NM550 Wear Resistant Sheet
NM550 belongs to domestic wear-resistant steel plate, NM550 steel plate implementation standard: GB/T24186 special technical conditions.
NM550 belongs to the modulation of high abrasion resistant steel plate, NM550 is not only a high-strength wear resistant plate and also has a certain toughness and anti-fatigue properties are mainly used in mining machinery, coal mining machinery and equipment, environmental protection equipment, sand and gravel machinery.
NM550 itself carries the advantage of performance in the use of the process has been recognised and appreciated by the manufacturing industry at the same time is also the main application of mining machinery and coal mining machinery and equipment one of the materials.
Manufactured through advanced quenching and tempering (Q&T) processes, NM550 steel sheets combine high hardness with reasonable toughness, ensuring both performance and reliability.
At GNEE Steel, we supply high-quality NM550 wear resistant sheets with stable mechanical properties, precise thickness control, and global export standards.
Key Features of NM550 Wear Resistant Sheet
1. Ultra-High Wear Resistance
With hardness ranging from 530–580 HBW, NM550 effectively resists sliding wear, impact abrasion, and heavy friction, outperforming lower-grade wear plates such as NM400 and NM500.
2. Longer Service Life
NM550 wear resistant sheet can extend service life by 30–50% compared to standard wear-resistant steels, reducing downtime and replacement frequency.
3. High Strength Performance
NM550 provides excellent tensile and yield strength, ensuring structural integrity in heavy-load applications.
4. Good Toughness Under Controlled Conditions
Although harder, NM550 maintains acceptable impact toughness, especially when used in low-temperature or dynamic environments with proper engineering design.
5. Fabrication Capability
Cutting: Plasma, laser, or waterjet
Welding: Requires preheating and low-hydrogen electrodes
Bending: Limited cold forming due to high hardness
NM550 Armor Ballistic Steel Plate chemical composition
|
Chemical Composition |
steel plate |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
|
Thickness |
% |
% |
% |
% |
% |
% |
% |
|
|
2-120mm |
0.30-0.37 |
0.2-0.405 |
0.40-1.60 |
0.010-0.020 |
0.005-0.010 |
0.30-0.80 |
0.002-0.60 |
NM550 Ballistic Steel Armor Plate mechanical property
|
Hardness |
520-580HB |
|||||||
|
Mechanical Properties |
10mm thickness steel plate typical value |
Yield Strength |
Tensile Strength |
Elongation |
||||
|
Re |
Rm |
A5 |
||||||
|
Mpa |
Mpa |
% |
||||||
|
>1300 |
>1550 |
6 |
||||||
|
Impact Toughness |
10mm thickness steel plate typical value |
Test |
Impact test |
|||||
|
Temperature |
Charpy-V Longitudinal |
|||||||
|
ºC |
J |
|||||||
|
-20 |
12 |
|||||||
NM550 armored steel plate product details
Delivery status: default modulation control tie delivery, can be negotiated to do normalised + tempered or quenched + tempered, etc., different delivery status can directly change the performance and use, all in the choice of delivery status with the current should be done in unity.
NM550 is a representative of high strength structural steel plate. This steel plate has very high strength and toughness, and it is very hard, so it can be used for a long time in a variety of harsh conditions, including some extreme environmental conditions NM550 steel is a very strong and durable material that can be applied in a variety of harsh environments.
NM550 is a high wear-resistant steel plate, often used in the machinery manufacturing industry, such as: mining machinery, coal mining machinery, heavy machinery, mining car manufacturing, screening machine, hopper, fan, fan box, crusher, crusher side excavator, environmental protection equipment, etc. The application of the relatively more widely.
Applications of NM550 Wear Resistant Sheet
NM550 is specifically designed for extremely abrasive working conditions:
Mining Industry
Dump truck liners
Crushing equipment
Wear plates for conveyors
Construction Machinery
Excavator buckets and teeth
Bulldozer blades
Loader liners
Cement and Aggregate Industry
Chutes and hoppers
Mill liners
Silo discharge systems
Steel and Power Plants
Ash handling systems
Coal handling equipment
Blast furnace components
NM550 vs NM500 Wear Resistant Steel
| Feature | NM500 | NM550 |
|---|---|---|
| Hardness | 480–530 HBW | 530–580 HBW |
| Wear Resistance | Excellent | Superior |
| Toughness | Better | Slightly reduced |
| Service Life | Long | Longer in high-abrasion environments |
| Application | General wear | Extreme wear conditions |
Get A Quote For NM550 Wear Resistant Sheet
Looking for a reliable supplier of NM550 wear resistant sheet? GNEE Steel is your trusted partner.
- Contact us today to receive:
- Competitive pricing
- Technical support
- Customized solutions
We are ready to support your project with high-quality, durable, and cost-effective wear-resistant steel products.
What is NM550 wear resistant sheet?
NM550 wear resistant sheet is a high-hardness abrasion-resistant steel plate with a nominal hardness of 550 HBW, designed for extreme wear environments such as mining, cement, and heavy machinery. It is produced through advanced quenching and tempering processes to achieve superior durability and long service life.
What is the hardness range of NM550 wear resistant sheet?
The typical hardness of NM550 wear resistant sheet ranges from 530 to 580 HBW.
This high hardness level provides significantly better wear resistance compared to NM400 and NM500 grades.
What is the difference between NM550 wear resistant sheet and NM500?
The main differences between NM550 wear resistant sheet and NM500 include:
Hardness: NM550 (530–580 HBW) vs NM500 (480–530 HBW)
Wear Resistance: NM550 performs better in extreme abrasion conditions
Toughness: NM500 has slightly better impact resistance
Application: NM550 is used in more severe wear environments
Is NM550 wear resistant sheet suitable for welding?
Yes, NM550 wear resistant sheet can be welded, but special precautions are required:
Preheating: 150–250°C
Use low-hydrogen electrodes
Control cooling speed after welding
Proper welding procedures help prevent cracking and ensure structural integrity.
Is NM550 wear resistant sheet difficult to process?
Due to its high hardness, NM550 wear resistant sheet is more difficult to process than standard steel:
Cutting: Laser or plasma cutting recommended
Bending: Limited cold forming capability
Machining: Requires specialized tools
What are the main applications of NM550 wear resistant sheet?
NM550 wear resistant sheet is widely used in:
Mining equipment (dump trucks, crushers)
Construction machinery (excavator buckets, loaders)
Cement plants (chutes, hoppers)
Power plants (coal and ash handling systems)
It is ideal for applications with extreme abrasion and minimal impact.
How long does NM550 wear resistant sheet last?
Compared to NM500, NM550 wear resistant sheet can extend service life by 30% to 50%, depending on working conditions.
This results in:
Reduced downtime
Lower maintenance costs
Improved operational efficiency
What is the chemical composition of NM550 wear resistant sheet?
Typical chemical composition includes:
Carbon (C): ≤0.35%
Manganese (Mn): ≤1.70%
Chromium (Cr), Molybdenum (Mo), Nickel (Ni): added for strength and wear resistance
Exact composition may vary by manufacturer and production process.
Is NM550 wear resistant sheet more expensive than NM500?
Yes, NM550 wear resistant sheet is generally 10–30% more expensive than NM500.
However, it offers:
Longer service life
Lower replacement frequency
Better long-term cost efficiency
What are the common sizes of NM550 wear resistant sheet?
Typical dimensions include:
Thickness: 6mm – 80mm
Width: 1500mm – 3000mm
Length: 3000mm – 12000mm
Custom sizes and cutting services are usually available from suppliers like GNEE Steel.
How to verify the quality of NM550 wear resistant sheet?
To ensure you are purchasing genuine NM550:
Check Mill Test Certificate (MTC)
Request hardness testing reports
Use third-party inspection (SGS, BV)
Confirm production process (Q&T)
Is NM550 wear resistant sheet suitable for high-impact environments?
NM550 wear resistant sheet is primarily designed for high abrasion, not heavy impact.
If your application involves:
Strong impact loads
Low temperature conditions
Can NM550 wear resistant sheet replace Hardox 550?
Yes, NM550 wear resistant sheet is often used as a cost-effective alternative to Hardox 550 in many applications.
However, buyers should ensure:
- Equivalent hardness range
- Stable quality control
- Verified performance
NM550 armored steel plate Products image
GNEE group team photo
GNEE group customer visit
Our products have undergone strict quality testing and come with professional certificates. If you have any questions about NM550 Wear Resistant Sheet, please feel free to inspect.
Relying on many first-class equipment, such as CNC Shearing machine, Press Brake machine, Straightening machine, Roll Bending machine, Flat Bar Machine, Deburring machine etc, GNEE STEEL could provide various semi-productsand extensive forming services to customers.
GNEE STEEL PROCESSING
1.CTL & SL SERVICE (141 SETS)
Currently, GNEE STEEL has imported manyadvanced CTL/SL equipment from Italy and Korea and could provide customized CTL/SL services from cold rolled stainless steel and carbon steel to hot rolled stainless steel and carbon steel as well as strips and ultra-wide sheet.
CTL FACILITIES
Max Length:16500mm
Max Width:2200mm
Max Thickness:25.4mm
Max Yield Strength:1500Mpa
SL FACILITIES
Max Width:2200mm
Max Thickness:18mm
Max slit Quantity:31
Max Yield Strength:1200Mpa
2.CUTTING SERVICE
GNEE STEEL imported lots of advanced cutting machines from Germany, Sweden, America and Japan, including plasmas cutting machine, water jet cutting machine, laser cutting machine, flame cutting machine and saw machine. In order to meet customers' diversified needs, GNEE STEEL also adopts nest working multi-cutting methods and intensive production to improve production capacity and save costs for the customers.
Laser Cutting Machine
Max Cutting Length:40,000mm
Max Width:4,600mm
Max Thickness:100mm
Flame Cutting Machine
Max Cutting Length:40,000mm
Max Width:8,000mm
Max Thickness:500mm
Plasmas Cutting Machine
Max Cutting Length:30,000mm
Max Width:5,000mm
Max Thickness:100mm
Water-jet Cutting
Max Cutting Length:12,000mm
Max Width:4,010mm
Max Thickness:250mm
3.FORMING SERVICE
Steel Plate Roll Bending
Maximum Rolling Thickness: up to 200mm
Maximum Width: 4200mm
Automatic Bending Machine-Press Brake
Max Bending Capability:3000Ton
Max Bending Length:15,000mm
Expert in Bending High-Strength & Wear-Resistant Steels
Punching Machine
Max Width:3,070mm
Max Thickness:8mm
Max Pressure:250t
BEVELING SERVICE
GNEE STEEL beveling platform has edge milling machine, edge planer, flame / plasma groove cutting machine, flame groove cutting robot, desktop chamfering machine, gantry planerand other advanced equipment to provide customers with parts prefabrication services,daily processing of V-type, Y-type, X-type and U-type grooves, and guarantee subsequent processes such as welding and assembly of products.
Milling：
Max Cutting Length:18,000mm
Max Width:4500mm
Max Thickness:120mm
Beveling:
Max Length:16,000mm
Max Thickness:80mm
MACHINING SERVICE
GNEE STEEL owns CNC Portal-type Boring and Milling machine,CNC Floor-type Boring and Milling machine, Vertical Precision 5-axis Milling Machine, Portal-type Planer, Vertical Lathe, Cylindical Grinding machine, Hydraulic Planer and CNC Lathe and could provide fine machining of large spare parts and structural parts for customers.
Gantry Type Boring & Milling Maching Center
Max Length:48000mm
Max Width:12500mm
Max Height:8000mm
Max Diameter:10500mm
Deep-hole Drilling Equipment
Max Driling Depth:1,100mm
Max Bore Diameter:φ80mm
Max Diametar:φ4,500mm
MMulti-hole Drilling Equipment
Max Length:13,000mm
Max Width:10,000mm
Max Bore Diameter:φ105mm
Max Drilling Depth:250mm
Floor Boring And Milling Machine
Max Length:24,000mm
Max Height:8,000mm
Turntable Dimensions:9x5m
Vertical Lathe
Max Height:6,000mm
Max Diametar:φ22,00mm
Automated Edge Milling Machine
The Automated Edge Milling Machine is a leading product in heavy-duty milling equipment. It is primarily used for weld groove preparation (beveling) on large-format plates made of stainless steel, carbon steel, and special steel grades. It can process plates with a maximum thickness of up to 90mm, a length of 16 meters, and a width of 4 meters.
It is equipped with dual milling units and a fully automatic milling cutter head changing system, enabling automated 4-edge beveling. Its standout feature is the profiling technology used when milling wavy plates and irregularly shaped products, which ensures absolute consistency of the groove after milling.
Utilizing specially designed milling cutter heads, it can execute highly difficult and complex groove profiles in a single pass.
Materials: Plain carbon steel, pressure vessel steel, wear-resistant steel, high-strength steel, stainless steel, nickel-based alloys, etc.
Width: 1200 - 4200 mm
Length: 5800 - 16000 mm
Thickness: 5 - 90 mm
Weight: Up to 35 tons
This edge milling machine is the world's premier automated bevel milling equipment. With its excellent structural design and advanced data algorithms, it achieves full automation from plate detection to the actual milling process, significantly improving processing efficiency while guaranteeing high precision.
- Processing Accuracy
Length accuracy: ±1mm when L < 10m; ±2mm when L > 10m;
Width accuracy: ±1mm;
Diagonal accuracy: ±2mm;
Root face accuracy (blunt edge): ±1mm for Y-grooves; +0.5mm for X-grooves.
- Processing Efficiency
The processing efficiency is more than 10 times that of conventional edge milling or edge planing equipment.
HEAT TREATMENT
Heat Treatment Furnace
Max Furnace Size:36x12x13.5m
Max Rated Temperature:1100℃
Max Loading Capacity:800t
Heat Treatment of Pressure Vessels
Heat Treatment of Mining Equipment
Heat Treatment of Tube Sheet
Heat Treatment of Pressure Vessel Head
Case : Steel Plates Supply for 100,000m³ Full Containment Ammonia Storage Tank Project
GNEE STEEL is currently participating in the procurement phase of a 100,000m³ full containment ammonia storage tank project, supplying high-quality steel plates for critical tank components. Due to the corrosive nature of ammonia and the risk of Ammonia Stress Corrosion Cracking (SCC), the project requires strict metallurgical control of materials according to EN 10028-3 standards.
One of the most important technical requirements of this project is the strict limitation of the actual Yield Strength (Re) for all NL2 grade materials. To prevent SCC risks in ammonia storage environments, the actual yield strength must not exceed 390 MPa, regardless of the nominal values specified in the standard or plate thickness ranges. This requirement places higher demands on steelmaking process control, heat treatment stability, and material testing.
Raw high-strength steel plates ready for the 100,000 m³ full containment ammonia storage tank production
Project Materials and Technical Requirements
The project mainly uses P355NL2 and P275NL2 normalized pressure vessel steel plates, which are widely applied in low-temperature storage tanks due to their excellent toughness and weldability.
Key technical specifications include:
- Material grades: P355NL2 and P275NL2 (Normalized)
- Yield strength: Standard minimum / Maximum limited to 390 MPa
- Hardness: ≤ 225 HBW in base material
- Impact testing: Charpy-V notch test at -50°C, minimum 27J
- Certification: EN 10204 3.1 certificate, with optional 3.2 certification
These strict requirements ensure that the steel plates maintain stable mechanical properties and high resistance to ammonia-induced stress corrosion during long-term operation.
Precision rolling and forming of steel plates into curved sections for the 100,000 m³ ammonia storage tank.
Project Plate Quantities and Thickness Distribution
The total steel demand for this ammonia storage tank project is several thousand tons, mainly distributed across different tank sections:
P355NL2 – Inner & Outer Tank Shell Plates
- Lower shell courses: 50 mm thickness – approx. 2,000 tons
- Middle shell courses: 25 mm thickness – approx. 1,400 tons
- Upper shell courses: 10 mm thickness – approx. 500 tons
P275NL2 – Tank Bottom Plates
- Thickness: 10–15 mm – approx. 750 tons
P275NL2 – Suspended Roof Structure
- Thickness: 5–8 mm – approx. 180 tons
S275JR – Outer Roof (Ambient Structure)
- Thickness: 10 mm – approx. 450 tons
To improve tank fabrication efficiency and reduce circumferential welds, the project also requires wide steel plates to minimize welding joints, which helps reduce the potential risk of SCC in ammonia service conditions.
Formed steel segments wrapped and racked for protection, ready for 100,000 m³ ammonia storage tank assembly.
GNEE STEEL provides high-precision steel plate rolling and cylinder fabrication solutions for tank manufacturers worldwide. Send us your plate specifications or fabrication drawings for a fast quotation.
| TYPE | GRADE | SPECIFICATIONS |
| Carbon Steel / Low Alloy Coil | Q235A/B/C/D/Q355B(Q345B)/C/D/E/SS400/SAPH400-C/ASTMA283Grade C |
0.7~2.0*1250/1500mm*C 2.3~19.5*1250/1500/1800/2000mm*C |
| Medium Heavy Plate | Q235B/Q355B(Q345B)/C/D/E | 6.0-200x150mm-4000mmxL |
| Vessel Plate |
Q245R/Q345R/HP295/SA516MGR485/SA516GR70/P355NL2/P275NL2/ S275JR//SPV490/ASTM A537 Class 1/Class 2 |
2.5-120x1500mm-3000mmxL |
| High Strength Steel |
510L/610L/700L/750L/BS600MCK4/BS700MCK2/BS700MCK4/ BS960E/BWELDY700QL2/L4/BWELDY960QL4/HG60D/70D/785D/ Q460D/Q550D/690D/690E/TQ600MCD/TQ700MCD/S700MCD/ WYS600/700/STRENX700MCE/Q490E/Q490D |
1.2-60x 1500mm-2500mmxL |
| Patterned Steel | HQ235A|B | 1.2-60x 1500mm-2500mmxL |
| Wear-resistance Steel |
NM360/400/450/500/NM300TP/400TP/450TP/ ABREX400/450/500/B-HARD450XKY/ CREUSABRO4800/8000/EH C400LE/450LE/500LE/ |
3.0-50x1250mm-3300mmxL |
| Cold Rolled Coil | DC01/RECC/REDT/SPCC/ST12 | 0.5-3.0x1250mm-1500mmxC |
| Galvanized Plate | DC51D+AZ/DC51D+Z/DX51D+Z/SGH340+Z275/Z275/Z120/S350GD+ZM275 | 0.45-3.0x1250mm-1500mmxC |
| Pickled Coil | DD11/SPHC | 2.0-6.0x1500xC |
Stainless Steel Material and Surface Specifications
| TYPE | GRADE | THICKNESS | SURFACE |
| Austenitic | 304/304H/304L/304J1 | 0.25-150mm | 2B/BA/NO.4/8K/SB/HL/NO.1 |
| Austenitic | 321 | 0.4-80mm | 2B/BA/NO.4/8K/SB/HL/NO.1 |
| Austenitic | 316/316L/317L/316Ti | 0.3-80mm | 2B/BA/NO.4/8K/SB/HL/NO.1 |
| Austenitic | 201(J1/J2/J5) | 0.35-12mm | 2B/NO.1/1D |
| Ferrite | 430 | 0.4-3.0mm | 2B/BA/NO.4/8K/SB/HL |
| Ultra Pure Ferrite | 443 | 0.4-2.0mm | 2B |
| Ultra Pure Ferrite | 436L/439/444/441 | 0.5-3.0mm | 2B/2D |
Special Steel / Nickel Base Alloy
| TYPE | GRADE | GRADE (ASTM) | GRADE (EN) | THICKNESS |
| Heat-resistant Steel | 309S | S30908 | 1.4833 | 0.5-40mm |
| Heat-resistant Steel | 310S | S31008 | 1.4845 | 0.5-40mm |
| Duplex Stainless Steel | 2101 | S32101 | 1.4162 | 1.5-50mm |
| Duplex Stainless Steel | 2304 | S32304 | 1.4362 | 3.0-50mm |
| Duplex Stainless Steel | 2205 | S32205/S31803 | 1.4462 | 0.5-60mm |
| Duplex Stainless Steel | 2507 | S32750 | 1.4410 | 1.0-60mm |
| Super Austenitic-Steel | 904L | N08904 | 1.4539 | 0.6-50mm |
| Super Austenitic-Steel | 254SMO | S31254 | 1.4547 | 0.5-50mm |
| Super Austenitic-Steel | 1.4529 | N08926 | 1.4529 | 0.5-50mm |
| Super Austenitic-Steel | AL-6XN | N08367 | 1.4478 | 0.5-50mm |
| Nickel Base Alloy | Alloy 31 | N08031 | 1.4562 | 1.0-50mm |
| Nickel Base Alloy | 800 | N08800 | 1.4876 | 0.8-50mm |
| Nickel Base Alloy | 800H | N08810 | 1.4958 | 0.8-50mm |
| Nickel Base Alloy | 800HT | N08811 | 1.4959 | 0.8-50mm |
| Nickel Base Alloy | Alloy 28 | N08028 | 1.4563 | 1.0-20mm |
| Nickel Base Alloy | Alloy 20 | N08020 | 2.4660 | 1.0-20mm |
| Nickel Base Alloy | 825 | N08825 | 2.4858 | 0.8-40mm |
| Nickel Base Alloy | C276 | N10276 | 2.4819 | 0.5-50mm |
| Nickel Base Alloy | C22 | N06022 | 2.4602 | 1.0-50mm |
| Nickel Base Alloy | 625 | N06625 | 2.4856 | 0.8-20mm |
| Nickel Base Alloy | 400 | N04400 | 2.4360 | 1.0-20mm |
| Nickel Base Alloy | 600 | N06600 | 2.4816 | 1.0-50mm |
| Nickel Base Alloy | Pure Ni 201 | N02201 | 2.4061 | 0.5-20mm |
| Titanium | TA1 | Gr.1 | Class 1 | 0.5-50mm |
| Titanium | TA2 | Gr.2 | Class 2 | 0.5-50mm |
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