Products Description
Q355GNH steel channel is a high-strength low-alloy weathering steel that complies with the GB/T 4171-2008 standard, offering excellent atmospheric corrosion resistance.
Q355GNH steel channel uses low-alloy high-strength steel as the base and incorporates elements such as copper (Cu), nickel (Ni), and chromium (Cr) to effectively enhance the material's corrosion resistance, wear resistance, and weldability, making it particularly suitable for steel structures exposed to natural environments for long periods.
Its yield strength is no less than 355 MPa, and its tensile strength ranges from 470 MPa to 630 MPa, ensuring exceptional strength and stability even under extreme load conditions.
Q355GNH steel channel is widely used in the supporting structures, deck panels, and piers of bridges, especially in bridge engineering that needs to bear significant traffic loads. Its high strength and corrosion resistance make it ideal for long-term exposure to harsh conditions such as wind, rain, and salt spray corrosion.
Q355GNH steel chemical composition(%)
| Grade |
Q355GNH steel chemical composition(%) |
||||
|
C Max |
Si |
Mn Max |
P |
S Max |
|
|
Q355GNH |
0.15 |
0.25-0.75 |
1.0 |
0.07-0.15 |
0.02 |
Q355GNH steel mechanical property
|
Grade |
Q355GNH steel mechanical property |
||||
|
Yield Strength(MPa) |
Tensile Strength(MPa) |
% Elongation min |
|||
|
Q355GNH |
345-355 |
490-630 |
22 |
||
Products Application
Q355NH application of weathering steel is mainly used for railway, vehicles, Bridges, pylons and other steel structures exposed to the atmosphere for a long time.
Used for manufacturing containers, railway vehicles, oil derricks, port buildings, oil production platforms and chemical and petroleum equipment containing hydrogen sulfide corrosive medium containers and other structural parts.
8. GB/T4171-2008, high weathering steel and welding weathering steel, the grade of this steel by representing the "yield strength" letter Q and "high weather resistance" letter GNH, "weather resistance" letter NH and steel quality grade (A, B, C, D, E) in order, such as Q355GNHC, Q46ONHD.
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