NM450 is a 450 HBW wear-resistant steel plate designed for abrasive service conditions. Its excellent combination of wear resistance, high strength, and good fabrication performance makes it an ideal material for dump truck bodies, helping extend service life while reducing maintenance and operating costs.
Dump truck bodies transport highly abrasive materials every day, including iron ore, granite, limestone, gravel, and coal. Continuous abrasion and impact gradually wear the body, leading to more frequent maintenance, shorter service life, and higher operating costs.
Why Is NM450 Used for Dump Truck Bodies?
The floor and side walls of a dump truck body are constantly subjected to abrasive wear caused by rocks and bulk materials sliding across the surface. At the same time, large stones generate repeated impact loads during loading, especially in mining operations.
Conventional structural steels such as Q355 or ASTM A36 provide adequate strength but relatively low hardness, causing rapid wear under abrasive conditions. Once the floor plate becomes thinner, cracks, deformation, and structural failures become more likely, leading to costly repairs or body replacement.
NM450 wear plate Chemical Composition(%)
| Steel Grade | C | Si | Mn | P | S | Cr | Ni | Mo | B |
| NM360 | 0.17 max | 0.50 max | 1.50 max | 0.025 max | 0.015 max | 0.70 max | 0.50 max | 0.40 max | 0.005 max |
| NM400 | 0.24 max | 0.50 max | 1.60 max | 0.025 max | 0.015 max | 0.40-0.80 | 0.20-0.50 | 0.20-0.50 | 0.005 max |
| NM450 | 0.26 max | 0.70 max | 1.60 max | 0.025 max | 0.015 max | 1.50 max | 1.00 max | 0.50 max | 0.004 max |
| NM500 | 0.38 max | 0.70 max | 1.70 max | 0.020 max | 0.010 max | 1.20 max | 1.00 max | 0.65 max | 0.005-0.006 |
Delivery condition：Q+T(Quenched and Tempered)
NM450 wear plate Mechanical Properties
| Steel Grade | Y.S (MPa) | T.S (MPa) | Elongation A5(%) | Impact Test | Hardness | |
| min | min | min | (°C) | AKV J(min) | HBW | |
| NM360 | 800 | 1000 | 10 | -20 | 30 | 320-400 |
| NM400 | 1000 | 1250 | 10 | -20 | 30 | 360-440 |
| NM450 | 1250 | 1500 | 10 | -20 | 30 | 410-490 |
| NM500 | 1300 | 1700 | 10 | -20 | 30 | 450-540 |
Key Advantages of NM450 for Dump Truck Bodies
01
Full Vehicle Lightweighting
It achieves a weight reduction of 50% compared with 345MPa grade steel and 33% compared with 700MPa grade steel, cutting energy consumption effectively.
02
Deliver superior abrasion resistance
Compared with conventional materials, it delivers 3.5 times superior abrasion resistance, longer service life and less maintenance downtime.
03
Improve the impact resistance of truck bodies
Under working conditions of lifting and unloading as well as material impact, the overall structural deformation of the truck body is reduced by more than 65%.
04
Advantages in Total Life Cycle Cost
The unit price of NM450 is higher than Q355, yet the total material consumption is reduced by 25%~35%, resulting in only a 10%~18% increase in total raw material investment.
Not Sure If NM450 Is Right for Your Dump Truck Body?
Selecting the right wear plate depends on the type of material transported, impact severity, payload, and truck body design. Our engineers can help you choose the most suitable steel grade and plate thickness based on your operating conditions.
Contact us now for the latest price quote for NM450.
NM450 Steel Plates Specification & Recommended Plate Thickness
NM450 Steel Plates Specification：
- Thickness : 1.2mm-300mm
- Width : 50mm-4020mm
- Length : 50mm-18000mm
- Production : Hot-Rolled (HR)
- Standard : JIS G4051,GB711,YB/T107,ASTM
Recommended Plate Thickness for Each Part of Dump Truck Body：
Each section endures different levels of abrasion and impact, hence different plate thicknesses are recommended accordingly.
| Component | Recommended Thickness |
|---|---|
| Floor Plate | 8~16 mm |
| Side Panel | 6~10 mm |
| Front Baffle | 6~10 mm |
| Tail Gate | 6~8 mm |
| Stiffener Ribs | Determined by design requirements |
For hauling large ore lumps or heavy-load working conditions, local wear-resistant reinforcement plates can be added as actual demand requires.
NM450 Wear Resistant Steel Plate Regular Stock
| Thickness (mm) | Standard Width (mm) | Standard Length (mm) | Delivery Condition | Stock Status |
|---|---|---|---|---|
| 6–8 | 1500, 2000 | 3000–12000 | Quenched & Tempered | Regular Stock |
| 10–12 | 1500, 2000, 2200 | 3000–12000 | Quenched & Tempered | Regular Stock |
| 14–20 | 1500, 2000, 2200 | 6000–12000 | Quenched & Tempered | Regular Stock |
| 22–40 | 2000, 2200, 2500 | 6000–12000 | Quenched & Tempered | Limited Stock |
| 50–80 | 2000, 2200 | 6000–10000 | Quenched & Tempered | Production Order |
| 80–120 | 2000, 2200 | 6000–9000 | Quenched & Tempered | Production Order |
Notes:
Standard thickness range: 6–120 mm
Standard width: 1500–2500 mm
Standard length: 3000–12000 mm
Why Choose GNEE STEEL?
GNEE STEEL specializes in the export of wear-resistant steel plates. We supply NM450 abrasion resistant steel plates and custom fabrication services, including flame cutting, drilling, beveling, bending and more.
Our products come with EN 10204 3.1 material test certificates, third-party inspection is available upon request, and we have extensive experience supplying international projects.
Contact us now for the latest price quote for NM450.
Whether you are a mining equipment manufacturer, dump truck body producer or end-user mine operator, we can recommend suitable wear steel solutions tailored to your working conditions. This helps you cut procurement costs and extend equipment service life.
FAQ:
1.Why does NM450 steel have high wear resistance?
Principle: Through quenching and tempering heat treatment, a martensitic + bainitic composite structure is formed, with dispersed carbides (Cr₂₃C₆, Mo₂C) distributed on the NM450 steel matrix.
Performance: NM450 is 2.5-3 times more wear-resistant than Q345 ordinary steel plate and 15-20% more wear-resistant than NM400. Its service life is increased by 3-5 times under ore friction and material impact scenarios.
2.Can NM450 steel be welded?
Although NM450 is a high-hardness steel, reliable welding can be achieved through proper processes. The key is "temperature control + low hydrogen".
3.Why does the hardness of NM450 steel decrease after welding?
If the heat-affected zone of the weld is overheated, the martensitic structure will transform into pearlite, reducing the hardness by 10-20%.
Solution: Perform low-temperature tempering at 200-250℃ after welding, or control the welding heat input (reduce current, increase speed).
4.What is the cutting process for NM450 steel?
NM450 steel supports laser, plasma, and flame cutting, with laser cutting yielding the best results: minimal heat-affected zone (≤3mm) and smooth cut surface.
5.Why does NM450 steel crack after cold working?
Due to the high hardness of NM450 steel, if the cold bending radius is too small or the stamping deformation is too large after cold working, the internal stress will be high, which can easily lead to cracking.
Solution: Increase the bending radius (≥3 times the plate thickness), and perform stress-relieving tempering at 150-200℃ immediately after cold working.
