Weather resistant steel plate, that is, atmospheric corrosion-resistant steel, refers to low-alloy high-strength steel with good corrosion resistance in the atmosphere by adding a small amount of corrosion-resistant alloying elements, such as copper, chromium, nickel, etc. In addition to good weather resistance, weather resistant steel plates also have excellent mechanical and welding properties.
The atmospheric corrosion resistance of weather resistant steel plate is 2 to 8 times that of ordinary carbon steel, and the longer the service time, the more prominent the corrosion resistance. The principle is that after outdoor exposure, a relatively dense rust layer can be formed on the surface of the steel, which acts as a protective layer to inhibit corrosion and weather.
Weather resistant steel plate is divided into "high weather resistance" and "welding weather resistance", and "GNH" and "NH" are added after the original carbon structural steel grade. In the national standard GB/T 4171-2008 Weathering Structural Steel, the following weather resistant steel plate grades are specified:
| Category | Grade | Production Method |
| High weather resistant steel plate | Q295GNH、Q355GNH | hot rolled |
| Q265GNH、Q310GNH | cold rolled | |
| Welding weather resistant steel plate | Q235NH、Q295NH、Q355NH、Q415NH、Q460NH、Q500NH、Q550NH | hot rolled |
Weather resistant steel plate is suitable for steel plates, strips and profiles for structural purposes such as vehicles, bridges, containers, buildings, towers, etc. It can be used for bolting, riveting and welding. structural parts.
Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!
