Introduction to Car Brake Shoes with HD (High-Density) Metallic Formula
The Brake Shoes Formula for HD metallic variants combines precision-engineered Brake Shoes Mixture and robust Brake Shoes Friction Materials to deliver exceptional stopping power under extreme conditions. This brake shoes mix integrates high-density metallic components optimized for commercial vehicles and heavy-duty applications.
Technical Specifications
| Parameter | Value/Description |
|---|---|
| Friction Coefficient | 0.45–0.55 (μ) |
| Operating Temperature | -50°C to 750°C |
| Density | 3.0–3.5 g/cm³ |
| Compressive Strength | ≥120 MPa |
| Hardness (Rockwell) | 95–100 HRB |
| Certifications | ISO 9001, JIS D4411 |
Advantages of HD Metallic Brake Shoes
- Superior Heat Resistance
- The brake shoes friction materials contain 60-65% steel fibers and iron oxide, maintaining stable performance up to 750°C.
- Heat dissipation rate: 15% faster than standard metallic formulas.
- Extended Service Life
- High-density brake shoes mixture reduces wear by 30% under heavy loads (tested at 10,000 cycles with 5-ton axle load).
- Noise Reduction
- Copper-coated graphite (8-10%) in the brake shoes formula dampens vibration, achieving noise levels <75 dB at 80 km/h braking.
- Corrosion Protection
- Zinc-aluminum alloy coating prevents rust in humid/salty environments, passing 240-hour salt spray tests.
Storage & Packaging Specifications
- Packaging:
- Individually wrapped in anti-oxidation VCI paper.
- Reinforced wooden crates with desiccant packets (max humidity 55% RH).
- Storage:
- Temperature: 5°C–30°C, avoiding direct sunlight.
- Stacking limit: 8 layers maximum to prevent edge damage.
Core Formula Composition
The brake shoes mix comprises:
- Metallic Components: Steel fibers (40%), iron powder (25%)
- Friction Modifiers: Graphite (12%), cashew resin (8%)
- Binders: High-temp phenolic resin (10%)
- Reinforcements: Aramid pulp (5%)
This brake shoes formula meets SAE J840 standards for heavy-duty vehicles, offering optimal balance between durability and braking responsiveness.