Introduction to Truck Brake Linings HD (High-Density) Metallic Mixture
Truck brake linings HD metallic mixtures are advanced brake linings friction materials designed for heavy-duty vehicles requiring exceptional durability and heat resistance. This brake linings formula combines high-density metallic components (e.g., steel fibers, copper particles) with binding resins and friction modifiers, ensuring reliable performance under extreme loads and temperatures. Below is a detailed overview of its technical specifications, advantages, and storage guidelines.
Technical Parameters
The table below summarizes the critical properties of HD metallic-based brake linings mixes:
| Parameter | Specification | Remarks |
|---|---|---|
| Metallic Content | 65-80% (Steel fibers, Copper, Iron) | Enhances thermal conductivity and structural integrity |
| Density | 3.2-3.8 g/cm³ | High-density design reduces wear and noise |
| Friction Coefficient (μ) | 0.38-0.50 (Dry) | Stable across speed and temperature ranges |
| Operating Temperature | -40°C to 800°C | Resists thermal fade and cracking |
| Compressive Strength | ≥350 MPa | Withstands high hydraulic pressure |
| Wear Rate | ≤0.3 cm³/MJ | Extended service life for heavy trucks |
| Shore Hardness | 70-85 Shore D | Optimized for drum/pad compatibility |
Key Advantages
- Superior Heat Dissipation
The high metallic content efficiently transfers heat, minimizing brake fade during prolonged downhill braking . - Enhanced Durability
Reinforced with steel fibers, this brake linings mixture exhibits 30% lower wear rates compared to standard metallic formulations . - Consistent Braking Performance
The brake linings formula maintains a stable friction coefficient even under wet or high-temperature conditions, ensuring predictable stopping power. - Noise Reduction
Graphite and ceramic additives minimize vibration and squeal, improving driver comfort . - Environmentally Friendly
Free from asbestos, aligning with global safety regulations .
Storage and Packaging
- Moisture Control: Packaged in sealed, moisture-proof bags to prevent oxidation of metallic components .
- Temperature: Store in dry environments below 35°C; avoid freezing temperatures.
- Stacking: Maximum stacking height of 6 layers to prevent deformation.
- Shelf Life: 18 months in original, unopened packaging.
Application Guidelines
The brake linings mixes are molded under high pressure (20-40 MPa) and sintered to ensure adhesion to the brake shoe plate. Post-production testing includes thermal cycling (800°C to 25°C) and shear strength validation (≥4.0 MPa) . Custom formulations are available to meet OEM specifications for load capacity or regional climate conditions.
This high-performance material is ideal for mining trucks, long-haul trailers, and other vehicles operating in harsh environments, delivering reliability and cost-efficiency over extended service intervals.