NM400 wear resistant plate is a premium abrasion resistant steel plate engineered for demanding environments where extreme wear, friction, and impact are constant challenges.
NM400 wear resistant plate
As a professional steel supplier, we provide NM400 steel plate with stable hardness (360–420 HBW), excellent toughness, and highly competitive pricing-making it the ideal choice for mining, construction, and heavy equipment industries.
If you are looking for a cost-effective alternative to Hardox 400 or AR400 steel, NM400 delivers an outstanding life-for-cost ratio, reducing downtime and maintenance expenses.
What is NM400 Wear Resistant Steel Plate?
NM400 steel plate belongs to the Chinese NM series abrasion resistant steel, produced under GB/T 24186 standard.
NM = "NaiMo" (wear resistant)
400 = nominal Brinell hardness (HBW)
This quenched and tempered (Q&T) steel plate is specifically designed for medium to high wear applications, combining:
- High surface hardness
- Strong core toughness
- Good weldability
- Excellent impact resistance
Why Choose NM400 Wear Resistant Plate?
1. Excellent Wear Resistance
With hardness of 360–420 HBW, NM400 significantly extends equipment service life.
2. Superior Cost Performance
Compared with imported brands like Hardox 400, NM400 offers similar performance at a lower price.
3. Good Weldability & Fabrication
Unlike ultra-hard plates, NM400 steel maintains good machinability and welding performance.
4. Wide Application Range
Perfect for industries requiring abrasion resistant steel plate:
- Mining equipment
- Dump truck bodies
- Excavator buckets
- Crusher liners
- Conveyor systems
NM400 Steel Plate Chemical Composition
The performance of NM400 wear resistant plate depends on its optimized alloy design:
| Element | Content (%) | Function |
|---|---|---|
| C | 0.25 – 0.40 | Increases hardness |
| Si | 0.20 – 0.80 | Improves strength |
| Mn | 0.60 – 1.60 | Enhances hardenability |
| P | ≤ 0.025 | Improves toughness |
| S | ≤ 0.010 | Improves weldability |
| Cr | 0.20 – 1.00 | Improves wear resistance |
| Ni | ≤ 0.50 | Enhances toughness |
| Mo | ≤ 0.30 | Improves hardenability |
| B | Trace | Micro-alloy strengthening |
Mechanical Properties of NM400 Steel Plate
| Property | Value |
|---|---|
| Hardness | 360 – 420 HBW |
| Tensile Strength | 900 – 1200 MPa |
| Yield Strength | 700 – 1000 MPa |
| Elongation | 8% – 18% |
| Density | 7.85 g/cm³ |
High surface hardness + tough core = longer service life under impact + abrasion.
NM400 Steel Plate Specifications
- Standard: GB/T 24186-2022
- Delivery Condition: Quenched & Tempered (Q&T)
- Thickness: 4 – 150 mm
- Certificate: EN 10204 3.1 MTC
- Surface: Shot blasted / painted / natural
NM400 vs Hardox 400 / AR400
| Grade | Region | Feature |
|---|---|---|
| NM400 | China | Best price-performance |
| Hardox 400 | Sweden | Premium brand |
| AR400 | USA | Common industrial grade |
| EH400 | Japan | High-quality alternative |
While hardness is similar, always verify welding and impact requirements for critical applications.
NM400 Plate Weight Chart
Calculation Formula:
Weight (kg) = Area (m²) × Thickness (mm) × 7.85
| Thickness (mm) | Weight (kg/m²) |
|---|---|
| 4 | 31.4 |
| 8 | 62.8 |
| 12 | 94.2 |
| 20 | 157.0 |
| 30 | 235.5 |
Fabrication Guide for NM400 Steel Plate
Welding
- Use low hydrogen electrodes
- Preheat recommended for thickness >20mm
- Avoid cold cracking
Cutting
- Plasma cutting (preferred)
- Oxy-fuel cutting
- Expect higher tool wear
Bending
- Cold bending possible
- Use larger bending radius
Applications of NM400 Wear Resistant Steel
NM400 steel plate is widely used in:
- Mining machinery wear parts
- Dump truck liners
- Excavator bucket liners
- Cement and quarry equipment
- Steel plant handling systems
NM400 Steel Plate Price (2025 Reference)
| Region | Price (USD/Ton) |
|---|---|
| China | $500 – $950 |
| North America | $950 – $1800 |
| Europe | $1100 – $2000 |
Buying directly from China suppliers can reduce costs by 30%–50%.
Why Choose Our NM400 Steel Plate?
We are a professional supplier of NM400 wear resistant steel plate, offering:
- Stable hardness (360–420 HBW guaranteed)
- Factory direct price
- Full MTC traceability (EN 10204 3.1)
- Fast delivery & global export
- Custom cutting & processing service
NM400 Steel Buying Checklist
Before purchasing NM400 steel plate, confirm:
- GB/T standard version (2009 or 2022)
- Hardness test report
- UT inspection for thick plates
- Thickness tolerance requirements
If you are looking for a reliable NM400 wear resistant plate supplier, we are ready to support your project with high-quality materials and competitive pricing. Our team understands the real demands of industries like mining, construction, and heavy equipment, and we are committed to helping you reduce wear-related costs while improving equipment lifespan.
We offer flexible solutions including custom sizes, cutting services, and fast global delivery, ensuring that you get exactly the NM400 steel plate you need without delays. Every order comes with full certification and strict quality control, so you can purchase with confidence.
Contact us today to get a fast FOB or CIF quotation, along with professional technical advice tailored to your application. Let us help you choose the right abrasion resistant steel plate and maximize your return on investment.
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.