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Help CenterSteel Wire Rope & Galvanized Steel Strand，65#、70#、75#、80#
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Steel Wire Rope & Galvanized Steel Strand，65#、70#、75#、80#NegotiableMOQ: 5 Metric Tons -
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Steel Billet，Main Materials Q195, Q235B, Q355B, 20#, 45#, SS400, A36, S235JR,NegotiableMOQ: 1 Metric Ton
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Steel Billet，Main Materials Q195, Q235B, Q355B, 20#, 45#, SS400, A36, S235JR,NegotiableMOQ: 1 Metric Ton
I. Product Overview
Steel strand is a spiral metal product made of multiple high-strength carbon steel wires (commonly 82B high-carbon steel) through cold drawing, stranding, and stabilization treatment. It features ultra-high strength, excellent toughness, low relaxation, and fatigue resistance, serving as the core load-bearing material for prestressed concrete, electric power, and geotechnical engineering.
II. Material & Standards
Material: High-quality high-carbon steel wire rod (82B) with a carbon content of 0.80%-0.85%, processed into high-strength steel wires through cold drawing.
Implementation Standards: National Standard GB/T 5224, American Standard ASTM A416, British Standard BS 5896.
Surface Treatment: Bright (uncoated), galvanized, epoxy coated, unbonded (grease + PE sheath).
III. Structure & Specifications
1. Common Structures
1×7 Structure (mainstream): 1 central wire + 6 outer wires, most widely used.
1×2, 1×3 Structures: Suitable for small components and stay wires.
1×19 Structure: Better flexibility, suitable for large-span and complex working conditions.
2. Main Specifications (Including Model & Material, Presented in Table)
Core Material: The entire series adopts 82B high-carbon steel wire rod (carbon content 0.80%-0.85%), processed into high-strength steel wires through cold drawing, complying with GB/T 5224, ASTM A416 and BS 5896 standards.
Model Explanation: S stands for steel strand, 1×7 is the structure type. After the hyphen are nominal diameter (mm), strength grade (MPa), and relaxation grade (LC for low relaxation) in sequence. Suffix can be added according to surface treatment (e.g., G for galvanized, E for epoxy coated, U for unbonded).
Product Model |
Material |
Nominal Diameter (mm) |
Structure |
Strength Grade (MPa) |
Theoretical Weight (kg/km) |
Breaking Force (kN) |
Application Scenarios |
|---|---|---|---|---|---|---|---|
S1×7-9.53-1860/1960-LC |
82B High-Carbon Steel |
9.53 |
1×7 |
1860/1960 |
432 |
80 |
Small components, floor slabs |
S1×7-12.7-1860/1960-LC |
82B High-Carbon Steel |
12.7 |
1×7 |
1860/1960 |
775 |
145 |
Overpasses, hollow slab beams |
S1×7-15.24-1860/1960-LC |
82B High-Carbon Steel |
15.24 |
1×7 |
1860/1960 |
1102 |
260 |
Bridges, high-rise buildings, sleepers |
S1×7-17.8-1860-LC |
82B High-Carbon Steel |
17.8 |
1×7 |
1860 |
1500 |
355 |
Large box girders, geotechnical anchoring |
S1×7-21.6-1860-LC |
82B High-Carbon Steel |
21.6 |
1×7 |
1860 |
2230 |
532 |
Long-span bridges, stay cables |
IV. Performance Parameters
Tensile Strength: 1860MPa (standard), 1960MPa (high strength), 2160MPa (ultra-high strength).
Relaxation Grade: Low Relaxation (LC) (mainstream, 1000h relaxation rate ≤2.5%), Ordinary Relaxation (Grade Ⅰ).
Elongation: Total elongation at maximum force ≥3.5%.
Elastic Modulus: (1.95±0.10)×10⁵ MPa.
Yield Strength: ≥0.85×standard value of tensile strength.
V. Product Types
Product Type |
Product Model (Prefix/Common Model) |
Material |
Product Features |
Application Scenarios |
|---|---|---|---|---|
Prestressed Steel Strand |
Prefix S1×7/S1×19, Common Model S1×7-15.24-1860-LC |
82B High-Carbon Steel |
Bright/indented, suitable for pre-tensioned/post-tensioned prestressed concrete |
Bridges, buildings, sleepers |
Galvanized Steel Strand |
Prefix GS1×7/GS1×19, Common Model GS1×7-12.7-1860-LC |
82B High-Carbon Steel (hot-dip galvanized surface) |
Strong corrosion resistance, anti-oxidation, anti-rust |
Power ground wires, telephone pole stay wires, coastal projects |
Unbonded Steel Strand |
Prefix US1×7, Common Model US1×7-15.24-1860-LC |
82B High-Carbon Steel (coated with anti-corrosion grease + HDPE sheath) |
No grouting required, convenient construction |
Slopes, foundation pits, post-tensioned unbonded structures |
Epoxy Coated Steel Strand |
Prefix ES1×7, Common Model ES1×7-17.8-1860-LC |
82B High-Carbon Steel (fully enclosed epoxy coating) |
Extremely strong corrosion resistance |
Chemical industry, cross-sea bridges, high-corrosion environments |
Aluminum-Clad Steel Strand |
Prefix AS1×7/AS1×19, Common Model AS1×7-15.24-1860-LC |
Aluminum-Clad 82B High-Carbon Steel |
Both conductive and high-strength, excellent comprehensive performance |
Transmission lines, ground wires |
VI. Production Process
High-carbon steel wire rod → Surface treatment → Cold drawing → Single wire inspection → Stranding → Stabilization heat treatment → Surface coating (optional) → Finished product inspection → Shaftless/spool packaging.
VII. Application Fields
Bridge Engineering: Highway/railway bridges, cross-sea bridges, cable-stayed bridges, suspension bridge hangers.
Construction Engineering: High-rise buildings, large-span factories, stadiums, prestressed floor slabs.
Electric Power Engineering: Overhead ground wires, transmission conductors, cable reinforcement cores.
Geotechnical Engineering: Slope anchoring, foundation pit support, dike reinforcement, tunnel anchor rods.
Others: Sleepers, docks, hoisting, mine support.
VIII. Product Advantages
High Strength: Its strength is 4-5 times that of ordinary steel bars, effectively reducing the self-weight of the structure.
Low Relaxation: Small stress loss under long-term force, strong structural stability.
Good Toughness: Can be bent and coiled, easy to transport and construct.
Strong Durability: Coating or galvanizing can greatly improve the anti-corrosion service life.
High Cost-Effectiveness: Lower cost under the same bearing capacity, convenient and efficient construction.
IX. Packaging & Delivery
Packaging: Shaftless coil (net weight about 2.5-3 tons), spool packaging.
Length: No joints per coil, customizable on demand (conventional length ≥200m).
Delivery Time: 5-7 days.
X. Selection Tips
Select appropriate diameter and strength according to engineering load (priority to 1860MPa low relaxation type).
For corrosive environments, select galvanized, epoxy coated or unbonded steel strands.
Confirm that the product complies with relevant standards and request quality guarantee certificate and mechanical performance report.
Match the corresponding anchor and fixture models when purchasing.
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