NM400, NM450, and NM500 are all grades of wear-resistant steel plates produced by Chinese steel mills. Wear-resistant steel is widely used in engineering, mining, construction and agriculture machinery products under extremely harsh working conditions with the requirement of high strength and high wear resistance, such as bulldozers, loaders, excavators, dump trucks and various mining machinery, etc.
Here are some key points about these grades:
NM400:
Hardness: Typically around 360-440 HBW.
Applications: Suitable for applications involving moderate wear conditions, such as mining machinery, construction machinery, and cement industry equipment.
NM450:
Hardness: Typically around 420-480 HBW.
Applications: Offers higher hardness compared to NM400, suitable for applications requiring increased abrasion resistance like dump truck bodies, cutting edges, and buckets.
NM500:
Hardness: Typically around 470-530 HBW.
Applications: Provides even greater hardness and wear resistance compared to NM400 and NM450, suitable for applications subjected to severe wear conditions like earthmoving machinery, crushers, and hoppers.
NM500 NM400 High Strength Wear resistant steel plate
Chemical Composition:
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni | B |
| NM400 | ≤ 0.25 | ≤ 0.70 | ≤ 1.60 | ≤ 0.025 | ≤ 0.01 | ≤ 1.40 | ≤ 0.50 | ≤ 1.00 | ≤ 0.004 |
| NM450 | ≤ 0.26 | ≤ 0.70 | ≤ 1.60 | ≤ 0.025 | ≤ 0.01 | ≤ 1.50 | ≤ 0.50 | ≤ 0.08 | ≤ 0.004 |
| NM500 | ≤ 0.38 | ≤ 0.70 | ≤ 1.70 | ≤ 0.02 | ≤ 0.01 | ≤ 1.20 | ≤ 0.65 | ≤ 1.00 | 0.005-0.006 |
Physical Performance:
| GRADE | Physical Performance | ||||||
| Thickness (mm) |
Y.P (MPa) |
T.S (MPa) |
E.L A5 (%) |
HB | Strength | ||
| °C | J/cm2 | ||||||
| NM400 | 3-40 | ≥1000 | ≥1250 | ≥10 | 360~430 | -20 | ≥30 |
| NM450 | 12-40 | ≥1250 | ≥1500 | ≥10 | 430~480 | -20 | ≥30 |
| NM500 | 40-80 | ≥1300 | ≥1700 | ≥10 | 480~520 | -20 | ≥30 |
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