GB/T 4171 Q355GNH weathering steel is a high-performance atmospheric corrosion-resistant steel widely used in vehicles, bridges, towers, containers, and other structural applications.

Gnee is a professional GB/T 4171 Q355GNH weathering steel supplier in China, maintaining a large monthly stock to meet customer demands.
Chemical Composition (%)
| Grade | C Max | Si | Mn Max | P | S Max |
|---|---|---|---|---|---|
| GB/T 4171 Q355GNH | 0.15 | 0.25–0.75 | 1.0 | 0.07–0.15 | 0.02 |
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Minimum Elongation (%) |
|---|---|---|---|
| GB/T 4171 Q355GNH | 345–355 | 490–630 | 22 |
Specifications & Terms
Packaging: Standard export seaworthy packing or customized according to client requirements
Delivery Time: 30–50 days (7 days for stock goods)
Loading Ports: Shanghai, Tianjin, Qingdao
Supply Capacity: 5000 MT per month
Minimum Order Quantity (MOQ): 1 piece
Welcome to purchase GB/T 4171 Q355GNH weathering steel from BBN. We provide high-quality, cost-effective solutions for your structural steel needs, including sheets, plates, and custom profiles.




















