Q355NH steel plate delivers unmatched resilience against atmospheric corrosion, making it a cornerstone for long-lasting infrastructure. Aligned with the Chinese national standard GB/T 4172-2000 for atmospheric corrosion-resisting steel optimized for welded constructions, Q355NH forms a robust protective patina that extends service life in challenging outdoor conditions.
The "Q355NH" grade indicates a minimum yield strength of 355 MPa ("Q355") combined with "NH" for superior atmospheric corrosion resistance, often available in variants like Q355NH-B or Q355NH-C for specific welded performance.
Key Specifications
Thickness Range: 3mm to 150mm
Width: Up to 3,500mm
Length: Up to 12,000mm
Surface Finish: Hot-rolled, with mill edge or trimmed options
Delivery Condition: As-rolled, normalized, or quenched and tempered as required
|
Grade |
Q355NH chemical composition(%) |
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|
C Max |
Si Max |
Mn |
P |
S Max |
|
|
China GB/T 4171 Q355NH |
0.16 |
0.5 |
0.5-1.5 |
0.030 |
0.030 |
|
Grade |
Q355NH mechanical property |
|
||
|
Yield Strength(MPa) |
Tensile Strength(MPa) |
% Elongation min |
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|
China GB/T 4171 Q355NH |
325-355 |
490-630 |
20 |
|
Q355NH weathering steel plate application:
Q355NH weathering steel plate is widely used in vehicle, bridge, tower, container and so on.
Q355NH weathering steel additional condition :
UT (Ultrasonic examination), AR(As Hot Rolled only), TMCP(Thermal Mechanical Control Processing), N(Normalized), Q+T(Quenched and Tempered), Z Direction Test(Z15, Z25, Z35) ,Charpy V-Notch Impact Test, HIC test, NDT, PWHT( Simulated Post Weld Heat Treatment), NACE0175, The Third Party Test (Such as SGS Test), Coated or Shot Blasting and Painting.
