Contact Info
- Tel: +86-311-87813582
- Fax: +86-311-87829648
- Email: Kaiwork@126.com
- Whatsapp: +86 86 138 3318 2035
- Add: No.345, Youyi North Street, Shijiazhuang City, Hebei Province, China.
Ultra-High Capacity Infrastructure Grade. Engineered for extreme-load post-tensioned and pre-tensioned structures, our 17.8mm (0.7 inch) 7-wire bonded prestressed concrete steel strand delivers massive ultimate breaking load performance, strict metallurgical tolerances, and certified compliance with international civil engineering standards.
17.8mm (0.7 inch) 7-Wire Low-Relaxation Bonded PC Strand | ASTM A416 Grade 270
​Designed for critical heavy-load paths, high-stress structural spans, and massive anchoring systems. Every coil adheres to stringent international mechanical benchmarks.
|
Technical Parameter |
Specification Value |
Governing Standard |
|
Nominal Diameter |
17.8 mm (0.700 inch / 7/10") |
ASTM A416 / A416M |
|
Strand Configuration |
7-Wire (1 Center Wire + 6 Helical Outer Wires) |
BS 5896 / EN 10138-3 |
|
Nominal Cross-Sectional Area |
Approx. 150～190 mm² (Project Grade Dependent) |
GB/T 5224 |
|
Specified Tensile Strength |
1860 MPa (Grade 270) |
ISO 6934-4 |
|
Minimum Breaking Load (MBL) |
≥ 265～320 kN (Heavy-Duty Class) |
ASTM A416 |
|
Relaxation Class |
Class 2 (Low Relaxation, Max 2.5% at 1000h) |
JIS G3536 |
|
Surface Condition |
Uncoated, Bright, Stress-Relieved, Bonded |
Clean, Corrosion-Inhibited Free |
· ​Extreme Load-Bearing Performance: The large cross-sectional area and ultra-high breaking load provide the massive tensile capacity required for long-span and high-stress civil designs.
· ​Superior Low-Relaxation Stability: Advanced thermal-mechanical stabilization minimizes long-term stress relaxation, ensuring permanent, reliable prestressing force over extended structure lifecycles.
· ​Enhanced Mechanical Interlock: Optimized 7-wire helical geometry maximizes shear bond strength between the steel tendon and structural cement grout in post-tensioned configurations.
· ​Full Metallurgical Traceability: Manufactured under strict ISO 9001 protocols. Each commercial shipment includes a comprehensive Mill Test Certificate (MTC) detailing chemical composition and mechanical test logs.
​Engineered for heavy-load-bearing structures across large-scale civil, energy, and marine projects:
· ​Mega-Transportation Projects: Extra-long-span highway and railway bridges, cable-stayed bridges, continuous rigid frames, and viaducts.
· ​Energy & Heavy Infrastructure: Nuclear containment vessels, LNG concrete storage tanks, and heavy industrial foundations.
· ​Geotechnical & Marine Engineering: High-capacity ground anchors, rock slopes, dam stabilization, and deepwater port wharfs.
​Q: What international standards do your 17.8mm PC strands comply with?
A: Our 17.8mm heavy-duty steel strands comply strictly with ASTM A416, BS 5896, EN 10138, and GB/T 5224, matching the precise blueprint demands of global engineering contractors.
​Q: What is the standard export packaging and container load?
A: Coils are wrapped in moisture-proof plastic film and heavy-duty anti-rust woven cloth, secured with high-tensile steel strapping, and palletized for secure transport. A standard 20ft container loads approximately 20 to 27 metric tons.
​Q: Can we arrange third-party inspection prior to dispatch?
A: Yes. We fully support independent pre-shipment inspections and audits conducted by recognized global agencies such as SGS, BV, Intertek, or TUV.
