NM550 / NM600 Steel Plate belongs to a premium category of high hardness wear-resistant steels, widely used in applications where extreme abrasion and high impact resistance are required. These plates are quenched and tempered (Q+T) to achieve excellent hardness, strength, and durability, especially in mining, construction machinery, and industrial equipment.
At GNEE Steel, we supply NM550 and NM600 plates that meet or exceed Chinese GB/T 24186 standards, and are compatible with Hardox 550 / 600 and JFE EH500 / EH600 equivalents.
Whether you're sourcing for crusher liners, bulldozer blades, excavator buckets, or heavy-duty dump truck bodies, these high-performance materials ensure long service life and reduced maintenance.
Why Choose NM550 / NM600 Wear Resistant Steel?
- Superior hardness: Up to 600 HBW for excellent wear resistance
- High strength: Yield strength above 1200 MPa
- Reliable toughness: Maintains impact resistance at low temperatures
- Custom cutting: Plasma, laser, and flame cutting available
- Global supply: Exported to Southeast Asia, South America, Africa, and Middle East
Specifications and Standards
| Parameter | NM550 Plate | NM600 Plate |
|---|---|---|
| Standard | GB/T 24186-2009 | GB/T 24186-2009 |
| Thickness Range | 6mm – 80mm | 6mm – 60mm |
| Width Range | 1000mm – 2500mm | 1000mm – 2500mm |
| Length Range | Up to 12000mm | Up to 12000mm |
| Tolerance Standard | GB/T 709-2006 | GB/T 709-2006 |
| Delivery Condition | Quenched + Tempered | Quenched + Tempered |
| Surface Options | Mill finish, Shot blasted, Pickled | Same |
| Cutting Service | Plasma, Laser, Waterjet | Same |
| Equivalent Grades | Hardox 550, JFE EH500 | Hardox 600, JFE EH600 |
NM550 Plate
NM550 Chemical requirement
|
Grade |
Chemical requirement or element Max % |
|||||||||||
|
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
Ti |
B |
ALs |
|
|
NM550 |
0.38 |
0.70 |
1.7 |
0.020 |
0.010 |
1.2 |
1.0 |
0.70 |
0.05 |
0.005- 0.006 |
0.010 min |
|
NM550 Property in tensile and yield strength, and impact test requirement
|
Grade |
Property |
Impact test |
HBW |
||
|
NM550 |
Yield Mpa Min |
Tensile Mpa |
Elongation |
Min J |
Min 530 |
|
Thickness mm |
Thickness mm |
Degree |
|||
|
《70mm |
<=70mm |
% |
-20 |
||
|
|
|
|
|
||
NM600 Plate
NM600 is a wear-resistant structural plate produced by quenching and tempering or TMCP routes. The "NM" prefix in Chinese grade nomenclature comes from the pinyin "NaiMo" meaning "wear-resistant"; the numeric suffix indicates the nominal Brinell hardness class (600 HBW nominal). NM600 is designed to deliver long life in abrasive/impacting environments while remaining usable in welded fabrications and heavy assemblies. It is a premium product in the NM series (NM300, NM360, NM400 → NM600), intended where NM500 or NM550 no longer provide adequate service life.
Chemical composition (typical / normative values)
| Element (wt.%) | Typical max / range (NM600, representative) |
|---|---|
| C | ≤ 0.45 |
| Si | ≤ 0.70 |
| Mn | ≤ 1.90 |
| P | ≤ 0.020 |
| S | ≤ 0.010 |
| Cr | ≤ 1.5 |
| Ni | ≤ 1.0 |
| Mo | ≤ 0.80 |
| Ti | ≤ 0.05 |
| B | ≤ 0.005–0.006 |
| Al (soluble) | ≥ 0.010 (deoxidation) |
Mechanical & physical properties (typical / guaranteed)
| Property | Typical (representative) |
|---|---|
| Hardness (surface, HBW) | 570 – 640 HBW (nominal 600 HBW) |
| Tensile strength (Rm) | ~1100 – 1600 MPa (depends on thickness & supplier) |
| Yield strength (0.2%) | ≥ ~900 – 1350 MPa (depending on thickness) |
| Elongation (A5) | ≥ 6–12% (thickness dependent) |
| Charpy impact (–20 °C) | ≥ 10–30 J typical (grade and supplier vary) |
| Density | 7.85 g/cm³ (standard steel) |
Applications of NM550 / NM600 Wear Resistant Steel
- Mining equipment liners (chutes, hoppers, crushers)
- Earthmoving & construction machinery (buckets, blades)
- Cement & steel mills (screens, wear bars)
- Shot blasting machines and industrial wear parts
If your project requires high-performance NM550/NM600 wear plate with strict quality control and competitive factory pricing, GNEE is ready to support your needs.
Contact us today for technical specifications, stock availability, and a customized quotation. Let GNEE provide durable wear solutions that reduce downtime and maximize operational efficiency.
What is equivalent to NM600 steel?
NM600 occupies the same functional class as other global high-hardness abrasion steels.
Common equivalents seen in supplier literature:
- Hardox® 600 - nominal 600 HBW; widely regarded as a premium, tightly controlled product family.
- EH600 / EVERHARD-600 - Japanese product in the 600 HBW class.
- AR600 / AR600 class steels - a North American-style designation used by mills and distributors for similar hardness class.
- Chinese NM600 - made to GB/T 24186 series; when properly produced it can match the key performance of the above brands for many wear cases.
Q: Is NM600 weldable?
A: Yes. NM600 is weldable but requires controlled procedures (preheat, low H electrodes, controlled interpass) and attention to carbon equivalent and HAZ toughness. Do not weld without an approved WPS for the exact plate thickness/heat.
Q: Can I bend NM600 on a press brake?
A: Not recommended for thick plates; thin plates may be cold-formed with tight radii risk. For thicker sections, design without forming or use thermal forming.
Q: What hardness should I expect on delivery?
A: Typical target 570–640 HBW, with nominal 600 HBW; insist on Brinell readings on MTC.
Q: Is NM600 better than NM500?
A: NM600 gives longer wear life in abrasive conditions but less ductility and more fabrication challenge than NM500. Choose based on abrasion vs impact balance.
Q: What standards apply to NM600?
A: GB/T 24186 (China) for NM series; Brinell hardness per ISO/EN 6506. For cross-checking equivalence see SSAB and JFE product data sheets.
Q: Are there counterfeit or mislabeled NM600 plates?
A: Yes, always verify MTC, hardness tests and supplier traceability; buy from reputable mills or qualified traders.
Q: What thickness range is commonly stocked?
A: Commercially stocked between 6–50 mm; specialized production up to 80 mm exists.
Q: Does NM600 corrode faster due to higher alloying?
A: NM600 is not corrosion resistant (it's carbon/martensitic steel). If corrosion is a concern, plan coatings, galvanizing (limited), or use stainless overlays.
Q: How should I specify testing frequencies?
A: Request per-heat hardness sampling and mechanical testing per accepted standard (one set per heat or per defined thickness batch) and reserve right for third-party inspection.
Q: Is NM600 used in body armor?
A: Some AR600/600 HBW steels are used in ballistic plates, but armor applications require dedicated ballistic certification and specific plate processing - do not assume merchant NM600 is ballistic-rated.
