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Help CenterSteel Wire & Electro Galvanized Wire，Q195、Q235、Q235B、SWC、SWP-B
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1. Basic Product Definition
Steel wire is a thin metal wire processed by cold drawing of high-quality steel wire rod. It features uniform diameter, smooth surface, stable tensile strength and good flexibility. Widely used in construction, wire mesh, binding, fencing, cable, hardware processing and other industries.
Common Grade Marking
Q195 / Q235: Low carbon steel wire (binding wire, galvanized wire)
45# / 60# / 65# / 70#: Medium & high carbon steel wire (spring wire, steel wire for rope)
Low alloy wire: For high-strength construction use
2. Applicable Standards
National Standard: GB/T 343-2012 Cold Drawn Low Carbon Steel Wire
GB/T 4357-2018 Carbon Steel Wire for Springs
International standards: ASTM A510, EN 10218, JIS G3532
3. Specification Parameters
Nominal Diameter (mm)
0.3mm, 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.6mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm, 10mm
Delivery Form
Small coils: 10–25kg per coil
Large industrial coils: 500–1000kg per coil
Straight cut wire: Custom fixed lengths as customer request
Surface Types
Black annealed wire: Black oxide surface, soft texture, low price
Electro-galvanized wire: Thin zinc coating, anti-rust for indoor use
Hot-dip galvanized wire: Thick zinc layer, excellent corrosion resistance for outdoor & marine environment
PVC coated wire: Plastic covered layer, anti-corrosion & insulation
4. Material & Chemical Composition
Low Carbon Steel Wire (Main Construction Grade)
C: ≤0.12%–0.22%, Si≤0.30%, Mn≤0.50%, S≤0.050%, P≤0.045%Low carbon content brings outstanding ductility, easy bending, twisting and binding.
High Carbon Steel Wire
C: 0.40%–0.75%, higher tensile strength, used for steel wire rope, spring, prestressing wire.
5. Core Mechanical Properties
Low carbon annealed wire: Tensile strength 300–500MPa, super soft, easy manual binding
Hot-dip galvanized wire: Tensile 350–550MPa, good zinc adhesion
High carbon hard wire: Tensile ≥1200MPa, high elasticity, wear-resistant
6. Complete Production Process
Raw wire rod → Pickling & rust removal → Water washing → Drying → Cold drawing multiple times → Annealing (soft wire) / Galvanizing treatment → Coiling → Inspection & Packaging
7. Product Classification
By Carbon Content
Low carbon steel wire (mild steel wire): Binding wire, mesh wire, fencing wire
Medium carbon steel wire: Hardware wire, nail wire
High carbon steel wire: Spring wire, steel cable wire, prestressed steel wire
By Surface Treatment
Black annealed wire
Electro galvanized wire
Hot dipped galvanized wire
PVC coated wire
Bright polished wire
By Usage
Construction binding wire, welded mesh wire, barbed wire, steel wire rope, spring wire, nail wire, hanger wire
8. Product Advantages
Stable dimension: Uniform diameter, small tolerance
Good plasticity: Low carbon wire can be bent, twisted and knotted without fracture
Multiple anti-rust options: Galvanized & PVC coating available for long service life
Complete specifications: Cover ultra-thin to thick diameter to meet different engineering demands
Export available with full inspection certificates, shipped from Tianjin Port
9. Main Application Fields
Construction industry: Binding steel rebar, wire mesh making, temporary building fixing
Fencing & agriculture: Farm fence, poultry net, garden boundary
Hardware processing: Nails, springs, hangers, craft metal products
Cable & marine: Steel wire rope, marine anti-corrosion net
Daily use: Packaging binding, handicraft weaving
10. Surface Quality & Packaging
Surface Standard
Uniform diameter, no crack, scratch, burr or broken wire; zinc coating evenly distributed without peeling; annealed wire soft without brittle fracture.
Packaging
Small coil: Plastic film wrapped, woven bag outside, labeled with specification, weight, batch number
Large industrial coil: Steel strip bundled, waterproof plastic cloth covered for sea shipment
Export package: Can add moisture-proof agent to avoid rust during long-distance transportation
11. Delivery Information
Loading Port: Tianjin Port, Lead Time: 5–7 working days
Payment Term: 30% TT deposit + 70% balance against BL copy
Supporting Documents: Mill Test Certificate, Inspection Report, CO/FTA Certificate of Origin available
Quality Warranty: Strict factory inspection; replace unqualified goods free of charge
12. Storage & Usage Notes
Store in dry warehouse, avoid damp ground and rain to prevent rust
Galvanized wire should avoid long-term contact with acid liquid
High carbon hard wire cannot be bent sharply to prevent breakage
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