AR450 - Higher Abrasion Resistance

Hardness & Properties

Approximate Hardness: 430-480 HBW (Brinell Hardness)

Material Type: Quenched and Tempered Carbon Steel

Typical Thickness Range: 6mm - 80mm

Advantages Over AR400

• Increased abrasion resistance - 10-15% improvement in wear life
• Longer service life in sliding and impact wear environments
• Better performance in high-abrasion mining applications
• Reduced downtime due to extended component life
• Cost-effective upgrade from AR400 for demanding applications

Key Characteristics

• Higher hardness - Provides superior wear resistance
• Good toughness - Maintains impact resistance despite higher hardness
• Moderate formability - Can be formed with proper equipment and techniques
• Weldable - Requires proper preheating and welding procedures
• Through-hardened - Consistent hardness throughout thickness

Applications

• Mining equipment wear liners
• Heavy wear bucket liners
• Excavator buckets and cutting edges
• Crusher components
• High-impact chutes and hoppers
• Quarry equipment
• Cement plant wear parts
• Aggregate processing equipment

Processing Characteristics

Cutting: Plasma or laser cutting recommended. More difficult to cut than AR400 due to higher hardness.

Forming: Moderate formability. Requires more force and proper equipment compared to AR400.

Welding: Preheat to 250-300°F required. Use low-hydrogen electrodes. Post-weld heat treatment recommended for critical applications.

Machining: Difficult to machine. Carbide or ceramic tooling required.

Comparison with Other Grades

vs. AR400: AR450 offers 10-15% better wear resistance but slightly lower formability.

vs. AR500: AR450 provides better formability and weldability while AR500 offers higher wear resistance.

Best for: Heavy-duty mining and quarrying applications where increased wear resistance justifies slightly higher cost and reduced formability.