Wear Plate Steel
The NM series wear plate steel provides a complete hardness range from NM360 to NM600, covering applications from light industrial wear to extreme mining conditions. Lower grades focus on toughness and versatility, while higher grades prioritize maximum abrasion resistance.
- Description
NM series wear plate steel is the most widely used Chinese wear resistant steel standard, designed for different levels of abrasion and impact conditions. The series mainly includes NM360, NM400, NM450, NM500, NM550, and NM600. Each grade is defined by its hardness level and application environment, allowing users to select the most suitable material based on wear intensity and service conditions.
NM Series Wear Plate Steel Comparison
| Grade | Hardness (HBW) | Wear Resistance Level | Toughness | Main Characteristics | Typical Applications |
|---|---|---|---|---|---|
| NM360 | 330–390 | Basic | High | Good balance of toughness and wear resistance | Light mining equipment, general machinery, structural wear parts |
| NM400 | 380–460 | Medium | Good | Most widely used standard grade | Dump truck bodies, excavator buckets, cement plant liners |
| NM450 | 430–500 | High | Medium | Improved wear resistance and service life | Heavy mining equipment, high-impact wear areas |
| NM500 | 470–550 | Very High | Medium-low | Strong abrasion resistance, reduced deformation | Crushers, ore handling systems, heavy-duty liners |
| NM550 | 520–600 | Extreme | Lower | Ultra high hardness for severe wear | Mining crushers, extreme abrasion conditions |
| NM600 | 570–650 | Maximum | Lower | Highest hardness in NM series | High-impact crushing systems, extreme wear environments |
Performance Trend in NM Series
- Hardness increases from NM360 to NM600
- Wear resistance improves gradually with higher grades
- Toughness decreases slightly as hardness increases
- Weldability becomes more demanding at higher grades
Key Selection Logic
- NM360–NM400 → Suitable for general industrial and light wear conditions
- NM450–NM500 → Standard choice for mining and construction machinery
- NM550–NM600 → Used for extreme abrasion and high-impact environments
Microstructure Characteristics
All NM series wear plates are produced through quenching and tempering processes, forming a martensitic structure. This ensures:
- High surface hardness
- Controlled toughness balance
- Stable wear resistance under impact and abrasion
- Long service life in harsh environments
