NM500 Wear Resistant Plate in Stock

As a high-strength wear-resistant steel, NM500 belongs to the high-hardness grade of the NM series of wear-resistant steels in China.Compared to NM450 steel, NM500 offers further performance improvements. As a “long-life material” for high-wear conditions, NM500 achieves superior wear resistance with an ultra-high hardness of 500 HBW, while also maintaining sufficient toughness to avoid the risk of fracture.

The initial cost of NM500 is 50-80% higher than that of ordinary steel plates, but it can reduce overall maintenance costs by 40-60% over its lifespan. Therefore, it is widely used in core wear-resistant components in industries such as mining, construction machinery, and metallurgy.

NM500 STEEL CHEMICAL COMPOSITION

Grade	C	Si	Mn	P	S	Cr	Mo	Ni	Ti	B	Als
NM500	≤0.38	≤0.7	≤1.7	≤0.02	≤0.01	≤1.5	≤0.65	≤1.0	≤0.05	0.0005-0.006	≥0.01

NM500 STEEL RELATED STANDARD & EQUIVALENT GRADE

Germany	Sweden	Japan	USA	Belgium
DILLIDUR 500V	SSAB HARDOX 500	JFE-EH500	WearTuf 500	XAR500

NM500 Steel Physical Properties

Density: 7.85 g/cm³ (same as ordinary steel plate)
Elastic modulus: 205-208 GPa (20℃)
Specific heat capacity (cₚ)：460-480J/(kg·K)(20℃)
Thermal conductivity: 44-46 W/(m・K) (20℃)
Coefficient of linear expansion: 12.8-13.1×10⁻⁶/℃ (20-500℃)
Temperature resistance range: -40℃ to 300℃

NM500 Steel Mechanical Properties

Grade	Thickness(mm)	Surface Hardness(HBW)	Center Hardness(HBW)	Tensile Strength,Mpa	Elongation，%	Longitudinal impact,J
NM500	≤70	470-540	420-540	≥1350	≥7	≥21
NM500	>70-120	450-540	-	≥1350	≥7	≥18

QUICK FAQS FOR NM500 STEEL

Why does NM500 steel have high wear resistance?

Mechanism: NM500 forms a martensitic + bainitic composite structure through quenching and tempering, with high-hardness carbides (such as Cr₂₃C₆) distributed in the matrix, achieving a hardness of approximately HV1600, effectively resisting abrasive wear.

Performance: The wear rate of NM500 is only 1/4 that of ordinary steel plates, extending equipment life by 2-3 times and significantly reducing maintenance frequency.

Is NM500 easy to process?

Although NM500 has high hardness, it can still be processed.

Cut: Supports laser, plasma, and flame cutting (thick plates require preheating to 150-200℃).
Bending: Minimum bending radius ≥ 3 times the plate thickness; cold bending is possible.
Welding: Requires a special and strict process to achieve a reliable connection.

Why is NM500 the top choice for mining machinery?

Mining equipment faces a triple harsh environment of abrasive wear, impact loads, and humid corrosion. NM500’s 500HBW hardness effectively resists ore friction while maintaining sufficient toughness (≥24J) to prevent impact fracture. Its service life is up to 5 times that of ordinary steel, significantly reducing downtime losses.

What are the differences between NM500 and ordinary steel plates?

The core differences lie in hardness and wear resistance:

Brinnell hardness: 500 HBW vs. ordinary steel 120-140 HBW (approximately 4 times)
Wear resistance: 6-15 times higher than Q235, with a wear rate only 1/4-1/5 that of ordinary steel
Strength: Tensile strength ≥1350MPa, 3-5 times that of ordinary steel, allowing for thinner designs to achieve lightweighting.

What are the differences between NM500 and Hardox 500?

	NM500	Hardox 500	Comparison
Hardness	470-540HBW	80-525HBW	Basically equivalent
Tensile Strength	≥1350MPa	≥1500MPa	Hardox 500 is slightly higher
Toughness（- 20℃）	≥24J	≥27J	Hardox 500 is slightly better
Relative Price	x 0.7	x 1.0	NM500 offers a clear price-performance advantage.

Conclusion: For general industrial applications, the NM500 is a complete alternative; for extreme conditions and with a sufficient budget, the Hardox 500 can be considered.

What are the specific differences between NM500, NM450, and NM600?

Key differences comparison:

Parameters	NM450	NM500	NM600
Hardness (HBW)	420-480	470-540	570-640
Abrasion Resistance	Medium-High	Ultra-High	Very High
Impact Toughness (-20℃)	≥27J	≥24J	≥15J
Relative Price	x 1.0	x 1.1	x 1.25
Applicable Scenarios	Medium-High Wear + High Impact	Very High Wear + Medium Impact	Ultra-High Wear + Low Impact

Selection Recommendations:

For mining crushers, excavator buckets, and other applications with extremely high wear and moderate impact: NM500 is the first choice.
For vibrating screens, conveying equipment, and other applications with moderate impact and high wear: NM450 is a better option, offering better cost-effectiveness.
For ball mills, coal mills, and other applications with almost no impact and extremely high wear: Consider NM600 for further improved wear resistance and lifespan.