Q355GNH weathering steel is a steel that increases the resistance to atmospheric corrosion by adding a small amount of alloy elements such as Cu, P, Cr, Ni, etc. to form a protective layer on the basic surface of the metal. The steel is composed of the lower limit of the yield strength of the Chinese pinyin "Q" and "GNH" of "yield strength" and "high weather resistance". It has five quality levels (A, B, C, D, E). Q355GNH hot rolled plate is mainly used in vehicles, containers, buildings, towers or other structural parts. Compared with welded weathering steel, it has better resistance to atmospheric corrosion. Available for steel plate thickness ≤20mm.
Q355GNH steel plate delivery status and implementation standards
The implementation standard of Q355GNH steel plate: GB/T-4171-2008.
Delivery status: hot rolling, controlled rolling, normalizing. The delivery status can be selected according to different needs, and can also be attached to the requirements of flaw detection standards, flaw detection level requirements, Z-direction performance requirements, classification society certification requirements, and the addition of special alloy elements. However, it needs to be communicated by both the supplier and the buyer, and be noted in the contract.
Q355GNH hot rolled plate specification
| Category |
Grade |
Size(mm) |
Pieces |
Weight(tons) |
Source |
| Weathering steel |
Q355GNHD |
14*1800*8100 |
1 |
1.602 |
Shanghai |
| Weathering steel |
Q355GNHD |
8*1800*8100 |
10 |
9.16 |
Shanghai |
| Weathering steel |
Q355GNHE |
10*3020*4720 |
1 |
1.119 |
Shanghai |
| Weathering steel |
Q355GNHE |
10*3020*5900 |
2 |
2.798 |
Shanghai |
| Weathering steel |
Q355GNHE |
10*3020*6000 |
4 |
5.688 |
Shanghai |
| Weathering steel |
Q355GNHE |
10*3020*5000 |
1 |
1.185 |
Shanghai |
| Weathering steel |
Q355GNHE |
10*3020*5700 |
1 |
1.351 |
Shanghai |
Mechanical properties of Q355GNH steel plate (MPa): yield strength: ≥325; tensile strength: between 490-630; elongation %: ≥21
Q355GNH hot rolled plate uses:
Q355GNH hot rolled plates are mainly used for structures such as vehicles, containers, buildings, bridges or other structural parts. Compared with weldable weathering steel
Q355NH, it has better atmospheric corrosion resistance performance.
