NM450 - High-Strength Wear Plate

Hardness & Properties

Hardness: ~450 HBW (Brinell Hardness)

Material Type: Quenched and Tempered Low-Alloy Steel

Typical Thickness Range: 6mm - 100mm

Yield Strength: ≥1200 MPa

Characteristics

• Nomenclature commonly used in Chinese/Japanese markets
• Comparable to AR450 in performance and applications
• High yield strength and toughness - Excellent structural properties
• Good weldability with proper procedures
• Excellent formability for a wear-resistant grade

Applications

• Earthmoving machinery components
• Mining and quarry equipment
• Conveyor systems and wear liners
• Structural wear parts
• Dump truck bodies
• Excavator buckets
• Crusher wear parts
• Construction equipment

Advantages

• High abrasion resistance suitable for heavy-duty applications
• Excellent toughness - Good impact resistance
• Good formability - Easier to fabricate than higher hardness grades
• Cost-effective - Competitive pricing in Asian markets
• Wide availability - Readily available from Asian suppliers

Processing Characteristics

Cutting: Can be cut using plasma, laser, or oxy-fuel cutting methods.

Forming: Good formability. Can be bent and formed with appropriate equipment.

Welding: Weldable with preheat (250-300°F) and low-hydrogen electrodes. Similar welding procedures to AR450.

Machining: Difficult to machine. Carbide tooling recommended.

Chemical Composition (Typical)

Carbon (C): ≤0.26%

Silicon (Si): ≤0.70%

Manganese (Mn): ≤1.70%

Phosphorus (P): ≤0.025%

Sulfur (S): ≤0.010%

Chromium (Cr): ≤1.00%

Molybdenum (Mo): ≤0.50%

Boron (B): ≤0.004%

Comparison with Other Grades

vs. AR450: NM450 is essentially equivalent to AR450, with similar hardness and performance characteristics.

vs. AR400: NM450 offers higher wear resistance and strength.

Best for: Heavy-duty mining and construction applications where AR450 performance is required, particularly in Asian markets.