NM550
NM550 wear resistant steel plate for mining and heavy machinery with superior hardness, excellent abrasion resistance, and long lifespan for extreme wear conditions.
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Ultra-High Hardness: Nominal hardness up to 550 HBW, providing superior resistance to abrasion and surface wear.
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Long Service Life: Extends equipment lifespan in extremely abrasive working environments.
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High Strength and Impact Resistance: Maintains mechanical strength even under strong impact loads.
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Good Processability: Can be welded, cut, and bent with proper preheating and procedures.
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Stable Quality: Produced under GB/T 24186 standard with strict hardness and toughness control.
NM550 Steel Plate Description
NM550 wear-resistant steel plate is a quenched and tempered high-strength steel with a nominal hardness of 550 HBW, designed for ultra-severe wear applications.
It’s developed under the Chinese standard GB/T 24186 and offers exceptional abrasion and impact resistance in comparison to NM500 or HARDOX 550.
This steel is ideal for manufacturing mining machinery components, bulldozer blades, dump truck bodies, hoppers, and crushers, where continuous friction and impact occur.
Its outstanding hardness, combined with good toughness and weldability, ensures excellent performance in mining, construction, and cement industries.
If you are a B2B buyer seeking cost-effective wear plates with high performance, our NM550 steel plates are available in customized dimensions and surface conditions.
NM550 Technical Data Sheet
| NM550 Chemical Composition | |||||||||
| Element | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) | B (%) |
| Typical Range | ≤0.32 | ≤0.70 | ≤1.60 | ≤0.025 | ≤0.010 | ≤2.00 | ≤1.00 | ≤0.70 | ≤0.005 |
| NM550 Mechanical Properties | ||
| Property | Unit | Typical Value |
| Standard | – | GB/T 24186 |
| Grade | – | NM550 |
| Hardness (HBW) | – | 530–590 |
| Yield Strength (ReL) | MPa | ≥1700 |
| Tensile Strength (Rm) | MPa | 1800–2100 |
| Elongation (A5) | % | ≥8 |
| Impact Energy (Charpy V, -20°C) | J | ≥20 |
| Thickness Range | mm | 6–100 |
| Delivery Condition | – | Quenched and Tempered |
| Equivalent Grades | – | HARDOX 550, DILLIDUR 550, JFE-EH550 |
NM550 Applications
NM550 wear-resistant steel plate is specially developed for extreme abrasion environments where materials face heavy friction and impact.
It is widely used in:
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Mining machinery: Buckets, loaders, and truck bodies exposed to constant wear
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Construction equipment: Bulldozer blades, hoppers, conveyors, and chutes
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Cement and aggregate industry: Mixers, silos, crushers, and liners
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Industrial systems: Material handling parts, feeders, and screening equipment
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Steel and metallurgical industries: Furnace linings, wear bars, and protection plates
By using NM550 plates, users can significantly reduce downtime, extend service intervals, and improve productivity in demanding environments.
