AR400 - General-Purpose Wear Plate

Hardness & Properties

Approximate Hardness: 360-440 HBW (Brinell Hardness)

Material Type: Quenched and Tempered Carbon Steel

Typical Thickness Range: 6mm - 100mm

Key Characteristics

• Good balance of hardness, toughness, and cost - Ideal for cost-effective wear solutions
• Suitable for moderate to heavy wear - Performs well in abrasive environments
• Excellent formability - Can be cut, welded, and formed more easily than higher AR grades
• Good impact resistance - Maintains toughness while providing wear protection
• Weldable - Can be welded using standard procedures with proper preheating

Applications

• Dump truck beds and liners
• Material handling equipment
• Buckets and dozer blades
• Crusher lining plates
• Chutes and hoppers
• Conveyor systems
• Mining equipment wear parts
• Construction machinery components

Advantages

• Cost-effective solution for general wear applications
• Easy to fabricate compared to higher hardness grades
• Good weldability with proper procedures
• Versatile performance across various industries
• Readily available in various thicknesses and sizes

Processing Characteristics

Cutting: Can be cut using plasma, oxy-fuel, or laser cutting. Harder than mild steel but easier than AR450+.

Forming: Good formability when compared to higher AR grades. Can be bent and formed with appropriate equipment.

Welding: Weldable with proper preheat (typically 200-250°F) and low-hydrogen electrodes. Post-weld stress relief recommended for critical applications.

Machining: More difficult to machine than mild steel. Carbide tooling recommended.

Comparison with Other Grades

vs. AR450: AR400 offers better formability and weldability but lower wear resistance.

vs. Mild Steel: AR400 provides significantly better abrasion resistance with 3-4x longer service life in wear applications.

Best for: Applications requiring good wear resistance without extreme hardness, where formability and cost are important factors.