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Help CenterSteel Wire & Binding Wire，Q195、Q235、65#、70#、82B、60Si2Mn、50CrVA
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1. Product Overview
Steel wire is linear metal profile produced by multi-pass cold drawing, heat treatment and surface coating deep processing based on hot rolled wire rod. Classified by carbon content into low-carbon, medium-carbon and high-carbon steel wire, with multiple surface treatments including black annealing, electro-galvanizing, hot-dip galvanizing, PVC coating and phosphating. It features high dimensional accuracy, graded mechanical properties, excellent flexibility, high tensile strength, corrosion resistance and easy bending & weaving performance. Widely used in construction binding, wire mesh manufacturing, springs, prestressed engineering, steel wire ropes, hardware, agriculture and cable armoring. Compliant with domestic special steel wire standards and mainstream European, American & Japanese export industrial standards, available in large coils, small coils, spools and straight cut lengths.
Applicable Standards
Domestic StandardsGB/T 341 Classification and Terminology of Steel Wires, GB/T 343 Low Carbon Steel Wires, GB/T 4357 Carbon Spring Steel Wires, GB/T 5223 Steel Wires for Prestressed Concrete, GB/T 15393 Galvanized Steel Wires
International Export StandardsEN 10270, ASTM A227/A228/A475, JIS G3532, ISO 16150
2. Main Material Grades & Application Conditions
2.1 Low Carbon Steel Wire (Q195/Q235, C≤0.25%)
Excellent plasticity, easy bending & welding with low cost, including black annealed wire, bright cold drawn wire and galvanized wire. For construction binding wire, wire mesh, baling wire, gardening tie wire and craft products.
2.2 Medium Carbon Steel Wire (45#, 55#, C 0.25%~0.60%)
Balanced strength and toughness, suitable for mechanical fasteners, cold heading screws, medium-load springs and agricultural machinery parts.
2.3 High Carbon Steel Wire (65#, 70#, 82B, C≥0.60%)
Ultra-high tensile strength and fatigue resistance. After oil tempering, used for industrial springs, steel wire ropes, steel strands, prestressed steel wires and tire cords.
2.4 Alloy Steel Wire (60Si2Mn, 50CrVA)
High temperature resistance, fatigue resistance and wear resistance, for heavy machinery springs, automotive suspension springs and construction machinery elastic components.
3. Surface Treatment Types
Black Annealed Wire: No coating, softened by annealing, low cost for temporary construction binding
Bright Cold Drawn Wire: Free of oxide scale, bright natural surface, for welded wire mesh and crafts
Electro-Galvanized Wire (EGI): Zinc coating 15–60g/㎡, for dry indoor environments, wire mesh and weaving
Hot-Dip Galvanized Wire (HGI): Zinc coating 60–280g/㎡, for outdoor, coastal and chemical high-corrosion areas
PVC Coated Wire: Galvanized base wrapped with plastic layer, anti-corrosion & insulation, for breeding fences and garden protection
Phosphated Wire: Lubricating & anti-rust, dedicated for cold processing of springs and fasteners
4. Complete Production Process
Incoming inspection of hot rolled wire rod → Mechanical descaling & rust removal → Acid pickling for oxide elimination → Water washing & neutralization → Phosphating & lubrication → Multi-pass cold drawing to target wire diameter → Heat treatment (annealing / oil tempering / stabilization) → Surface galvanizing / PVC coating / passivation → On-line inspection of dimension, tensile strength & torsion → Coiling (large coil / small coil / spool) → Marking & coding → Waterproof packaging & warehousing
5. Core Specification & Technical Parameters
Wire Diameter Range: 0.10mm～12.0mm, covering precision fine wire, general binding wire and high-strength industrial wire
Diameter Tolerance: ±0.02~±0.08mm, customized ±0.01mm tolerance for precision spring wire
Standard Coil Weight
Large coil: 500–1000kg per coil
Small coil: 1–50kg per coil
Spool: 5–200kg per spool
Straight cut: Custom fixed length 1–6m
Mechanical Performance Grades
Low carbon wire: Tensile strength 300–550MPa, elongation 10%–30%, hard to crack after repeated bending
Medium carbon wire: Tensile strength 600–1000MPa, balanced strength and formability
High carbon prestressed / spring wire: Tensile strength 1270–2160MPa, high torsion resistance and long fatigue life
Zinc Coating IndexElectro-galvanized 15–60g/㎡; hot-dip galvanized ≥120g/㎡, no rust after 500–1500h neutral salt spray test
FormabilityAnnealed wire supports repeated bending, winding and weaving; oil-tempered high carbon wire can be coiled into springs without cracking or wire breakage
6. Core Product Advantages
Complete specification system covering all industriesWide range from 0.1mm ultra-fine wire to 12mm heavy high-strength wire, customized material, coating and packaging available.
Ultra-high dimensional precision & stable surface qualityPrecision drawing dies control diameter, free of burrs, scratches and oxide scale, low processing loss for weaving and spring production.
Multi-grade anti-corrosion solutions for all corrosive environmentsMultiple options including bare, electro-galvanized, hot-dip galvanized and PVC coated, matching indoor, outdoor, coastal and chemical plant conditions.
Clearly graded mechanical properties for easy material selectionLow carbon for flexibility, medium carbon for balance, high carbon for high strength, dedicated performance for springs, prestress and wire ropes.
Excellent machinabilitySuitable for bending, winding, welding, cold heading, weaving and spring coiling, compatible with automatic wire mesh and spring production lines.
Sufficient Stock & Stable Delivery CycleFull series of materials and diameters in stock, shipped directly from Tianjin Port, production & delivery cycle 5–7 days. Custom spools, straight cut lengths, heavy zinc coating and color PVC coating available for bulk orders.
7. Main Application Fields
Construction Engineering: Steel bar binding wire, scaffolding fixing wire, baling wire, raw material for floor heating mesh
Wire Mesh Manufacturing: Welded mesh, chain link mesh, gabion mesh, safety fence, breeding net, guardrail mesh
Spring Industry: Mechanical springs, automotive springs, precision instrument springs, stationery springs
Prestressed Engineering: Prestressed steel wire and strand raw material for bridges, factory buildings and floor slabs
Steel Wire Rope & Cableway: Lifting wire rope, cableway, armoring wire for submarine cables
Hardware Fasteners: Cold heading screws, rivets, chains, blanks for hardware stamping parts
Agriculture & Horticulture: Greenhouse tie wire, fruit tree binding, breeding fences, livestock protection
Communication & Transportation: Cable armoring, road isolation guardrails, trailer binding, bridge protection
8. Factory Inspection & Complete Qualification Documents
Full inspection for every coil per batch with complete export supporting documents:
Dimensional inspection of wire diameter, appearance, coil weight and straightness
Mechanical test including tensile strength, elongation, repeated bending and torsion
Zinc coating weight, adhesion and neutral salt spray anti-corrosion test
Spectral chemical composition analysis
Original Mill Test Certificate EN 10204 3.1, factory certificate, SGS third-party inspection report, CE certification documents
9. Packaging, Marking & Logistics Delivery
Packaging
Large coils: Bundled with steel strips and wrapped with inner waterproof plastic film;
Small coils: Separated in woven bags / cartons;
Export spools: Fixed on wooden frames with waterproof film to avoid collision damage;
Straight cut wire: Bundled on wooden pallets with end protection caps.
MarkingPermanent printing on coil / carton including material grade, wire diameter, surface treatment, tensile grade, heat number, weight and execution standard; product qualification label attached to each coil.
DeliveryDirect shipment from warehouse to Tianjin Port, suitable for 20GP/40HQ full containers and bulk carriers; delivery cycle 5–7 days, full container & LCL export supported, FOB/CIF/CFR trade terms acceptable.
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