T: +86-0731-85185770
E: enquiry@qilumetal.com
E: enquiry@qilumetal.com
No. 18 Xiangfu Middle Road,Yuhua District, Changsha City
 |
| Quantity: | |
|---|---|
NM400
Qilu
NM400 wear resistant steel plate is a high-strength abrasion-resistant steel developed for equipment and structures exposed to severe wear, impact, friction, and heavy-duty operating conditions. With a nominal Brinell hardness of approximately 400 HBW, NM400 offers a practical combination of wear resistance, strength, toughness, and fabrication performance.
NM400 steel plate is widely used in mining machinery, construction equipment, quarrying, material handling systems, crushers, conveyors, dump trucks, loaders, excavators, and industrial wear parts.
Qilu Steel supplies NM400 wear-resistant steel plates in a range of thicknesses, sizes, and surface conditions to meet different fabrication and engineering requirements.
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo | Ti | B | Als |
| NM400 | 0.30 Max | 0.70 Max | 1.60 Max | 0.025 Max | 0.010 Max | 1.20 Max | 0.70 Max | 0.50 Max | 0.050 Max | 0.0005-0.0060 | 0.010 Min |
| Grade | Plate Thickness | Tensile Strength | Elongation | Impact | Brinell Hardness |
| NM400 | ≤80 mm | ≥1200 MPa | ≥10 % | Not required | 370‑430 HBW |
| NM400D | ≤80 mm | ≥1200 MPa | ≥10 % | ≥24 J ‑20℃ | 370‑430 HBW |
| NM400E | ≤80 mm | ≥1200 MPa | ≥10 % | ≥24 J ‑40℃ | 370‑430 HBW |
Thickness：4 mm‑120 mm
Width：1500 mm‑3200 mm
Length：6000 mm‑12000 mm
Delivery condition：Quenched + Tempered (Q+T)
Surface：As‑rolled, shot‑blasted or primed surface optional
Service：Custom sizes, cutting, bending, edge preparation per drawing
NM400 wear-resistant steel plate can be used in many industrial applications where abrasion resistance is an important design requirement.
Dump truck bodies, buckets, hoppers, crushers, chutes, and conveyors.
Bulldozer blades, excavator arms, bucket teeth, and loaders.
Liners, screens, wear strips, and pipe elbows.
Shredder hammers, sorting tables, and impact walls.
Plowshares, harrow discs, and grain augers.
| Grade | Approx. Hardness | Typical Characteristics | Common Use |
| NM360 | 360 HBW | Good wear resistance and fabrication balance | General wear parts |
| NM400 | 400 HBW | Higher wear resistance with good toughness | Heavy-duty wear applications |
| NM450 | 450 HBW | Higher hardness and improved abrasion resistance | Severe wear conditions |
The higher hardness of NM450 does not automatically make it the best choice for every application. As hardness increases, forming, cutting, welding, and machining requirements may also become more demanding.
NM400 is often selected when the application requires a balance between wear resistance, toughness, strength, and fabrication performance.
NM400 and AR400 are both commonly associated with approximately 400 HB-class wear-resistant steel, but they are not necessarily identical grades.
“AR400” is generally a commercial designation used for abrasion-resistant steel with a nominal hardness of around 400 HBW, while “NM400” refers to a specific grade designation used in the Chinese steel market.
A1: NM400 features balanced hardness‑toughness with moderate cost. NM450 / NM500 delivers higher hardness for extreme heavy‑abrasion scenarios yet lower toughness.
A2: NM400 is a Chinese abrasion-resistant structural steel grade under GB/T 24186. The "N" denotes resistance to impact and abrasion, "M" indicates high-strength structural application, and "400" refers to the minimum Brinell hardness of 400 HBW. It is broadly comparable to AR400 and Hardox 400 in global standards.
A3: Yes, NM400 is widely accepted as the Chinese equivalent to AR400 and Hardox 400 in terms of hardness and wear resistance. However, minor differences exist in alloying strategies and impact toughness values. For most heavy-wear applications—such as dump truck liners, crusher parts, and excavator buckets—NM400 offers comparable performance at a more competitive cost point.
A4: NM400 offers 3 to 4 times longer wear life than Q345 or similar mild steels in abrasive environments. While Q345 prioritizes formability and general structural use, NM400 is specifically alloyed for surface hardness and impact resistance. The trade-off is reduced ductility, so NM400 is not recommended for primary load-bearing structural frames without proper design consideration.
We offer NM400 plates in a full range of thicknesses with full Mill Test Certificates. Contact us today for application-specific recommendations or to request a competitive quote.
