304 Stainless Steel Tension Spring

Solution

304 Stainless Steel Tension Spring is a premium-quality spring crafted from 304 stainless steel, offering superior corrosion resistance, high-temperature tolerance, and excellent mechanical strength. This spring is designed to handle tensile forces and provide consistent restoring force when stretched. Its outstanding durability makes it ideal for use in a wide range of industries, including automotive, electronics, industrial machinery, and home appliances. The 304 stainless steel material ensures long-lasting performance, even in harsh environments with exposure to moisture, chemicals, and extreme temperatures. Whether for standard or custom applications, this tension spring offers reliable performance and versatility across various demanding applications.

Features

1. Corrosion Resistance: Made from ASTM A313 304 stainless steel, it offers exceptional resistance to oxidation and chemical corrosion, with a chromium content of 18-20% and nickel content of 8-10.5%, ensuring longevity in humid or acidic environments (pH resistance range: 2-12).

2. High Tensile Strength: The spring exhibits a tensile strength of ≥515 MPa and a yield strength of ≥205 MPa, enabling it to withstand dynamic loads up to 90% of its maximum deflection without permanent deformation.

3. Temperature Stability: Operates reliably in temperatures ranging from -200°C to +290°C, maintaining spring constant (k-value) variations within ±5% across this range, ideal for thermal cycling applications.

4. Precision Elasticity: Manufactured with a wire diameter tolerance of ±0.02mm and pitch accuracy of ±2%, delivering consistent force rates (0.5-50 N/mm) with hysteresis losses below 3% after 100,000 cycles.

5. Surface Finish: Features a polished surface with Ra ≤0.8μm, reducing friction coefficient to 0.15-0.25 and minimizing wear on mating components.

6. Electrical Conductivity: Demonstrates volume resistivity of 0.73 Ω·m, making it suitable for applications requiring moderate EMI shielding while maintaining non-magnetic properties (relative permeability: 1.02).

Applications

• Automotive Industry – Used in suspension systems, clutch mechanisms, and brake assemblies due to their corrosion resistance and durability under high stress.

• Medical Equipment – Ideal for surgical tools, dental devices, and hospital beds because of their hygienic properties and resistance to sterilization processes.

• Aerospace & Defense – Employed in landing gear, control systems, and safety mechanisms where reliability and resistance to extreme conditions are critical.

• Industrial Machinery – Applied in conveyor systems, valves, and actuators to maintain consistent tension and withstand harsh environments.

• Consumer Electronics – Used in keyboards, hinges, and battery contacts for their precision and long-lasting performance.

• Marine Applications – Suitable for boat rigging, dock equipment, and underwater instruments due to their excellent saltwater corrosion resistance.

FAQ

Q: What is a 304 Stainless Steel Tension Spring?

A: A 304 stainless steel tension spring is a helical spring designed to resist stretching forces. Made from 304-grade stainless steel, it offers excellent corrosion resistance and durability, making it ideal for harsh environments.

Q: What are the key properties of 304 stainless steel in springs?

A: 304 stainless steel provides high tensile strength, good formability, and resistance to oxidation. Its 18-8 chromium-nickel composition ensures longevity in moist or chemical-exposed applications.

Q: Where are 304 stainless steel tension springs commonly used?

A: These springs are widely used in marine equipment, medical devices, food processing machinery, and automotive components due to their rust-proof nature.

Q: How do you calculate the load capacity of a tension spring?

A: Load capacity depends on wire diameter, coil diameter, and material properties. The formula: F = (G × d⁴) / (8 × D³ × N), where G = modulus, d = wire size, D = mean coil diameter, N = active coils.

Q: Can 304 stainless steel tension springs withstand high temperatures?

A: Yes, they maintain functionality up to 870°C (1600°F) intermittently and 425°C (800°F) continuously, though prolonged heat may reduce spring rate.