NM450 is a high‑hardness wear‑resistant steel under the GB/T 24186 standard. With a nominal hardness of 450 HBW, NM450 provides significantly enhanced abrasion resistance compared with NM360 and NM400, making it suitable for severe wear environments.
It is widely used in mining machinery, loader buckets, dump truck liners, cutting edges, and industrial wear plates where high hardness and impact resistance are required.
🟧 Standards
GB/T 24186 – Wear Resistant Steel
Related International Grades: Hardox 450, JFE EH450, AR450
🟧 International Wear‑Resistant Steel Comparison Table
Country
Standard
Common Grades
China
GB/T 24186
NM360, NM400, NM450, NM500
Sweden
SSAB Hardox
Hardox 400, Hardox 450, Hardox 500
Japan
JFE EH Series
JFE EH360, EH400, EH450
Europe
EN 10051 (hot‑rolled coil tolerance)
Used for dimensional reference
International
AR Steel (generic)
AR400, AR450, AR500
🟧 Available Grades
NM450
🟧 Product Specifications & Available Sizes
Dimensions
Thickness: 3 – 20 mm
Width: 1000 – 2000 mm
Coil ID: 508 mm / 610 mm
Coil OD: 900 – 2000 mm
Coil Weight: 3 – 15 MT
Regular Sizes (mm)
Size
Size
3.0 × 1500 × C
5.75 × 1800 × C
3.5 × 1500 × C
5.75 × 2000 × C
3.75 × 1500 × C
7.75 × 2000 × C
4.5 × 1500 × C
7.5–11.75 × 1500 × C
🟧 Chemical Composition (NM450 – typical)
Element
Max (%)
C
0.30
Mn
1.60
P
0.025
S
0.010
Si
0.50
Cr
1.30
Mo
0.60
B
0.004
🟧 Mechanical Properties (NM450 – typical)
Property
Value
Hardness
450 HBW (nominal)
Yield Strength
≥ 1100 MPa
Tensile Strength
≥ 1350 MPa
Elongation
≥ 10%
Impact Toughness
High for severe wear applications
🟧 Physical Properties
Density: 7.85 g/cm³
Modulus of elasticity: 210 GPa
Thermal expansion: 12×10⁻⁶ /K
🟧 Manufacturing Processes
Hot rolling
Quenching & tempering
Leveling
Pickling (optional)
Slitting / Cutting to length
Surface oiling
🟧 Primary Industry Usage
Mining equipment
Loader and excavator buckets
Dump truck liners
Bulldozer blades
Cutting edges and wear strips
Industrial wear plates and liners
🟧 Why Use NM450 Wear Resistant Steel Coil
Higher hardness and wear resistance than NM360 and NM400
Excellent impact resistance for severe wear environments
Long service life in mining and heavy machinery applications
Good weldability and processing performance
🟧 Why Choose WelSteels
Full range of NM‑series wear‑resistant steel coils
