Products Description
Q355GNH High Strength Low Alloy Carbon Steel Rectangular Pipe is a weathering steel pipe produced according to the GB/T 4171-2008 standard, belonging to low-alloy high-strength structural steel with exceptional atmospheric corrosion resistance.
Its yield strength is no less than 355 MPa, and the tensile strength ranges from 470 to 630 MPa. Q355GNH steel pipe is widely used in steel structures exposed to the atmosphere for extended periods, especially in marine environments, chemical plants, bridges, towers, and other engineering projects that require long-term corrosion resistance.
For example, in marine environments, due to its corrosion resistance, it can effectively withstand humid air and salt spray corrosion, significantly extending its service life.
In chemical plants, Q355GNH steel pipe can endure acid and alkaline environments while maintaining stable strength and excellent oxidation resistance.
In projects like bridges and towers, its high strength (tensile strength can reach up to 630 MPa) and excellent weldability allow it to perform well under extreme weather conditions, ensuring long-term stability, safety, and reliability of the structure.
Additionally, the low carbon equivalent of Q355GNH ensures that it does not easily crack during welding, and the welded joints are stable, making it especially suitable for large-span steel structures.
Mechnical property for Q355GNH corten plate
| Thickness (mm) | ||||
| Q355GNH | ≤ 16 | > 16 ≤ 40 | > 40 ≤ 60 | >60 |
| Yield strength (≥Mpa) | 355 | 345 | - | - |
| Tensile strength (Mpa) | 490-630 | |||
Chemical composition for Q355GNH corten plate (Heat Analysis Max%)
| Main chemical elements composition of Q355GNH corten plate | |||||||
| C | Si | Mn | P | S | Cu | Ni | Cr |
| 0.12 | 0.20-0.75 | 1.00 | 0.07-0.15 | 0.020 | 0.25-0.55 | 0.25-0.55 | 0.30-1.25 |
Products Application
The weather resistance of Q355GNH high weathering steel is 2~8 times that of ordinary carbon steel, and the coating property is 1.5~10 times that of ordinary carbon steel.
Q355GNH high weathering steel is used to manufacture structural parts such as containers, railway vehicles, oil derricks, seaport buildings, oil production platforms and containers containing hydrogen sulfide corrosive medium in chemical and petroleum equipment.
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