Choosing the Right Raw Material for Leaf Springs:

A Comprehensive Guide

In the industry of heavy truck design and manufacture, the choice of raw material for leaf springs can make or break a vehicle’s loading performance. As an engineer or purchasing specialist, you’re tasked with selecting the optimal material that balances strength, durability, and cost-effectiveness. Today, we’ll dive deep into the world of high-performance leaf spring materials, focusing on five kinds of common use materials: SUP7, SUP9, 50CrV, 51CrV4, and 52CrMoV4. They align with specific requirements related to spring thickness, load-bearing capacity, and durability, ensuring excellent performance in diverse applications.
By understanding the one-of-a-kind attributes of these alloy steels, you can make well-informed decisions when choosing the best material for your leaf spring.

An Overview: A brief introduction of alloy steel type

  1. SUP7: A silicon-manganese spring steel known for its excellent fatigue resistance.

  2. SUP9: Another silicon-manganese steel, offering higher strength than SUP7.

  3. 50CrV: A chromium-vanadium steel prized for its toughness and wear resistance.

  4. 51CrV4: A variant of 50CrV with slightly higher carbon content.

  5. 52CrMoV4: A premium grade steel with added molybdenum for enhanced strength and heat resistance.

    PropertySUP7SUP950CrV51CrV452CrMoV4
    ApplicationsLight trucks, medium-duty trucks, buses, construction machinery, and other medium-load vehicles.Heavy-duty trucks, large construction machinery, mining vehicles, trailers, and other heavy-load vehicles.Ultra-heavy-duty trucks, mining equipment, large trailers, specialty vehicles, and extreme-duty machinery.Ideal for leaf springs, coil springs, and torsion bars in automotive and heavy-duty industrial applications.Primarily used in leaf springs for heavy-duty trucks, industrial machinery, and agricultural vehicles.It is especially suited for extreme load-bearing applications.
    Thickness and ShapeTypically used in leaf springs with standard thicknesses (6 – 10 mm), especially for conventional spring designs.Suitable for thicker leaf springs, particularly in the thickness (10 – 15 mm), and complex spring shapes.Ideal for leaf springs with thicknesses greater than 15 mm, suitable for special shapes and high-load applications.Commonly available in a range of 15 mm to 35 mm, suitable for Z type leaf springs, depending on specific use cases.Common thickness varies between 35 mm and 70 mm, suitable for Z type leaf springs, depending on customer requirements.
    Hardness (HRC)44~4846~5045~4946~5247~56

Why our leaf springs are not easy to break?

 
Our raw materials are all purchased from state-owned special steel factories.
These suppliers are known for their consistent quality and reliable deliveries, and have even participated in the development of China’s steel leaf spring industry standards. Each batch of steel undergoes rigorous quality testing and is accompanied by a quality-traceable information card, ensuring that you receive leaf springs of exceptional intrinsic quality. Our company firmly rejects the use of track steel and raw materials supplied by private steel mills. 
 
 

In addition, we use raw materials that contain more chemical elements than the industry average, thus ensuring that our leaf springs are more durable. Quality Conformity Certification are available as below:

Conclusion：

When making inquiries, please pay attention on confirming the raw material materials you need with leaf spring suppliers , and recognize the raw materials produced by state-owned factories, so that the product quality you get is assuranced, to avoid a negative impact on your reputation in the market.

Factory Location

No.33 YIXIN AVENUE, SHUANGQIAO INDUSTRY ZONE, CHONGQING, CHINA

Email

[email protected]

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