Product Description: High Strength Parabolic Multi Leaf Springs for Light Commercial Vehicles
We are a leading leaf spring manufacturer specializing in high-strength and corrosion-resistant products for commercial vehicles. Our parabolic multi leaf springs are designed to enhance load capacity, stability, and driving comfort under heavy-duty conditions.
The full standardized production workflow is as below:
- Raw steel incoming inspection: chemical composition & hardness test to reject unqualified steel stock;
- CNC precise cutting according to original OEM dimension;
- High temperature hot rolling and arch forming to fix standard camber;
- Integral quenching and high temperature tempering heat treatment under constant temperature control to eliminate internal stress, prevent spring bending deformation under long heavy load;
- Edge deburring & surface polishing to remove sharp corners;
- Full immersion electrophoretic black coating, the coating layer tightly adheres to spring surface to block water, mud and corrosive chemical erosion.
product highlights:
- Premium Spring Steel Material: Manufactured using 50CrVA, 60Si2Mn, and other high-grade spring steels for durability.
- IATF16949 Certified Quality: Product meets international automotive industry quality standards with 100% inspection.
- OEM and ODM Services: Full customization support based on customer drawings, samples, or vehicle models.
- High Fatigue Resistance: Advanced multiple isothermal quenching and tempering process ensures extended service life.
- Large Inventory Capacity: Over 4,000 tons of stock available for rapid order fulfillment and delivery.
- Global Export Experience: Products exported to 50+ countries including Europe, North America, and Southeast Asia.
- Comprehensive Product Range: Includes heavy-duty, conventional, and parabolic leaf springs for trucks and trailers.
- Professional After-Sales Support: Dedicated teams provide consultation, order tracking, and technical solutions.
Export Standard Packaging Specification:
To avoid scratch, collision and moisture damage during long ocean transportation: Single piece leaf spring is wrapped with thick anti-scratch PE plastic film all over the surface to protect electrophoresis paint layer from abrasion. Every 2–4 pcs springs are bundled firmly with high-tensile steel strapping to prevent loose shift. Small batch sample orders adopt solid export plywood wooden case packaging with inner moisture-proof foam filling. Large bulk container order loads bundled springs onto heavy-duty galvanized steel pallet, fixed with steel belt around pallet, convenient for forklift loading and container stuffing, greatly lower damage risk in sea transit.
✔️ OEM Precision & Perfect Fit
✔️ High-Strength Construction
🏭 About the Manufacturer: Zhengzhou Haishuo Auto Parts
Zhengzhou Haishuo Auto Parts Co., Ltd. is located in Zhongmu County, Zhengzhou City, Henan Province, China, a core industrial base for commercial vehicle parts manufacturing. Officially established in August 2016, our factory has focused on the R&D, production, sales and international export of heavy-duty truck and trailer suspension chassis parts for many years. The factory covers an area of 3600 square meters, with a long-term standing inventory of more than 4000 tons of leaf springs and complete supporting accessories, realizing fast delivery of spot goods and stable mass production supply. We have complete production equipment and independent quality inspection procedures, cooperating with domestic high-quality steel mills for long-term raw material supply, ensuring stable product quality and qualified rate. Our products are exported to Southeast Asia, Africa, the Middle East, Eastern Europe, South America and other global markets, with stable repeat customer resources and good market reputation.
🛠️ Technical Specifications & Materials
We adopt high-quality raw materials from authoritative domestic steel mills, optional 52CrMoV4, 60Si2Mn and 55CrMn high-strength spring steel. All products undergo professional quenching and tempering heat treatment, matched with shot peening strengthening and electrophoretic black anti-rust coating. The salt spray resistance test reaches more than 300 hours, with CNC precision machining and 100% full-size inspection before delivery. All dimensions, camber and bearing capacity fully meet standard replacement requirements for heavy-duty truck working conditions.
✅ Why Choose Haishuo?
We support factory direct sales to eliminate middleman premiums. With sufficient stock inventory and standardized production processes, we can meet both small-batch trial orders and large-batch bulk orders. Strict fatigue resistance treatment effectively avoids cracking, deformation and sagging during long-term heavy-load operation. The product retains consistent installation hole positions and overall dimensions, realizing direct replacement and no modification required, greatly reducing vehicle maintenance time and cost.
📦 Packaging & Shipping
We adopt professional standard export packaging for all leaf spring products, tightly bundled with high-strength steel strips, fully wrapped with thick anti-rust plastic and waterproof film, then stably loaded on fumigated solid wooden pallets to avoid deformation, rust and damage during long-distance sea transportation. We support flexible delivery solutions to meet diverse customer needs. Located in Zhengzhou, Henan, we enjoy superior geographical logistics advantages. We mainly deliver goods from core domestic ports including Qingdao Port , Tianjin and LianYun Port, and support multiple trade terms such as FOB, EXW, CIF, CFR and DDP. With long-term cooperative logistics providers, we ensure stable shipping schedules, safe cargo transportation and cost-effective logistics services for global clients.
Why Choose Our Leaf Springs
- Manufactured using high-strength alloy steel (SUP9 / 60Si2Mn)
- Heat-treated for improved hardness and fatigue resistance
- Shot peening surface treatment for longer service life
- Strict load and fatigue testing before shipment
- OEM interchangeable fitment with Dongfeng systems
- Stable performance under heavy-duty working conditions
FAQ
Q1: Is this part OEM or aftermarket?
A: It is an OEM-compatible replacement designed for Dongfeng truck suspension systems.
Q2: What material is used in this leaf spring?
A: High-strength alloy steel such as SUP9 or 60Si2Mn.
Q3: Can you produce customized leaf springs?
A: Yes, OEM and customized production is available.
Q4: What is your delivery time?
A: Typically 20–30 days depending on order quantity.
Q5: What vehicles is it compatible with?
A: It is suitable for various Dongfeng heavy-duty truck platforms.
Common Problems of Worn Leaf Springs
Vehicle tilting or sagging on one side
Reduced load-carrying capacity
Excessive vibration during driving
Visible cracks or deformation on spring leaves
When to Replace Leaf Springs
Leaf springs should be replaced when fatigue cracks, deformation, or reduced elasticity are observed. Delayed replacement may affect vehicle safety and suspension performance.
🤝 Our Service Guarantee
We provide personalized customized processing according to customer drawings and samples, supporting non-standard product customization. All products enjoy a 12-month manufacturer quality warranty. Our professional international sales team provides fast online response and one-stop purchasing consulting service, with rich export experience to serve global truck parts distributors and maintenance merchants.
📝 Note to Buyer
To avoid wrong purchase, please confirm the reference number or provide your vehicle VIN code.
Contact Zhengzhou Haishuo for a quote and experience reliable suspension solutions!
