As a professional truck bolt manufacturer, we understand that 80% of a bolt’s performance hinges on its core material. Material serves as the foundation determining a bolt’s strength, toughness, and durability. Here, we break down the key materials used in manufacturing premium truck bolts and their characteristics.
1. Core Material: Alloy Structural Steel
Truck bolts must operate under extreme loads, continuous vibration, and temperature fluctuations, demanding exceptionally high material standards. We primarily utilize medium-carbon alloy steels such as 40Cr (chromium steel), 35CrMo (chromium-molybdenum steel), and 42CrMo. These materials incorporate alloying elements like chromium, molybdenum, and manganese, significantly enhancing the steel’s hardenability, strength, and fatigue resistance.
· 40Cr: Offers excellent comprehensive mechanical properties and is a common material for manufacturing high-strength bolts.
· 35CrMo / 42CrMo: The addition of molybdenum significantly enhances high-temperature strength and creep resistance, making these alloys ideal for connections in high-temperature, high-stress areas like engines and turbochargers.
2. Performance Assurance: Advanced Heat Treatment Processes
Superior raw materials must be paired with precise heat treatment to fully unlock their potential. Our bolts undergo quenching and tempering (quenching + high-temperature tempering) to achieve a sorbitic microstructure. This process delivers an optimal balance of high strength and excellent toughness, preventing brittle fracture under impact loads.
3. Surface Protection: Anti-rust and Corrosion-resistant Coatings
To withstand complex operating environments, we offer diverse surface treatments:
· Blackening/Phosphating: Forms a protective film for rust prevention and aesthetic appeal.
· Hot-dip Galvanizing/Electrogalvanizing: Provides superior electrochemical corrosion protection, ideal for humid, rainy, or snowy conditions.
· Dacromet (Zinc-Chromate Coating): Offers superior corrosion resistance, is environmentally friendly, and eliminates hydrogen embrittlement risks—the preferred choice for premium commercial vehicles.
4. Strict Source Control: Full Traceability from Materials to Finished Products
We source materials from reputable steel mills, with each batch accompanied by material certificates and subjected to incoming inspection. Through spectroscopic analysis, hardness testing, and metallographic examination, we ensure 100% compliance of material composition and structure with standards. Combined with fully automated production lines and intelligent monitoring, we guarantee the consistency, stability, and traceability of material properties for every bolt.
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Materials define the ceiling; craftsmanship sets the floor.
We firmly believe that only through profound understanding and reverence for materials science can we forge reliable bolts that safeguard every transport journey. We are committed to transforming the finest materials into your most trusted connection assurance.
Post time: Dec-19-2025