GBT 4171 Q355NH/GNH Corten&Weathering Steel Plate
GB/T 4171 Q355NH/GNH plate is a highly weather-resistant carbon steel material used in building and engineering structures. We offer certified industrial supply.
- Excellent weather and corrosion resistance
- Various sizes and thicknesses available
- Meets international quality standards
GBT 4171 Q355NH/GNH Corten&Weathering steel description
GB/T 4171 Q355NH/GNH weathering steel plate is a high-strength carbon steel widely used in buildings, bridges, and engineering structures. We are a Chinese manufacturer and major exporter of Q355NH/GNH steel plate, featuring excellent weldability and notch toughness. With thicknesses ranging from 8mm to 38mm, our plates comply with the GB/T 4171 standard and are ideal for contractors and manufacturers requiring reliable weathering steel. Contact our factory for availability of Q355NH/GNH steel plate or to request a large quantity quote.
GBT 4171 Q355NH/GNH Corten&Weathering steel Data Sheet
| GBT 4171 Q355NH/GNHChemical Composition | ||
| Element | Q355NH | Q355GNH |
| Carbon (C), Max | ≤0.16 | ≤0.12 |
| Silicon (Si) | ≤0.50 | 0.10-0.40 |
| Manganese (Mn) | 0.50-1.50 | 0.20-0.50 |
| Phosphorus (P), Max | ≤0.030 | ≤0.030 |
| Sulfur(S) | ≤0.030 | ≤0.025 |
| Copper(Cu) | 0.25-0.55 | 0.25-0.55 |
| Chromium(Cr) | 0.40-0.80 | 0.40-0.80 |
| Nickel(Ni) | ≤0.65 | ≤0.65 |
| other(Nb,V,Ti) | tiny | tiny |
| GBT 4171 Q355NH/GNH – Tensile Requirements | ||
| Property | Q355NH | Q355GNH |
| Yield Strength (ReH) | ≥355 MPa (for thickness ≤16mm) | ≥355 MPa (for thickness ≤16mm) |
| ≥345 MPa (16-40mm) | ≥345 MPa (16-40mm) | |
| ≥335 MPa (40-60mm) | ≥335 MPa (40-60mm) | |
| Yield Strength, min, ksi (MPa) | 490-630 MPa | 490-630 MPa |
| Elongation (A) | ≥22% | ≥22% |
| Impact Toughness | ≥34 J at -20°C (Charpy V-notch) | ≥34 J at -20°C (Charpy V-notch) |
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GBT 4171 Q355NH/GNH Corten&Weathering steel Application
GB/T 4171 Q355NH/GNH weathering steel plates are widely used in various industries, including construction, bridges, and engineering structures, due to their high strength and resistance to atmospheric corrosion. In the construction sector, Q355NH/GNH plates are suitable for curtain walls, steel structural frames, and towers due to their excellent toughness and weldability. In infrastructure construction, especially in coastal or humid environments, such as bridges and elevated structures, Q355NH/GNH effectively resists corrosion. The railway industry utilizes these plates to manufacture freight cars and track infrastructure to withstand harsh climates. Q355NH/GNH is also used in landscape structures, sculptures, and outdoor fixtures due to its attractive and durable natural rust layer. Its resistance to corrosion and mechanical stress makes it a reliable choice for engineering contractors and steel structure manufacturers worldwide.
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