NM400 wear-resistant steel plate is a high-strength, abrasion-resistant steel designed for applications where extreme wear and impact occur. As part of the NM ( "Nai Mo") series, NM400 combines high hardness, good toughness, and excellent weldability, making it ideal for industries such as mining, construction, and heavy machinery.
NM400 wear-resistant steel plate
Gnee supplies NM400 steel plates with consistent quality, precise hardness, and global delivery capabilities, helping manufacturers extend equipment life and reduce maintenance costs.
NM400 Steel Plate Standard and Classification
Standard: GB/T 24186 (China)
Grade: NM400
Category: Wear-resistant steel / abrasion-resistant plate
Delivery condition: Hot rolled, quenched & tempered
Nominal hardness: 360 – 440 HBW
NM400 is designed for environments where high impact resistance and surface wear protection are critical.
Chemical Composition of NM400 Steel Plate
The chemical composition ensures a good combination of hardness, toughness, and weldability:
| Element | Content (%) |
|---|---|
| C (Carbon) | 0.12 – 0.20 |
| Si (Silicon) | 0.80 – 1.20 |
| Mn (Manganese) | 1.20 – 1.70 |
| P (Phosphorus) | ≤ 0.025 |
| S (Sulfur) | ≤ 0.015 |
| Cr (Chromium) | ≤ 0.30 |
| Ni (Nickel) | ≤ 0.30 |
High manganese content improves hardness and impact resistance, while low sulfur and phosphorus minimize the risk of cracking during welding or forming.
Mechanical Properties of NM400 Wear-Resistant Plate
| Property | Value |
|---|---|
| Hardness | 360 – 440 HBW |
| Yield Strength | ≥ 400 MPa |
| Tensile Strength | 950 – 1100 MPa |
| Elongation | ≥ 12% |
Main Applications of NM400 Wear-Resistant Steel Plate
NM400 steel plates are widely used in industries where wear, abrasion, and impact are common:
Mining Equipment – buckets, chutes, and hoppers
Construction Machinery – bulldozer blades, excavator parts, and backhoe buckets
Cement and Quarry Industry – crushers, conveyor components, and liners
Heavy Transport – dump truck beds, trailers, and cargo carriers
Steel & Power Plants – blast furnace and material handling components
Using NM400 reduces downtime and replacement costs due to its superior wear resistance.
Advantages of NM400 Wear-Resistant Steel Plate
High Hardness: Resists abrasive wear and prolongs service life
Good Toughness: Withstands heavy impact without cracking
Weldable: Compatible with standard welding processes for assembly
Cost-effective: Extends equipment lifetime, reducing maintenance and replacement costs
NM400 Steel Plate Supply Range
| Thickness | Width | Length | Delivery |
|---|---|---|---|
| 4 – 25 mm | 1000 – 2500 mm | 2000 – 12000 mm | Hot Rolled |
Custom sizes and cut-to-length services are available to meet specific equipment requirements.
NM400 wear-resistant steel plate is the preferred material for mining, construction, and heavy-duty industrial equipment. Its balance of hardness, toughness, and weldability ensures reliable performance under the harshest conditions, helping manufacturers reduce downtime and lower maintenance costs.
If you need high-quality NM400 wear-resistant steel plates, contact us now to request your NM400 steel plate quote and optimize your equipment life!
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What is NM400 steel?
NM400 is a type of wear-resistant steel plate, with a Brinell hardness value of HB. The hardness value of NM400 is broad, ranging from 360 to 420.
What is the difference between Hardox 400 and NM400?
Choose NM400 if you need a cost-effective solution for high-wear applications in construction and mining where budget is a primary concern. Choose Hardox 400 for applications requiring higher impact resistance and durability, especially in colder environments or where structural consistency is key.
What is the difference between AR 400 and NM400?
NM400 offers cost-effectiveness and low-temperature toughness, making it ideal for budget-conscious projects in moderate wear environments. AR400, with its superior impact resistance and formability, excels in high-impact applications requiring complex fabrication.
Can NM400 be reheated or heat-treated during processing?
This is one of the most critical warnings for first-time users.
NM400 steel plate must not undergo secondary high-temperature heat treatment. The material achieves its wear resistance through a quenched and tempered (Q+T) process. If reheated to high temperatures-such as flame heating for easier bending-the internal microstructure will be altered, resulting in a permanent loss of hardness and wear resistance.
Additionally, the recommended service temperature for NM400 is generally below 250°C–300°C. Exceeding this range may reduce its mechanical properties unless specially alloyed grades (with elements like Mo or V) are used.