Heavy Duty Multi Leaf Springs for Trailers and Semi-Trailers

Heavy Duty Multi Leaf Springs for Trailers and Semi-Trailers

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Heavy Duty Multi Leaf Springs for Trailers and Semi-Trailers​

Purpose-built for the rigorous demands of trailers and semi-trailers , our Heavy Duty Multi Leaf Springs are the backbone of any robust suspension system designed to handle high payloads and extended operational hours. These springs provide the essential balance between strength and flexibility, ensuring safe and stable transportation of heavy cargo over diverse road conditions, from highway long hauls to challenging vocational routes.

Technical Design & Engineering Advantages​

Superior Load-Bearing Capacity through Multi-Layer Design

The multi-leaf configuration is strategically engineered to distribute heavy loads evenly across each individual leaf. This layered approach significantly increases the overall carrying capacity compared to single-leaf designs, preventing premature sagging and ensuring the trailer maintains proper ride height and axle alignment even when fully loaded to maximum GVWR.

Optimized Damping and Fatigue Resistance

Each leaf in the stack is manufactured from high-grade alloy steel and features precisely calculated contact points and optimized curvature. This geometry enhances the spring’s natural frequency, effectively dampening vibrations and chatter from uneven pavement. The robust construction offers exceptional resistance to metal fatigue, allowing the springs to endure millions of stress cycles without failure.

Reduced Friction and Noise with Precision Liners

To improve longevity and reduce operating noise, the leaves are equipped with high-quality composite or polymer liners between the layers. These liners minimize inter-leaf friction during suspension articulation, which not only prevents wear on the steel surfaces but also helps maintain consistent performance by reducing the energy lost to internal heat generation.

Corrosion-Resistant Finish for Extended Service Life

Recognizing the harsh environments trailers often encounter (including road salt and moisture), the springs undergo a specialized shot-peening and powder-coating process. This provides a durable, protective barrier that guards against rust and corrosion, preserving the structural integrity and aesthetic appearance of the springs throughout their service life.

🏭About Zhengzhou Haishuo Automotive Parts Co., Ltd.

We are a professional manufacturer and exporter of heavy-duty truck suspension components, established in 2016 and located in Zhengzhou, Henan Province, China. Specializing in leaf springs, chassis parts, and suspension accessories, we have grown into one of the leading suppliers in China’s automotive leaf spring aftermarket.

Production Capacity: Over 4,000 tons of leaf springs in stock, enabling rapid order fulfillment

Global Reach: Exported to over 100 countries and regions, including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and Western Europe

OEM/ODM Services: Custom manufacturing available for private label, OEM, and aftermarket projects

Quality Assurance: Backed by SGS audit certification, with dedicated QA/QC inspectors ensuring every product meets international standards

Comprehensive Product Line: Our catalog includes heavy-duty, conventional, parabolic, and trailer leaf springs, plus complete accessories like U-bolts, bushings, clips, and shackles

Leaf Spring Technical Parameters

Item Specification
Material 50CrVA / 51CrV4 / 55CrMnA / 60Si2Mn
Width 60mm – 120mm
Thickness 6mm – 30mm
Load Capacity 500kg – 20,000kg
Surface Treatment Painting / E-coating

📦Packaging, Shipping & Terms

Packaging: Standard export wooden crates or cartons with protective wrapping to prevent damage during transit

Shipping Ports: Qingdao Port, Tianjin Port and LianYun Port

Lead Time: 30 days (peak season) / 30 days (off season)

Accepted Incoterms: FOB, EXW, DDP, CIF, CFR

Payment Terms: L/C, T/T, D/P, PayPal, Western Union, small-amount payment options available

After-Sales Support: Professional sales and technical team providing order follow-up, product consultation, and after-sales service

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.

Important Notes

This product is an aftermarket replacement part, not an original OEM part. It is designed to fit the specified applications as a direct replacement component.

We recommend professional installation by a qualified technician to ensure proper fit, alignment, and safety.

contact us with your vehicle details or custom requirements, and our team will assist you in finding the right leaf spring solution.

Material

50CrVA, 51CrV4, 55CrMnA,60Si2Mn
Certificate

TS16949,ISO,CE
Craftsmanship

Multiple Isothermal Quenching and Tempering Proces
Specification

Customizable according to drawings
Packing

Export Standard Packing by Pallet
Packaging size

170*60*60cm

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