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Help CenterSteel Wire & Bright Wire, Q195, Q215, Q235B, 45#, 60#, 65#, 70#, 75#
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1. Product Overview
Steel wire is one of the core deep-processed products among the four major steel categories (plate, pipe, section and wire). It is manufactured from hot-rolled wire rods through multi-pass cold drawing, heat treatment and surface coating processes. Featuring high dimensional accuracy and controllable mechanical properties, it serves as a fundamental industrial material widely applied in construction, industry, agriculture, transportation and precision manufacturing fields.
Core Production Process
Hot-rolled wire rod raw material → Pickling, phosphating and lubrication → Multi-pass cold drawing and diameter reduction → Annealing / oil tempering heat treatment → Surface galvanizing / polishing / PVC coating → Coiling / spool winding → Inspection, packaging and delivery
Delivery Cycle: 5-7 days
2. Executive Standards
Chinese National GB Standards
1. GB/T 341-2008 Steel wire classification and terminology 2. GB/T 4357 Carbon steel cold-drawn wires 3. GB/T 15393 Galvanized steel wires 4. GB/T 4358 Carbon steel spring wires 5. GB/T 5224 Prestressed steel wires
International General Standards
ASTM A227/A228 (American standard spring steel wire), EN 10218 (European standard), JIS G3521 (Japanese standard). Non-standard specifications can be customized according to customer drawings.
3. Complete Product Classification & Material Parameters
3.1 Classification by Material
1. Mild Low Carbon Wire (Ordinary Binding Wire)
- Material Grade: Q195, Q215, Q235B - Performance: Good plasticity, easy to bend and weld, low cost with low strength and soft state - Tensile Strength: 390–785MPa - Application: Construction binding wire, nail making, gardening binding, carton packaging, ordinary welded wire mesh weaving
2. High Carbon Hard Wire (Industrial Load-bearing / Spring Wire)
- Material Grade: 45#, 60#, 65#, 70#, 75#, SWRH45A/SWRH62A/SWRH72A - Performance: High strength, excellent elasticity, fatigue resistance and wear resistance with sorbitizing treatment - Tensile Strength: 1225–3135MPa - Application: Mechanical springs, steel wire ropes, screen meshes, prestressed components, tire beads, rope-making wires
3. Alloy Steel Wire
Alloyed with manganese, silicon, chromium and other elements, it features ultra-high wear resistance and fatigue resistance, suitable for high-end bearings, auto parts and heavy-duty industrial springs.
3.2 Classification by Surface Treatment
1. Black Annealed WireNo coating, with blackening and softening treatment. Suitable for binding and nail making in indoor dry environments with the most competitive price.
2. Hot-dip Galvanized WireThick zinc coating (80–280g/㎡) with excellent anti-corrosion performance, applicable for outdoor projects, agricultural greenhouses, fences and river protection works.
3. Electro-galvanized WireThin and uniform bright zinc layer (40–70g/㎡), widely used for hardware accessories, pull wires and small-sized wire meshes.
4. PVC Coated WireOuter plastic coating with anti-scratch, anti-rust and insulating properties, ideal for garden fences, breeding nets and isolation protection facilities.
5. Copper Coated WireExcellent electrical conductivity, used for welding wires, rubber reinforcement skeletons and communication cables.
3.3 Classification by Wire Diameter
Specification Classification |
Diameter Range (mm) |
Application Scenarios |
Ultra-fine Wire |
＜0.10 |
Precision instruments, textile industry, micro springs |
Fine Wire |
0.10–1.50 |
Filter meshes, crafts, electronic accessories |
Medium Wire |
1.50–3.00 |
Construction binding wire, nail making, ordinary wire meshes |
Thick Wire |
3.00–6.00 |
Springs, steel wire ropes, greenhouse frames |
Extra-thick Wire |
＞6.00 |
Prestressed components, heavy-duty machinery, mine rigging |
3.4 Classification by Section Shape
Round steel wire (universal mainstream type)
2. Special-shaped steel wire: square wire, flat wire, triangular wire, trapezoidal wire, Z-shaped wire (custom mold opening available)
4. Core Mechanical Properties
Tensile Strength: 390MPa～3300MPa (classified by material and heat treatment)
2. Elongation: Soft wire ≥10%, high carbon hard wire 3%–8%
3. Torsion Performance: Steel wires with diameter of 1–3mm can withstand 16–22 minimum torsion times without fracture
4. Dimensional Tolerance: Conventional ±0.02~±0.08mm, high precision up to ±0.01mm 5. Surface Requirements: Free of cracks, pitting, oxide scales, burrs and scratches; uniform coating without missing plating
5. Packing Method (Customizable)
Coil Pack (Tire Coil): 50–200kg per coil, wrapped with woven plastic cloth, standard for foreign trade
2. Spool Pack: 5–50kg per spool, suitable for automatic wire drawing and weaving equipment
3. Straight Cut Wire: Fixed lengths of 1m/2m/6m/12m, bundled and film-covered
4. Export Reinforcement: Steel strip packing, moisture-proof PE film, wooden/plastic pallets for moisture and corrosion resistance during sea transportation
6. Main Application Fields
Construction Industry: Reinforcement binding wire, welded wire mesh, embedded fixation, isolation guardrails
2. Industrial Manufacturing: Various springs, steel wire ropes, screen meshes, cold-headed screws and rivets, welding raw materials
3. Agriculture, Forestry and Animal Husbandry: Greenhouse construction, breeding fences, fruit tree binding, protective nets
4. Transportation and Communication: Optical cable reinforcement cores, overhead cables, bridge prestressed wires, automobile pull wires
5. Daily Hardware: Nail making, crafts, clothes hangers, wire mesh shelves
7. Storage, Transportation and Usage Notes
Storage: Store in dry and ventilated warehouses, avoid dampness and rain; keep galvanized wires away from acid and alkali chemicals. Reseal unused products with film to prevent oxidation and rust.
2. Transportation: Handle with care to avoid violent impact causing coating damage and wire deformation; reinforce pallets and adopt full moisture-proof packaging for sea freight.
3. Usage: Keep uniform tension during wire unwinding to avoid knotting and bending-induced stress fracture; avoid excessive cold bending of high-carbon hard wires to prevent cracking.
8. After-sales and Customization Services
Customizable material, wire diameter, zinc coating thickness, surface treatment, fixed length and special-shaped section as required;
Provide material certificates, mechanical performance test reports and export inspection certificates;
3. Payment Terms: 30% TT deposit, 70% balance against bill of lading copy, L/C is not acceptable;
4. Sufficient stock with stable 5-7 days delivery cycle.
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