1. Product Overview
Steel strand is a high-strength prestressing material manufactured by twisting multiple high-strength steel wires together. It offers high tensile strength, excellent load-bearing capacity, dimensional stability, and long-term durability, making it widely used in bridges, buildings, railways, highways, water conservancy projects, geotechnical anchoring, and other major infrastructure projects.
Our steel strand product range covers multiple strand configurations, diameters, and strength grades, allowing customers to select suitable products according to specific structural requirements, load capacity, and service conditions.
Our products are manufactured in accordance with applicable standards, including GB/T 5224-2023 and GB/T 33363-2016, as well as relevant enterprise standards.
2. Product Range
2.1 Standard Steel Strand
Standard steel strand is manufactured from high-strength steel wires through a controlled stranding process, offering reliable mechanical performance and consistent quality.
Available specifications include:
- 1×7—9.53
- 1×7—12.7
- 1×7—15.2
- 1×7—15.7
- 1×7—17.8
- 1×7—18.9
- 1×7—21.6
- 1×19—21.8
- 1×19—28.6
Strength grades include 1770 MPa, 1860 MPa, and 1960 MPa, depending on the product specification.
Applicable Standard: GB/T 5224-2023
Suitable for prestressed concrete structures, bridges, buildings, and other engineering applications requiring high-strength prestressing materials.
2.2 Ultra-High-Strength Steel Strand
Ultra-high-strength steel strand is designed for projects requiring higher tensile strength and enhanced load-bearing performance.
Available specifications include:
- 1×7—15.2, 2230 MPa
- 1×7—15.7, 2160 MPa
- 1×7—17.8, 2230 MPa
- 1×19—21.8, 2230 MPa
Applicable Standard: GB/T 5224-2023
With strength levels reaching up to 2230 MPa, ultra-high-strength steel strand is suitable for demanding bridge structures, large-scale infrastructure, and other applications where high-strength prestressing materials are required.
2.3 Low-Temperature Steel Strand
Low-temperature steel strand is developed for applications where reliable performance is required under low-temperature service conditions.
Available specification:
- 1×7—15.2, 1860 MPa
It is suitable for engineering projects operating in cold or low-temperature environments where specific material performance requirements must be met.
2.4 Galvanized Steel Strand
Galvanized steel strand features a protective zinc coating that helps improve corrosion resistance and durability. It is particularly suitable for applications exposed to demanding environmental conditions.
Available specifications include:
- 1×7—12.7
- 1×7—15.2
- 1×7—15.7
- 1×7—17.8
- 1×19—21.8
Standard strength grade:
1860 MPa
Applicable Standard: GB/T 33363-2016
Galvanized steel strand is suitable for projects requiring enhanced corrosion protection and long-term service performance.
2.5 Unbonded Prestressing Steel Strand
Unbonded prestressing steel strand is manufactured using a specialized protective process to enable independent movement between the prestressing steel strand and the surrounding concrete.
Available specifications include:
- 1×7—12.7, 1860 MPa
- 1×7—15.2, 1860 MPa
- 1×7—17.8, 1860 MPa
It is widely applicable to unbonded post-tensioning systems, prestressed concrete structures, buildings, and other specialized prestressing applications.
3. Key Product Advantages
High Tensile Strength
With strength grades ranging from 1770 MPa to 2230 MPa, our steel strands can meet a wide range of structural load-bearing and prestressing requirements.
Wide Range of Specifications
The product range covers 1×7 and 1×19 strand configurations and multiple nominal diameters, providing flexibility for different engineering designs.
Comprehensive Product Portfolio
Our portfolio includes:
Standard Steel Strand | Ultra-High-Strength Steel Strand | Low-Temperature Steel Strand | Galvanized Steel Strand | Unbonded Prestressing Steel Strand
This enables us to provide suitable solutions for different structural requirements and service environments.
Standards-Compliant Manufacturing
Products are manufactured according to applicable national standards and enterprise standards, with controlled production processes designed to ensure consistent product quality and performance.
Reliable Engineering Performance
The combination of high strength, structural stability, and durability makes steel strand an important prestressing material for modern infrastructure construction.
4. Typical Applications
Steel strand can be widely used in:
Bridge Construction | Building Construction | Railway Projects | Highway Projects | Water Conservancy | Prestressed Concrete Structures | Geotechnical Anchoring | Large-Scale Infrastructure
Typical applications include:
- Prestressed concrete beams and slabs
- Bridge decks and bridge structures
- Long-span structural systems
- Railway and highway infrastructure
- Large-scale concrete structures
- Geotechnical anchoring systems
- Infrastructure requiring high-strength prestressing materials
5. Product Specification Overview
| Product Series | Typical Specifications | Strength Grade |
|---|---|---|
| Standard Steel Strand | 1×7—9.53 to 21.6; 1×19—21.8 to 28.6 | 1770–1960 MPa |
| Ultra-High-Strength Steel Strand | 1×7—15.2 to 17.8; 1×19—21.8 | 2160–2230 MPa |
| Low-Temperature Steel Strand | 1×7—15.2 | 1860 MPa |
| Galvanized Steel Strand | 1×7—12.7 to 17.8; 1×19—21.8 | 1860 MPa |
| Unbonded Prestressing Steel Strand | 1×7—12.7 to 17.8 | 1860 MPa |
Note: Specifications and strength grades are subject to the actual product technical documentation and confirmed supply range.
6. Product Positioning
With a comprehensive range of specifications and strength grades, our steel strand products are designed to provide high-strength, reliable, and application-specific prestressing solutions for modern construction and infrastructure projects.
From conventional prestressed structures to demanding applications requiring ultra-high strength, low-temperature performance, corrosion resistance, or unbonded prestressing, we provide a diversified steel strand portfolio to support different project requirements.
Need a specific strand specification?
We supply per project drawings and standards — custom diameters, grades and packaging.