Contact Info
- Tel: +86-311-87813582
- Fax: +86-311-87829648
- Email: Kaiwork@126.com
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- Add: No.345, Youyi North Street, Shijiazhuang City, Hebei Province, China.
ASTM A416 Standard Infrastructure Grade. Engineered in strict compliance with ASTM A416 Grade 270, our 15.24mm (0.6 inch) 7-wire bonded prestressed concrete steel strand delivers heavy-duty ultimate breaking load performance, strict metallurgical tolerances, and certified compliance for demanding global civil engineering projects.
Grade 270 15.24mm (0.6 inch) Low Relaxation Bonded PC Strand | ASTM A416 7-Wire Steel Strand
​Designed for critical heavy-load paths and high-stress structural spans under ASTM/ASCE design standards. Every coil adheres to rigorous mechanical benchmarks.
|
Technical Parameter |
Specification Value |
Governing Standard |
|
Nominal Diameter |
15.24 mm (0.600 inch / 3/5") |
ASTM A416 / A416M |
|
Strand Configuration |
7-Wire (1 Center Wire + 6 Helical Outer Wires) |
ASTM A416 |
|
Nominal Cross-Sectional Area |
140.0 mm² (0.217 in²) |
ASTM A416 |
|
Specified Tensile Strength |
Grade 270 (1860 MPa) |
ASTM A416 |
|
Minimum Breaking Load (MBL) |
≥ 260.7 kN (58,600 lbs) |
ASTM A416 |
|
Relaxation Class |
Class 2 (Low Relaxation, Max 2.5% at 1000h) |
ASTM A416 / JIS G3536 |
|
Surface Condition |
Uncoated, Bright, Stress-Relieved, Bonded |
Clean |
· ​ASTM A416 Certified Compliance: Manufactured strictly to meet the stringent mechanical, geometric, and relaxation requirements of the American standard for prestressed concrete tendons.
· ​Heavy-Duty Load Capacity: The 140.0 mm² nominal cross-section and 260.7 kN minimum breaking load provide the exceptional tensile strength required for massive structural spans.
· ​Low-Relaxation Stability (Class 2): Advanced thermal-mechanical stabilization restricts stress relaxation to a maximum of 2.5% at 1000 hours, ensuring permanent prestressing force retention over extended lifecycles.
· ​Enhanced Bonding Interlock: The precise 7-wire helical geometry creates an optimal mechanical bond with structural cement grout, eliminating slip in post-tensioned applications.
​Engineered for heavy-load-bearing structures across global markets utilizing ASTM design standards:
· ​Major Transportation Projects: Long-span highway and railway bridges, box girders, precast segmental bridges, and elevated viaducts.
· ​Commercial & High-Rise Buildings: Post-tensioned slab systems, parking structures, and large-span industrial roofs.
· ​Geotechnical & Marine Engineering: High-capacity ground anchors, rock slopes, dam stabilization, and deepwater port wharfs.
​Q: Do these strands fully comply with ASTM A416 Grade 270 specifications?
A: Yes. Our 15.24mm strands are produced in strict compliance with ASTM A416 / A416M, ensuring complete acceptance by international consulting engineers and main 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. A standard 20ft container loads approximately 20 to 27 metric tons.
​Q: Can we request third-party quality inspection prior to shipment?
A: Yes. We fully support independent pre-shipment inspections and audits conducted by recognized global agencies such as SGS, BV, Intertek, or TUV.
