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Help CenterSteel Wire & Steel Wire In Stock，Q195、Q235、45#、65#、70#、SWRH72A
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Product Overview
Steel wire is a linear metal product manufactured from hot-rolled wire rods through multiple cold drawing and heat treatment processes. It is mainly round in cross-section, with various special-shaped types available. The diameter ranges widely from 0.01mm to 20mm, serving as a fundamental material in the iron and steel industry. Delivery cycle: 5-7 working days.
Core Classification (In accordance with GB/T 341-2008)
1. By Chemical Composition (Carbon Content)
Low Carbon Steel Wire (C≤0.25%): Soft and tough, easy for processing. Widely used for binding wire, nail making, wire mesh and packaging.
Medium Carbon Steel Wire (C 0.25%～0.60%): Medium tensile strength, applied for ordinary springs, mechanical parts and shaft components.
High Carbon Steel Wire (C≥0.60%): High strength and high hardness, suitable for string instruments, tire cord, steel wire rope and industrial springs.
Alloy Steel Wire: Containing Cr, Ni, Mo and other alloy elements, including stainless steel wire, bearing steel wire and spring alloy steel wire, applicable to corrosion-resistant, high-temperature resistant and high fatigue working conditions.
2. By Cross Section Shape
Round Steel Wire: The most common type, mainstream diameter: 0.1～10mm.
Special-Shaped Steel Wire: Square, rectangular, flat, triangular, trapezoidal, Z-shape and other profiles, used for special structural parts such as springs, lock cores and conveyor belts.
3. By Diameter Size
Extra Fine: ＜0.1mm (micro wire, electronic industry usage)
Fine: 0.1～1.5mm
Medium: 1.5～3.0mm
Coarse: 3.0～6.0mm
Extra Coarse: ＞6.0mm
4. By Surface Treatment
Bright Steel Wire: Non-plated with original metallic luster, for general industrial use.
Galvanized Steel Wire: Hot-dip galvanized (thick zinc layer, superior corrosion resistance, outdoor application); Electro-galvanized (thin zinc layer, high precision, for electronic and daily necessities).
Copper/Nickel/Tin Plated Steel Wire: Improve electrical conductivity and weldability, used for cables and electronic components.
PVC/PE Coated Steel Wire: Outer layer coated with PVC/PE material, featuring insulation, anti-corrosion and wear resistance, ideal for fences and protective nets.
5. By Tensile Strength (MPa)
Low Strength: ＜390
Normal Strength: 785～1225
High Strength: 1960～3135
Ultra-High Strength: ＞3135 (prestressed steel wire, aviation special wire)
Manufacturing Process
Raw Material: Hot-rolled wire rod (diameter 5.5～14mm), common grades: Q195, Q235, 45#, 65#, 70#, SWRH72A.
Pickling: Remove surface oxide scale with hydrochloric acid or sulfuric acid.
Cold Drawing: Gradual diameter reduction through wire drawing dies at room temperature to enhance strength and surface finish.
Heat Treatment:
Annealing: Soften material and improve ductility (for low carbon steel wire).
Lead Patented / Oil Tempered: Strengthen high carbon steel wire to obtain high tensile strength and toughness (for springs and steel wire ropes).
Surface Treatment: Galvanizing, copper plating, plastic coating and other customized treatments.
Inspection & Packaging: Test mechanical properties, dimension tolerance and surface quality strictly, delivered in coil or straight bar form.
Key Performance Parameters
Diameter Tolerance: Precision wire ±0.01mm, standard wire ±0.1mm.
Tensile Strength: Low carbon wire 300～500MPa, high carbon spring wire 1500～2500MPa.
Elongation: Low carbon wire ≥10%, high carbon wire 3%～8% (higher strength with lower plasticity).
Bending & Torsion Times: Reflect material toughness; nail-making wire ≥10 bending times.
Coating Weight: Hot-dip galvanized ≥200g/㎡, electro-galvanized 5～50g/㎡.
Common Specifications & Applications
1. Low Carbon Steel Wire (Q195/Q235)
Specification: Φ0.5～6.0mm
Application: Binding work, nail making, wire mesh, hanger, packaging and gardening.
2. Galvanized Steel Wire
Specification: Φ1.0～8.0mm
Application: Fence, protective net, communication cable, steel wire rope core and greenhouse frame.
3. High Carbon Spring Steel Wire (65#/70#/SWRH72A)
Specification: Φ0.8～8.0mm
Application: Automobile springs, mechanical springs, mattress springs and steel wire ropes.
4. Prestressed Steel Wire
Specification: Φ4.0～7.0mm, strength 1570～1860MPa
Application: Bridges, high-rise buildings, railway sleepers and concrete pipe piles.
Executive Standards
GB/T 341-2008 Classification and Terminology of Steel Wire
GB/T 3428-2012 Galvanized Steel Wire for General Purpose
GB/T 4357-2009 Carbon Spring Steel Wire
GB/T 5223-2014 Prestressed Steel Wire for Concrete
Difference Between Steel Wire and Iron Wire
Steel Wire: Carbon content ≥0.0218%, can be strengthened by heat treatment, high strength and good toughness, used for industrial and high-end fields.
Iron Wire: Extremely low carbon content (≤0.0218%), soft texture and low strength, mainly used for nails, paper clips and simple fences.
Purchase Guidelines
Select proper material according to actual application: low carbon / high carbon / alloy / stainless steel.
Balance tensile strength and toughness; choose high carbon or alloy wire for high strength demand, low carbon wire for bending and processing demand.
Adapt to service environment: hot-dip galvanized for outdoor and humid environment, copper/tin plated for electronic industry, stainless steel for severe corrosion environment.
Choose tight tolerance, bright or electroplated wire for precision mechanical parts.
Delivery Note: All steel wire products can be shipped within 5-7 days after order confirmation.
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