In high-stakes engineering where strength and endurance converge, Q460NH steel plate stands as a pinnacle of innovation for welded structures battling relentless atmospheric assaults. Crafted under the Chinese national standard GB/T 4172-2000 for atmospheric corrosion-resisting steel in welded applications, Q460NH develops a tenacious protective patina, fortifying against rust in the harshest climates.
GB/T 4172 delineates low-alloy steels primed for welding, emphasizing fracture toughness and corrosion mitigation to streamline fabrication and upkeep. These alloys thrive in exposed welded frameworks under dynamic loads and corrosive influences. The "Q460NH" moniker signifies a minimum yield strength of 460 MPa ("Q460") paired with "NH" for exceptional atmospheric corrosion resistance, often in subtypes like Q460NH-D for amplified low-temperature ductility. This ultra-high-strength grade optimizes load-bearing capacity with cost-effectiveness, suiting heavy-duty welded constructs.
Key Specifications
Thickness Range: 4mm to 150mm
Width: Up to 3,500mm
Length: Up to 12,000mm
Surface Finish: Hot-rolled, mill edge or precision trimmed
Delivery Condition: As-rolled, normalized, or quenched and tempered
Q460NH steel plate Chemical composition(%)
|
C |
Si |
Mn |
P |
S |
Cu |
Ni |
Cr |
|
0.12 |
0.65 |
1.50 |
0.025 |
0.030 |
0.20-0.55 |
0.12-0.65 |
0.30-1.25 |
Q460NH steel plate Mechanical properties
|
Thickness (mm) |
||||
|
Q460NH |
≤ 16 |
> 16 ≤ 40 |
> 40 ≤ 60 |
>60 |
|
Yield strength (≥Mpa) |
460 |
450 |
440 |
440 |
|
Tensile strength (Mpa) |
570-730 |
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