fp0.2) | Elongation | Relaxation | Weight/km |
|---|---|---|---|---|---|
| 12.7mm | 1,860 MPa | ≥166 kN | ≥3.5% | ≤2.5% | 775 kg |
| 15.2mm | 1,860 MPa | ≥260 kN | ≥3.5% | ≤4.5% | 1,101 kg |
| 17.8mm | 1,860 MPa | ≥353 kN | ≥3.5% | ≤4.5% | 1,500 kg |
ASTM A416-06 (USA)
| Diameter | Breaking Force | Relaxation | Weight/km | Applications |
|---|---|---|---|---|
| 12.7mm | ≥184 kN | ≤2.5% | 775 kg | Precast beams, parking garages |
| 15.24mm | ≥261 kN | ≤2.5% | 1,102 kg | Nuclear containment vessels |
Performance Advantages
- Ultra-Low Relaxation:
- 2.5% relaxation after 1,000 hours @70% Fm (vs. 4.5% industry average).
- Anti-Fatigue Design:
- Withstands 2 million cycles @30% breaking load (ISO 6946).
- Corrosion Resistance:
- Galvanized/Epoxy-coated options for coastal or chemical environments.
Why Choose Our Strands?
- Precision Tolerance: ±0.4mm/-0.2mm (tighter than ISO 6934).
- Custom Lay Length: 14–16×diameter for optimal stress distribution.
Applications & Compliance
| Diameter | Standard | Use Case | Load Capacity |
|---|---|---|---|
| 12.7mm | BS 5896, ISO 6934 | Highway bridge girders | 156–166 kN |
| 15.2mm | JIS G3536, KS D | High-rise building slabs | 220–260 kN |
| 17.8mm | UNE 36094, AS/NZS | Offshore wind turbine foundations | 353–358 kN |
Certifications:
- ISO 6892-1: Tensile testing compliance
- TUV SÜD: Fatigue resistance verification
- UL Certified: Fire-resistant coatings
Manufacturing & Quality Control
- Wire Drawing: SAE 1080 billets cold-drawn to ±0.02mm tolerance.
- Stranding: 7-wire helical formation (right/left lay).
- Stress Relief: Stabilized at 350°C for ≤2.5% relaxation.
- Testing:
- Relaxation Test: 20°C ±2°C, 1,000h (EN 10138).
- Salt Spray Test: 2,000+ hours (ASTM B117).
Packing And Delivery
