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Oil-Tempered Steel Volute Spring, 300-800 N/mm Spring Rate, for Automotive Suspension Systems
Product Spotlights
Our oil-tempered steel volute springs offer a progressive spring rate (300-800 N/mm) for superior automotive suspension performance. Customizable dimensions, fatigue-tested durability, and corrosion-resistant finishes. With 25+ years of manufacturing expertise and annual exports of US$5-10 million, we provide reliable, cost-effective solutions for global automotive applications.
Negotiable
MOQ: 1 Piece (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Material:
Other, Oil-Tempered Steel
Spring Rate:
300-800 N/mm
Type:
Volute Spring
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, Oil-Tempered Steel
Spring Rate
300-800 N/mm
Type
Volute Spring
Application
Automotive Suspension Systems
Surface Treatment
Black Oxide / Oil Coated (optional)
Wire Diameter
Customizable (upon request)
Coil Diameter
Customizable (upon request)
Free Length
Customizable (upon request)
End Type
Closed & Ground / Open (optional)
Packaging
Polybag + Carton + Pallet (or as required)
Anping County Boli Hardware Wiremesh Products Factory has been a trusted manufacturer in the steel spring industry since 1998. Our Oil-Tempered Steel Volute Spring with a spring rate range of 300–800 N/mm is specifically engineered for demanding automotive suspension applications. By combining precision manufacturing with high-grade oil-tempered steel, we deliver consistent performance, fatigue resistance, and long service life. This product is designed to meet the rigorous requirements of both OEM and aftermarket markets, ensuring vehicle stability and ride comfort.
Our volute springs undergo strict quality control processes to guarantee uniform dimensions and reliable spring characteristics. The oil-tempered steel material provides excellent tensile strength and durability, while the volute (conical) shape offers progressive spring rate behavior — ideal for absorbing shocks and maintaining proper ride height. With annual export value exceeding US$5 million, our springs are shipped to major markets worldwide, including North America, Europe, Southeast Asia, and the Middle East.
Key Features & Technical Specifications
- Material: High-grade oil-tempered steel (SAE 9254 / 50CrVA equivalent) – ensures high fatigue strength and resistance to sagging.
- Spring Rate: Ranges from 300 N/mm to 800 N/mm, customizable per application requirements.
- Volute (Conical) Design: Provides progressive spring rate – softer initial compression with increasing stiffness, preventing bottoming out.
- Surface Finish: Standard black oxide or oil coating for corrosion resistance; other options (e.g., powder coating, zinc plating) available upon request.
- Precision Manufacturing: CNC coiling and heat treatment ensure consistent parameters within tight tolerances.
- Fatigue Life: Tested for over 200,000 cycles under normal load conditions.
- Customizable Dimensions: Wire diameter, coil diameter, free length, and number of coils can be tailored to your suspension system.
| Parameter | Value / Range |
|---|---|
| Material | Oil-Tempered Steel (SAE 9254 / 50CrVA) |
| Spring Rate | 300 – 800 N/mm |
| Wire Diameter | Customizable (typical: 10–20 mm) |
| Outer Diameter (max) | Customizable (typical: 100–250 mm) |
| Free Length | Customizable (typical: 200–500 mm) |
| Surface Treatment | Black Oxide / Oil Coating (standard); Powder coating, E-coat, Zinc plating (optional) |
| End Type | Closed & Ground / Open ends (customizable) |
| Packaging | Polybag + Carton + Pallet, or as per customer requirement |
Advantages & Customer Benefits
- Progressive Spring Rate: The volute design ensures a smooth ride under normal conditions and increased stiffness to prevent bottoming out during heavy loads or off-road use.
- Enhanced Durability: Oil-tempered steel offers superior resistance to fatigue and permanent set, extending the spring's service life even in harsh environments.
- Excellent Corrosion Resistance: Standard oil coating protects against moisture and road salts; additional surface treatments available for extreme conditions.
- Precision Fit: Customizable dimensions allow direct replacement for OEM parts or integration into new suspension designs.
- Cost-Effective: As a direct manufacturer, we offer competitive pricing without compromising quality, with flexible MOQ options.
- Global Shipping: We ship from multiple ports (Tianjin, Qingdao, Shanghai) with reliable logistics partners to ensure timely delivery worldwide.
Why Choose Anping County Boli Hardware Wiremesh Products Factory?
With over 25 years of manufacturing experience (since 1998), we have built a strong reputation for producing high-quality springs and wire products. Our annual export value of US$5 million – US$10 million reflects the trust our global customers place in our products. We serve a wide range of markets including North America, South America, Europe, Southeast Asia, Africa, the Middle East, and Oceania. Our dedicated quality control team inspects every batch to ensure compliance with international standards. We are not just a supplier; we are your long-term partner in suspension solutions.
We invite you to contact us for a quote or technical consultation. Whether you need a standard volute spring or a custom-engineered solution, we are ready to support your project with competitive pricing, fast lead times, and reliable after-sales service. Let us help you achieve optimal suspension performance.
Frequently Asked Questions (FAQ)
-
Q: What is the typical lead time for custom oil-tempered volute springs?
A: For standard sizes, lead time is 2–3 weeks. Custom orders may require 3–5 weeks depending on design complexity and quantity. We can expedite rush orders upon request. -
Q: Can you produce springs with a specific spring rate outside the 300–800 N/mm range?
A: Yes, the 300–800 N/mm range covers our standard production capability. However, we can customize springs with rates outside this range by adjusting wire diameter, coil dimensions, and material. Please provide your requirements for a feasibility study. -
Q: What surface treatments are available for corrosion protection?
A: Our standard finish is black oxide with oil coating, suitable for most automotive environments. Optional treatments include powder coating, e-coating, zinc plating, and Dacromet. We recommend the best option based on your operating conditions. -
Q: Do you provide samples for testing before mass production?
A: Yes, sample orders are welcome. We can produce a small quantity (e.g., 5–10 pieces) for fitment and performance evaluation. Sample cost is negotiable, and it will be deducted from the final order quantity. -
Q: How do you ensure the quality of the springs?
A: We conduct in-process and final inspections including dimensional checks, load testing (spring rate verification), and fatigue testing on a random sample basis. Our quality system is based on years of experience and customer feedback. We also offer test reports upon request. -
Q: Can the springs be used in heavy-duty trucks or off-road vehicles?
A: Absolutely. The progressive rate of volute springs is particularly suitable for vehicles that experience varying loads, such as trucks, SUVs, and off-road vehicles. The oil-tempered steel provides the strength needed for high-stress applications. -
Q: What is the minimum order quantity (MOQ)?
A: For standard sizes, MOQ is typically 500 pieces. For custom designs, MOQ may be 1000 pieces. We can discuss smaller quantities for initial orders or prototyping. -
Q: Do you ship to my country? What are the shipping options?
A: We ship worldwide via sea, air, or express (DHL, FedEx, UPS). Our main ports are Tianjin, Qingdao, and Shanghai. We have experience exporting to all major markets, so we can handle documentation and customs clearance assistance.
Send Inquiry to This Supplier
Mr. Geng Xiaozhong
Sales Manager
2Yrs
Hengshui, Hebei, China
2Yrs
Business Type
Manufacturer
Year Established
1998
Annual Export Value
US$5 Million - US$10 Million
Product Certifications
Others
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