High-Strength 15.7mm Low Relaxation Prestressed Steel Strand for Advanced Infrastructure Projects
Engineered for durability, precision, and long-term performance, this 15.7mm low relaxation prestressed steel strand is a cornerstone in modern construction, particularly for high-load applications such as long-span bridges, super-tall buildings, and large-scale dam systems. Manufactured from premium high-carbon steel wire rods through cold drawing, twisting, and stress-relaxation stabilization, each strand consists of seven wires tightly wound together to form a robust, uniform structure with a cross-sectional area of approximately 191.8 mm². With a tensile strength exceeding 1860 MPa and a breaking load surpassing 357 kN, it ensures structural integrity under extreme conditions while minimizing prestress loss over time.
One of the most critical advantages of this product lies in its exceptional resistance to relaxation—under 70% of nominal stress at 20°C, the relaxation rate within 1000 hours remains below 2.5%. This means engineers can rely on consistent tensioning throughout the lifespan of a project, reducing maintenance needs and enhancing safety margins. Available in galvanized, epoxy-coated, or HDPE-sheathed variants, the strand offers enhanced corrosion protection for both indoor and outdoor environments, making it ideal for coastal regions, industrial zones, or humid climates where material degradation poses a risk.
The manufacturing process at Chunpeng Group integrates decades of expertise in prestressed concrete (PC) materials, ensuring that every coil—typically packaged between 3 to 5 tons—is delivered with uniform quality, precise dimensions, and predictable mechanical behavior. Whether used in post-tensioned slabs, bridge girders, or transfer floors in skyscrapers, this steel strand delivers superior load distribution, improved crack control, and extended service life. Its compatibility with advanced anchorage systems further boosts efficiency during installation, enabling faster construction timelines without compromising structural performance.
Commonly referred to as ultra-high tensile strength PC Strand or bonded prestressing tendon, this product serves as an essential component in infrastructure projects requiring long-term reliability. From precast segmental bridges to high-rise foundation systems, it supports the evolution of resilient, sustainable civil engineering solutions worldwide. By combining technical excellence with innovative surface treatments, Chunpeng Group provides not just a product but a comprehensive solution tailored to global construction standards and environmental challenges.
Users consistently report improved project outcomes when using this strand: reduced need for mid-life reinforcement, lower lifecycle costs, and greater confidence in structural stability. For engineers seeking a balance between strength, durability, and ease of installation, this 15.7mm Low Relaxation steel strand stands out as a preferred choice in modern construction practices across Europe, North America, Australia, and beyond.
What makes this strand unique compared to standard alternatives? Its ability to maintain tensile force over thousands of hours under sustained loading—a feature crucial for structures subjected to dynamic forces like wind, seismic activity, or heavy traffic. Additionally, the availability of coated versions allows for customization based on local climate conditions, ensuring optimal performance regardless of exposure level. Whether you're designing a new highway overpass or reinforcing an aging water reservoir, this strand offers a proven, future-ready foundation.
Why do contractors prefer this particular grade? Because it reduces uncertainty in post-tensioning operations, minimizes early-age cracking, and enhances overall building resilience. It’s not just about meeting specifications—it’s about exceeding expectations in terms of longevity, safety, and cost-effectiveness. In short, this is more than a steel strand; it's a strategic investment in engineered excellence.
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