High-Carbon Spring Steel Wire – Precision Engineered for Elasticity and Endurance

Material Specifications

We offer spring steel wire in a variety of materials and finishes to suit specific engineering requirements. The wire is manufactured from high-quality steel rods such as 65Mn, 70#, 82B, and alloy grades, processed through advanced cold drawing and heat treatment techniques .

• Base Materials: High-Carbon Steel (65Mn, 70#, 72A, 82B), Alloy Steel (55CrSiA, 50CrVA), Stainless Steel (302, 304, 316, 631J1) .

• Tensile Strength: Ranges from 1000 MPa to 3000 MPa depending on the diameter, grade, and temper .

• Surface Finishes:

  • Bright (BR): Clean, smooth surface for general applications .

  • Galvanized: Zinc-coated for corrosion resistance in outdoor environments .

  • Phosphated: Features a phosphate coating that aids lubrication during spring coiling .

  • Oil Tempered (OT): Quenched and tempered for high fatigue life in valve spring and suspension applications .

Dimensional Range

Our spring steel wire is available in a wide spectrum of diameters to accommodate everything from micro-miniature springs to heavy-duty industrial stabilizers. We maintain tight tolerances (typically within ±0.02mm) to ensure consistency in high-speed automatic coiling machines .

• Diameter Range: 0.08 mm to 20.0 mm .

• Standard Tolerances: Available in standard commercial tolerances as well as precision ground tolerances for critical applications.

• Packaging Forms: Available in spools (for fine wires), carriers (for intermediate sizes), and coils (for larger diameters) to suit different feeding equipment .

• Cross-section: Primarily round, but custom shapes (flat, square, or oval) are available upon request .

Primary Applications

The versatility of spring steel wire makes it an essential component across multiple industries. Its ability to withstand repeated stress and resist deformation defines its use cases.

1. Automotive Industry

In the automotive sector, reliability is non-negotiable. Our wire is used to manufacture components that must endure constant vibration and high temperatures .

• Suspension Systems: Coil springs and stabilizer bars that support vehicle weight and absorb road shock .

• Engine Components: Valve springs requiring oil-tempered wire with high fatigue strength to operate at high cycles .

• Brake and Clutch Components: Return springs and pressure springs.

• Seating Mechanisms: Recline springs and lumbar support structures .

2. Furniture and Bedding

The furniture industry relies on spring steel wire for comfort and support structures .

• Mattress Core Units: Bonnell coils, pocket springs, and continuous coils made from high-carbon wire (often 70# or 82B) to withstand repeated compression (fatigue tested up to 50,000 cycles) .

• Sofa Suspension: Zig-zag (sinuous) springs and serpentine wire forms used in seat frames .

3. Industrial Machinery

Industrial applications demand springs that can exert precise force or absorb significant energy .

• General Spring Manufacturing: Compression springs, extension springs, and torsion springs for tools, clamps, and locking mechanisms .

• Heavy Machinery: Cushioning springs and vibration dampeners.

• Power Generation: Springs for safety valves and governors.

4. Medical and Precision Instruments

For sensitive environments, stainless steel spring wire (such as 304 or 316) is preferred for its corrosion resistance and non-magnetic properties .

• Surgical Tools: Spring-loaded clamps and cutting instruments.

• Medical Devices: Guidewires, clips, and precision springs for diagnostic equipment.

5. Construction and Infrastructure

• Wire Ropes and Bridges: High-tensile wire is stranded together to form cables for cranes, elevators, and suspension bridges .

• Concrete Prestressing: Used to impart compressive strength to concrete structures.

Quality and Standards

To ensure global compatibility and performance, our spring steel wire is manufactured to meet or exceed international standards.

• Carbon Steel: EN 10270-1, ASTM A227 (cold drawn), ASTM A228 (music wire), ISO 8458 .

• Alloy & Oil Tempered: EN 10270-2, ASTM A229 (oil tempered), ASTM A230 (valve spring quality) .

• Stainless Steel: EN 10270-3, ASTM A313, JIS G4314 .

Why Choose Our Spring Steel Wire?

• Consistent Mechanical Properties: Tight control over tensile strength and reduction of area ensures uniform pitch and free length in your finished springs .

• Superior Surface Quality: Defect-free surfaces eliminate stress risers that can lead to premature spring failure .

• Decoiling Efficiency: Precise cast and helix control prevents twisting and tangling during high-speed automatic forming .

Contact our sales team today to discuss your specific gauge requirements or to request a material test certificate.