Specializing in the production of various stainless steel pipes, plates, coils, rods, pipe fittings, high nickel alloy steel products, high temperature resistant products
PRODUCTS
Steel Strand
Category:
Steel Strand
keywords :
Steel Strand
Product Description
Produced by cold drawing high-carbon steel wire rod, then stranding seven wires (one center wire with six outer wires helically wrapped) to form a compact, high-strength bundle. Features high tensile strength, low relaxation, excellent fatigue resistance, and good bond with concrete. Available grades: 1860 MPa, 1770 MPa, 1570 MPa, 2000 MPa (ultra-high strength). Strand configuration: 1×7 (standard), 1×3, or 1×19. Nominal diameter: 9.5mm – 21.8mm (most common: 12.7mm, 15.2mm, 15.7mm). Cross-sectional area: 50mm² – 300mm². Relaxation class: low relaxation (Class II, ≤2.5% at 1000h) or normal relaxation (Class I). Surface finish: plain (uncoated), epoxy-coated, or galvanized. Manufacturing: wires are drawn, stress-relieved, and stranded under controlled tension, then optionally heat treated for low relaxation. Meets ASTM A416, EN 10138, BS 5896, JIS G3536, or GB/T 5224 standards. Custom diameters, lengths, and relaxation classes available.
Parameter
| Product Name | Steel Wire Strand |
| Standard | AISI, ASTM, DIN, JIS, GB, JIS, SUS, EN, etc |
| Wire Type | Plain pc steel wire Spiral pc steel wire Indented pc steel wire |
| Type of Surface | Helix(screw), Plain, indented. |
| Grade | Dx51D, Dx52D, Dx53D, DX54D, S220GD, S250GD, S280GD, S350GD, S350GD, S550GD; SGCC, SGHC, SGCH, SGH340, SGH400, SGH440, SGH490,SGH540, SGCD1, SGCD2, SGCD3, SGC340, SGC340 , SGC490, SGC570; SQ CR22 (230), SQ CR22 (255), SQ CR40 (275), SQ CR50 (340), SQ CR80(550), CQ, FS, DDS, EDDS, SQ CR33 (230), SQ CR37 (255), SQCR40 (275), SQ CR50 (340), SQ CR80 (550); or Customer’s Requirement |
| Diameter | 4.00mm, 4.80mm, 5.00mm, 6.00mm, 6.25mm, 7.00mm,8mm,9mm |
| Coil weight | 1-3 tons |
| Elongation | 0.035 |
| Tensile Strength | 1470Mpa-1860Mpa |
| Application | Low relaxation pc steel wire used for prestressed steel structure, prestressed and posttensioning technology in large, medium and small sizes of various shapes of PC structures, such as civil engineering construction of large scale railroad, highway, etc. |
Application description
Widely used in prestressed concrete structures such as bridges (box girders, segmental bridges), high-rise buildings, parking garages, water tanks, nuclear containment vessels, railway sleepers, and post-tensioned slabs. Also suitable for ground anchors, cable-stayed bridges, mining roof support, and tension members. High tensile strength and low relaxation ensure long-term structural efficiency and crack control.
Production description
High-carbon steel wire rod is drawn to precise diameter, then stress-relieved by heat treatment. Seven wires (one center, six outer) are helically stranded together under controlled tension. For low relaxation strand, the product is further heat treated. The strand is then cut to length, inspected for tensile strength, relaxation, and lay uniformity.
Shipping Packaging
For export, steel strand coils are wrapped with VCI paper and moisture-proof polyethylene, secured with steel straps, packed on ISPM-15 wooden pallets or steel skids, and fitted with edge protectors. Labels include grade, diameter, length, and heat number for safe sea freight.
Why Choose Us?
1.Factory Strength:Direct manufacturer with integrated wire drawing, stress-relieving, stranding, and low-relaxation heat treatment lines, ensuring consistent tensile strength (1860MPa+), precise lay length, and stable strand geometry for diameters 9.5–21.8mm.
2.Quality Assurance:Strict control of tensile strength, yield strength (≥85% of ultimate), low relaxation (≤2.5% at 1000h), and fatigue performance; 100% tension testing; compliant with ASTM A416, EN 10138, BS 5896, JIS G3536, GB/T 5224.
3.Certifications & Reports:Mill test certificates (MTC) with each shipment; third-party inspections (SGS, BV) and relaxation test/fatigue test reports available upon request.
4.Customization & Service:Wide grade range (1570–2000MPa), diameters (9.5–21.8mm), strand configurations (1×3, 1×7, 1×19), relaxation classes (normal/low), surface finishes (plain, epoxy-coated, galvanized), and custom cut lengths with fast lead times.
5.Export Packaging:Coils wrapped with VCI paper + moisture-proof polyethylene + steel strapping + ISPM-15 pallets/steel skids + edge protectors for safe sea freight and rust prevention.
FAQ
1. How to store steel strand to prevent corrosion and maintain performance?
Store indoors on dry, clean wooden pallets or racks, keep original moisture-proof wrapping intact. Avoid contact with water, oil, acids, or chlorides. For long-term storage, maintain humidity below 60%. Surface rust that does not reduce wire diameter is generally acceptable, but heavy corrosion should be avoided as it may affect fatigue life.
2. What is the difference between low relaxation and normal relaxation steel strand?
Low relaxation strand (Class II) has a relaxation loss ≤2.5% at 1000 hours under 70% of ultimate strength, offering better long-term prestress retention, ideal for post-tensioned and pretensioned concrete structures. Normal relaxation strand (Class I) has higher relaxation loss (≥4.5%), suitable for less critical applications or where frequent tension adjustments are possible.
3. Can steel strand be cut or welded on site?
Cutting should be done with an abrasive saw or hydraulic shear – never use oxy-acetylene torch as heat damages mechanical properties. Welding is not recommended because high heat alters the high-carbon steel structure and reduces tensile strength. For field connections, use approved mechanical couplers or anchorages.
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HONORS AND QUALIFICATIONS
The company has sufficient inventory and complete varieties and specifications. Special materials and specifications are produced according to customer requirements and exported to Asia, the Middle East, Europe and other countries and regions. We have our own quality management systems: ISO9001, ISO14000, OHSAS18001 standards.
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Building 1, Wealth No.1 Plaza, Huaiyin District, Jinan City, Shandong Province, China
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