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Help CenterSteel Wire， Low Carbon Steel Wire (Mild Steel Wire) - Representative Grades: Q195, Q215, Q235, SAE1008, SWRM6, SWRM8
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Steel Round Bar＆Round Bar，Q195, Q235, 20#, S20C, 1020，35#, 45#, S45C, 1045，40Cr, 42CrMo, 20CrMnTiNegotiableMOQ: 5 Metric Tons -
Steel Round Bar＆Round Bar，Q195, Q235, 20#, S20C, 1020，35#, 45#, S45C, 1045，40Cr, 42CrMo, 20CrMnTiNegotiableMOQ: 3 Metric Tons
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Steel Round Bar＆Round Bar，Q195, Q235, 20#, S20C, 1020，35#, 45#, S45C, 1045，40Cr, 42CrMo, 20CrMnTiNegotiableMOQ: 5 Metric Tons
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Steel Round Bar＆Round Bar，Q195, Q235, 20#, S20C, 1020，35#, 45#, S45C, 1045，40Cr, 42CrMo, 20CrMnTiNegotiableMOQ: 5 Metric Tons
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Steel Round Bar＆Round Bar，Q195, Q235, 20#, S20C, 1020，35#, 45#, S45C, 1045，40Cr, 42CrMo, 20CrMnTiNegotiableMOQ: 5 Metric Tons
Complete Product Description of Steel Wire
1. Product Overview
Steel wire is manufactured from premium steel wire rods through multiple precise processes including pickling, phosphating, cold drawing, heat treatment and surface coating. Round cross-section is standard, while flat, square and special-shaped profiles can be customized. Classified by carbon content, material grade and surface treatment, steel wire features high tensile strength, excellent elasticity, corrosion resistance and easy forming. It is widely applied in construction, engineering machinery, automobile, hardware, bridge, marine, electronics and other industrial sectors.
2. Main Grades by Material
(1) Low Carbon Steel Wire (Mild Steel Wire)
- Representative Grades: Q195, Q215, Q235, SAE1008, SWRM6, SWRM8
- Carbon Content: ≤0.25%, soft texture, easy bending and welding
- Diameter Range: 0.1mm – 12mm
- Surface Treatment: Bright black wire, electro-galvanized, hot-dip galvanized, PVC coated
- Mechanical Property: Tensile strength 300–800MPa, superior ductility
- Applications: Construction binding wire, welded wire mesh, nails, fencing, packaging wire, breeding cages
(2) High Carbon Steel Wire (Spring & Prestressed Wire)
- Representative Grades: 65Mn, 70#, 80#, SWRH72A, SWRH82B, 60Si2MnA
- Carbon Content: 0.6% – 0.92%, high strength and outstanding rebound elasticity
- Diameter Range: 0.2mm – 16mm
- Heat Treatment: Oil tempered, patenting, cold drawn hardening
- Tensile Strength: 1225–3100MPa, excellent fatigue and stress relaxation resistance
- Sub-categories
1. Carbon spring steel wire: General machinery springs, hardware shrapnel
2. Oil tempered wire: Automobile suspension springs, valve springs
3. Prestressed steel wire & strand: Bridges, viaducts, nuclear power, precast concrete components
4. Piano wire: Precision instruments, miniature high-strength springs
(3) Alloy Steel Wire
- Representative Grades: 50CrVA, 55CrSi, 54SiCr6, 20CrMnTi
- Alloy Elements: Chromium, Vanadium, Silicon, Manganese for enhanced wear resistance, high-temperature stability and fatigue life
- Advantages: No deformation under high temperature, ultra-low stress relaxation, longer service life than ordinary high carbon wire
- Applications: Auto shock absorber springs, engine valve springs, heavy-duty engineering machinery, bearing accessories
(4) Stainless Steel Wire (Anti-corrosion & High Temperature Resistant)
- Common Grades
201/202: Cost-effective, basic rust prevention, daily-use springs
304: General anti-corrosion grade, household appliances, wire mesh, mild acid & alkali environments
316/316L: Marine & chemical grade, resistant to seawater and strong corrosive media
410/430: Ferritic stainless steel, cutlery, fasteners
- Diameter Range: 0.05mm – 10mm, bright drawn, matte, electrolytic polished surface available
- Features: Rust-free, temperature resistant, non-magnetic option available
- Applications: Marine aquaculture, chemical filter mesh, medical devices, sanitary springs, precision electronics
3. Surface Treatment & Characteristics
1. Bright Black Cold Drawn Wire
No coating, lowest cost. For indoor secondary processing; prone to rust, mainly used for nail making and further wire drawing.
2. Electro-galvanized Steel Wire
Thin zinc coating, glossy surface, salt spray resistance 24–72 hours. Cost efficient for wire mesh, binding and general hardware.
3. Hot-dip Galvanized Steel Wire
Thick and firmly adhered zinc layer, salt spray resistance over 200 hours. Ideal for long-term outdoor anti-corrosion: fencing, bridges, marine and mining projects.
4. Phosphated Steel Wire
Lubricating phosphate film for spring coiling, reduces die wear and improves coating adhesion.
5. Oil Tempered & Bluing Wire
Specially for high carbon spring wire, anti-rust and stable elasticity, for automobile and heavy-duty springs.
6. PVC/PE Coated Steel Wire
Plastic outer layer with insulation and full corrosion resistance, for gardening, breeding cages and safety fencing.
4. Standard Specifications
Diameter Classification
- Micro wire: ≤0.10mm (precision electronics, instruments)
- Fine wire: 0.1–0.5mm (mini springs, filter mesh)
- Medium fine wire: 0.5–3.0mm (hardware, home appliances)
- Heavy wire: 3.0–16.0mm (prestressed components, heavy springs, steel wire ropes)
Executive Standards
National Standard: GB/T343, GB4357, GB/T5223, GB/T20118
International Standards: ASTM A228/A229, EN10270, JIS G3560, BS series
Certifications: SGS, CE, ISO. Material test certificates and third-party inspection reports are available.
Tensile Strength Grades
- Low strength: ＜390MPa (mild binding wire)
- Medium strength: 785–1225MPa (welded mesh, standard fasteners)
- Medium-high strength: 1225–1960MPa (general springs)
- High strength: 1960–3135MPa (prestressed wire, piano wire, hoisting ropes)
5. Production Process
Raw steel wire rod incoming → Descaling by pickling → Phosphating & lubrication → Multi-pass cold drawing → Precise heat treatment (annealing / quenching & tempering) → Surface galvanizing / polishing / plastic coating → Online inspection of dimension, tensile force & torsion → Coiling / spool packing → Warehouse delivery
6. Product Advantages
1. High dimensional accuracy: Diameter tolerance ±0.01~±0.05mm, strict ovality control for consistent assembly performance
2. Stable mechanical performance: Temperature-controlled heat treatment refines grain structure with uniform torsion, bending and tensile indicators
3. Long service life: Alloy & high carbon grades withstand millions of fatigue cycles; galvanized versions offer 5–15 years outdoor anti-rust lifespan
4. Excellent machinability: Suitable for bending, stamping, spring coiling, welding, weaving and wire rope twisting
5. Flexible customization: Customizable diameter, material grade, coating, length, cross-section and packaging
6. Stable supply: Monthly output in thousand tons, stock items delivered within 5–7 working days; bulk order lead time negotiable
7. Packaging & Logistics
Packaging Types
- Large coils: 50–1000kg per coil, wrapped with waterproof paper & woven bag, fixed with steel strips
- Plywood spools: 100–2000 meters per spool, dedicated for export
- Small bundles: 20–50kg per bundle, for small-batch retail orders
Shipping Ports
Qingdao Port, Shanghai Port, Tianjin Port. Trade terms: FOB, CIF, EXW acceptable.
Moisture & Rust Protection
Inner waterproof kraft paper, outer stretch film wrapping, anti-rust and moisture-proof for ocean transportation.
8. Wide Application Fields
1. Construction Industry: Binding wire, prestressed steel wire, bridge strand, safety mesh, welded wire mesh
2. Automobile Industry: Suspension springs, valve springs, seat wire, brake components, tire cord wire
3. Daily Hardware: Compression/torsion/tension springs, nails, hooks, kitchen fittings
4. Marine & Mining: Hot-dip galvanized wire rope, aquaculture mesh, mine support, lifting slings
5. Chemical & Environmental Protection: 304/316 stainless steel filter mesh, anti-corrosion filter wire
6. Precision Electronics & Medical Equipment: Micro piano wire, instrument shrapnel, medical grade wire
7. Agriculture & Gardening: PVC coated fencing wire, fruit tree binding wire, breeding cage mesh
9. After-sales & Quality Assurance
1. Material certificates, tensile & torsion test reports provided with each shipment
2. Free return & replacement if dimensions or mechanical properties fail to meet standards
3. Complete customs documents, commodity inspection and EAC certification available for export orders
4. Custom service for special grades, special profiles and customized coatings based on customer samples
Short SEO Version for B2B Website
Steel wire is cold drawn metal wire processed from high-quality steel rod via pickling, phosphating, heat treatment and galvanizing. We supply low carbon, high carbon, alloy and stainless steel wire in round and special profiles.
Diameter: 0.05mm–16mm
Surface Finish: Bright, electro galvanized, hot dipped galvanized, phosphated, PVC coated
Tensile Strength: 300–3135MPa
Compliance: GB, ASTM, EN, JIS, BS, ISO & SGS certified
Applications: Construction binding, spring manufacturing, prestressed bridge strand, wire mesh, auto suspension, marine anti-corrosion, medical & electronic parts
Package: Waterproof coils & plywood reels, FOB Qingdao Port, 5–7 days lead time for stock goods.
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