High Carbon Prestressed Concrete Steel Strand 12.7mm Low Relaxation 7 Wire Prestressing Strand

Product Introduction

Prestressed steel strands are manufactured from high-strength carbon steel wire rods through cold drawing, twisting, and stabilization processes. Each strand consists of 7 high-strength steel wires with a diameter of 15.2mm and tensile strength of ≥1860MPa. Produced in strict compliance with GB/T 5224-2014 standards, these strands feature surface treatments including hot-dip galvanizing or epoxy coating for excellent corrosion resistance.

The relaxation rate is ≤2.5%, ensuring long-term stress maintenance.

Product Advantages

• Ultra high strength and toughness: Breaking force ≥260kN, elongation ≥3.5%, maintaining structural integrity under extreme loads Low relaxation characteristics: Low-temperature stabilization technology reduces long-term stress loss by 40% compared to ordinary steel strands, ensuring long-term structural safety Strong corrosion resistance: Hot-dip galvanized layer thickness ≥275g/㎡, epoxy coating adhesion ≥10MPa, suitable for harsh environments including ocean and salt alkali conditions Convenient construction: Lightweight and flexible single bundles facilitate easy threading and tensioning on site, increasing construction efficiency by over 30% compared to traditional steel bars

Applications

s Widely used in large-span bridges (suspension bridges, cable-stayed bridge box girders), high-rise buildings (super high-rise shear wall structures), hydraulic engineering (dams, prestressed anchoring of aqueducts), rail transit (ballastless track slabs for high-speed rail), and geotechnical anchoring (slope support, foundation pit anchoring) and other fields. Product Certifications Our steel wire rope meets international production standards and has obtained multiple certifications including: SGS CE ISO

Technical Data — Diameter, Weight & Breaking Load

Values are typical mill data. Request the full mill test certificate for your exact specification.