Classification & Materials of Mining Truck Wheel Rim

1. Classification

By load capacity: Light-duty (≤50t), medium-duty (50–120t), heavy-duty (>120t);

By structure: One-piece rims, two-piece / four-piece split rims. Split lock ring rims are widely used on heavy mining trucks for easy tyre fitting and removal;

By mounting type: Bolt-fixed rims, lock ring clamped rims. Lock ring versions are the mainstream for heavy-duty open-pit mining vehicles.

2. Main Materials & Equivalent Chinese Standard Grades

The wheel blanks mainly adopt low-alloy high-strength steel of the S355 series:

S355JR, equivalent to GB Q355B: Offers good room-temperature impact resistance. A general-purpose grade for medium & small open-pit mining truck rims with balanced cost and basic anti-impact performance.

S355J2, equivalent to GB Q355D: Delivers guaranteed impact toughness at -20°C. Suitable for medium and heavy mining trucks operating in cold northern mining areas to prevent brittle fracture under low temperatures.

S355K2, equivalent to GB Q355E: Maintains excellent impact resistance at -40°C. Specially designed for ultra-heavy haulers in frigid open-pit mines with outstanding anti-fatigue and anti-deformation properties, at a higher cost.

3. Material Selection Principle

S355JR (Q355B) for conventional mines; S355J2 (Q355D) for cold northern mine sites; S355K2 (Q355E) for ultra-heavy 100+ tons trucks in extreme cold. All three grades feature high tensile strength, wear resistance and impact resistance as standard base materials for mining wheel rims.