GB/T 4171 welded weather-resistant structural steel grades include Q235NH, Q295NH, Q355NH, Q415NH, Q460NH, Q500NH, Q550NH. There products have good weldability and they are mainly used in structures such as vehicles, bridges, containers, buildings or other structural parts. Compared with high weather-resistant steel Q355GNH, they have better welding performance.
Product specifications:
Shapes: plate, sheet, strip, angle and steel section
Grades |
Quality level |
Specification/mm |
|
Sheet and strip |
Medium plate |
|
Q235NH |
A
B
C
D
E |
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q295NH |
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q355NH |
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q415NH |
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q460NH |
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q500NH |
1.5-19×800-1600 |
6-50×1600-3250 |
|
Q550NH |
1.5-19×800-1600 |
6-50×1600-3250 |
Features of welded weather-resistant structural steel:
1. Weather-resistant steel plate is a kind of atmospheric corrosion-resistant steel, a low-alloy steel between ordinary steel and stainless steel.
2.Weather-resistant steel plate is made of plain carbon steel with a small amount of corrosion-resistant elements such as copper and nickel.
3. The performance of weather-resistant steel plate has the properties of high-quality steel such as toughness, ductility, forming, welding, abrasion, high temperature, fatigue resistance, etc.; weather resistance is 2 to 8 times that of ordinary carbon steel, and the coating property is 1.5 of that of ordinary carbon steel. ~10 times.
4. Features of weather-resistant steel plate: It has the characteristics of rust resistance, corrosion resistance and life extension, thinning and consumption reduction, and labor and energy saving.
5. Weather-resistant steel plate use: used for steel structures exposed to the atmosphere for a long time, such as railways, vehicles, bridges, and towers.
Welded weather-resistant structural 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 media in chemical petroleum equipment.
