Products Description
Q550NH Corten Steel Plate is another high-strength low-alloy (HSLA) steel, similar to other corten or weathering steel grades, but with a higher yield strength than Q450NQR1.
It's specifically designed for use in structural applications that require both strength and corrosion resistance in atmospheric environments.
Q550NH weathering steel plate specification
| Commodity | Corten Steel plate/sheet/corten A/B/ SPA-H corten steel price |
| characteristic | The surface of corten steel can form a coating of dark brown oxidation, which inhibits deeper penetration, to save the cost of need for painting and costly rust-prevention maintenance over the years. |
| Size | Thickness: 1.6mm-80mm |
| Width: 900mm-2100mm | |
| Length: 1m-11.8m | |
| What we could supply | Supply Coils directly |
| Decoil to sheet as per request length | |
| Can cut to any shape and process according to the drawing. | |
| Can weld to round, square, retangular pipe angle bar and etc. | |
| Certificate | ISO, SGS, MTC |
Q550NH steel chemical composition(%)
|
Grade |
Q550NH steel chemical composition(%) |
||||
|
C Max |
Si Max |
Mn Max |
P Max |
S Max |
|
|
China GB/T 4171 Q550NH |
0.16 |
0.65 |
2.0 |
0.025 |
0.030 |
Mechnical property for Q550NH corten steel
| Thickness (mm) | ||||
| Q550NH | ≤ 16 | > 16 ≤ 40 | > 40 ≤ 60 | >60 |
| Yield strength (≥Mpa) | 550 | 540 | 530 | 530 |
| Tensile strength (Mpa) | 620-780 | |||
Chemical composition for Q550NH corten steel (Heat Analysis Max%)
| Main chemical elements composition of Q550NH | |||||||
| C | Si | Mn | P | S | Cu | Ni | Cr |
| 0.16 | 0.65 | 2.00 | 0.025 | 0.030 | 0.20-0.55 | 0.12-0.65 | 0.30-1.25 |
Applications of China GB/T 4171 Q550NH Weather Resistant Steel Plate
Q550NH Weather Resistant Steel Plate are very extensive. It is widely used in vehicles, bridges, towers, containers, and other structural components exposed to long-term outdoor conditions.
This steel plate is a high-strength, low-alloy weathering steel, with typical mechanical properties including a yield strength of 550 MPa, tensile strength of 650–810 MPa, and elongation of 18–22%, maintaining excellent toughness and reliability even in low-temperature environments.
The surface of Q550NH steel naturally forms a dense oxide layer approximately 50–100 μm thick, effectively slowing further corrosion and providing a service life of 20–30 years in urban or industrial conditions, and over 25 years in coastal or high-humidity environments.
Thanks to its high strength, corrosion resistance, and low maintenance requirements, GB/T 4171 Q550NH steel plates are widely applied in bridge main beams, railway vehicle underframes, container structures, tower supports, building frames, and large outdoor facilities, making it a reliable choice of weathering steel for engineering and construction projects.
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