At Gnee Steel, we supply high-performance NM400 wear resistant plate and a full range of abrasion resistant steel plates including NM450 and NM500, specifically engineered for the harsh conditions of mining and quarrying industries.
NM400 wear resistant plate
Our NM series wear resistant steel plates are designed to withstand extreme impact and sliding abrasion, helping extend equipment lifespan, reduce downtime, and lower total operating costs.
Why Mining Equipment Requires NM Series Wear Resistant Steel Plate
Mining equipment operates under continuous exposure to abrasive materials such as limestone, iron ore, and coal. Standard carbon steel fails quickly under these conditions, leading to frequent replacement and high maintenance costs.
Gnee Steel's NM400 steel plate and NM series solutions provide:
- Extreme Hardness: To resist surface penetration by sharp minerals.
- Impact Toughness: To prevent cracking under heavy loads or falling rocks.
- Cost Efficiency: While the initial investment is higher, the extended replacement cycle lowers the total cost of ownership.
NM Series Wear Plate Comparison (NM400 vs NM450 vs NM500)
Choosing the right abrasion resistant steel plate is essential for balancing durability and fabrication performance.
1. NM400 Wear Resistant Plate
The NM400 steel plate is the most widely used wear resistant steel plate in mining.
- Hardness: 370–430 HBW
- Excellent balance of hardness and weldability
- Easy to fabricate and process
Best for: Chutes, screen plates, and conveyor liners.
2. NM450 Wear Resistant Steel Plate
- NM450 wear plate offers higher hardness and improved wear resistance.
- ~10–15% longer wear life than NM400
- Stronger resistance to sliding abrasion
Best for: Excavator buckets, side cutters, and medium-duty truck liners.
3. NM500 Wear Resistant Plate
For extreme wear environments, NM500 steel plate delivers the highest hardness.
- Hardness ≥ 470 HBW
- Maximum abrasion resistance
- Longer service life in harsh conditions
Best for: Crusher liners, heavy-duty dump truck bodies, and coal handling hoppers.
Technical Data of NM Series Wear Resistant Steel Plate
Application Selection Matrix
| Equipment | Wear Parts | Recommended Grade |
|---|---|---|
| Excavators | Buckets, cutters | NM400, NM450 |
| Dump Trucks | Body liners | NM450, NM500 |
| Crushers | Liners, breaker plates | NM500 |
| Conveyors | Liners, skirts | NM400 steel plate |
| Hoppers & Chutes | Wall plates | NM400, NM500 |
| Loaders | Cutting edges | NM450, NM500 |
Chemical Composition (Typical %)
| Grade | C | Si | Mn | P | S | Cr | Ni |
|---|---|---|---|---|---|---|---|
| NM400 | ≤0.25 | ≤0.70 | ≤1.60 | ≤0.025 | ≤0.010 | ≤1.20 | ≤0.70 |
| NM450 | ≤0.26 | ≤0.70 | ≤1.60 | ≤0.025 | ≤0.010 | ≤1.50 | ≤0.80 |
| NM500 | ≤0.38 | ≤0.70 | ≤1.70 | ≤0.020 | ≤0.010 | ≤1.50 | ≤1.00 |
Mechanical Properties
| Grade | Hardness (HBW) | Yield Strength | Tensile Strength | Elongation |
|---|---|---|---|---|
| NM400 | 370 – 430 | ≥ 1000 MPa | ≥ 1250 MPa | ≥ 10% |
| NM450 | 420 – 480 | ≥ 1100 MPa | ≥ 1350 MPa | ≥ 9% |
| NM500 | ≥ 470 | ≥ 1200 MPa | ≥ 1500 MPa | ≥ 8% |
How to Choose the Right NM Wear Resistant Plate
When sourcing from Gnee Steel, consider the primary wear mechanism of your project:
- Sliding Abrasion: If materials are sliding over the surface (e.g., chutes), prioritize hardness. NM500 is preferred here.
- Impact Wear: If heavy rocks are falling onto the plate, you need a balance of hardness and toughness to prevent brittle cracking. NM400 wear resistant plate or NM450 are often the safest choices.
- Fabrication Requirements: If you require extensive cold bending or complex welding on-site, NM400 steel offers the easiest processing characteristics.
Why Choose Gnee Steel NM400 Wear Resistant Plate
As a leading global supplier, Gnee Steel ensures that every plate delivered to a mine site or quarry meets international quality standards. Our products feature:
- Consistent Surface Hardness: Uniform protection across the entire plate.
- Stable Toughness: Engineered to resist cracking even in sub-zero mining environments.
- Certified Quality: All shipments include Mill Test Certificates (MTC) and are subject to rigorous SGS/ISO inspections.
If you are sourcing reliable NM400 wear resistant plate or comparing NM400 vs NM450 vs NM500 steel, our team is ready to support your project with professional material selection and factory-direct supply. We help you choose the right abrasion resistant steel plate based on your working conditions, ensuring maximum performance and cost efficiency.
Contact Gnee Steel today to get a fast quotation, technical support, and customized solutions. Let us help you extend equipment life, reduce downtime, and improve productivity with high-quality NM400 steel plate and NM series wear solutions.
Contact now to get NM400 steel plate Quote
Is NM400 the same as Hardox 400?
No. they are comparable in nominal hardness band (~400 HBW) but Hardox® 400 is a branded product with controlled chemistry, guaranteed toughness and detailed mill documentation from SSAB. NM400 is a Chinese standard grade with similar hardness but variable mill-to-mill properties. Always specify required testing and acceptance criteria, not only grade name.
Can NM400 be welded to structural steels?
Yes with matched filler and appropriate preheat/thermal control. Avoid high heat input and verify consumables with the supplier's welding instructions.
How do I select between NM400 and a harder NM450 / NM500?
Choose by wear mode: for abrasive sliding wear NM400 often suffices; for extremely abrasive, long-life needs select NM450/NM500 but expect increased cost and reduced formability.
Is NM400 suitable for bucket liners and dump bodies?
Yes. widely used for these applications; ensure weldability and thickness suit the application.
Can NM400 be flame cut and drilled?
Yes; use standard industrial cutting methods but be mindful of hardened surface causing additional tool wear.
How should NM400 be stored and handled?
Store flat on timber, avoid edge damage, keep clean and protected to avoid contamination of welding surfaces.