NM500 is a high-strength wear-resistant steel plate widely used in mining, construction, and heavy machinery due to its exceptional durability and resistance to abrasion. Below are its key material properties based on the latest data (2025):
1. Core Mechanical Properties
Hardness: 470–540 HBW (Brinell hardness), with surface hardness typically ≥470 HBW .
Tensile Strength: ≥1250–1700 MPa (varies by thickness and standard) .
Yield Strength: ≥1000–1300 MPa .
Elongation: ≥7–18% (depends on thickness and processing) .
Impact Toughness: ≥24–54 J at -20°C (longitudinal) .
2. Chemical Composition (Key Elements)
Carbon (C): 0.12–0.45% (enhances hardness) .
Chromium (Cr): ≤1.20–1.50% (improves wear and corrosion resistance) .
Manganese (Mn): ≤1.70% (strengthens and hardens) .
Alloy Additives: Mo (≤0.65%), Ni (≤1.00%), B (0.005–0.006%) for toughness and hardenability .
3. Wear and Environmental Resistance
Abrasion Resistance: 2–3× longer lifespan than standard steel under high-friction conditions .
Heat Resistance: Stable up to 600°C; with V/Mo additives, usable at 800°C .
Corrosion Resistance: High due to Cr content, suitable for harsh environments .
4. Processing and Applications
Weldability: Moderate; requires preheating to avoid cracks .
Formability: Supports bending, cutting (flame/plasma), and drilling .
Primary Uses: Excavator buckets, crusher liners, conveyor systems, and shipbuilding .
5. Standards and Heat Treatment
Standards: Complies with GB/T 24186-2022 (China) or equivalent .
Heat Treatment: Quenching + tempering (200–260°C) to balance hardness/ductility .
For specific project requirements (e.g., thickness >70mm), consult manufacturers for tailored properties
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