Q355NH Corrosion Resistant Steel Sheet

Q355NH steel plate under China GB/T 4171 standard, it is a kind of weathering steel. Q355NH weathering steel plate is the high tensile strength weathering steel plate, it has 490-630 Mpa tensile strength.

Q355NH steel plate comprehensive performance: Q355NH steel plate has good weldability and low temperature impact toughness, suitable for architecture, artifacts such as weather resistance of weldments.

Applications of GB/T 4172 Q355NH Steel Plate

Q355NH’s weldability and endurance make it a staple in corrosion-prone welded structures:

• Bridges and Overpasses: Beams, trusses, and handrails withstand traffic vibrations and salt spray.
• Architectural Welded Frames: Curtain walls, staircases, and sculptures with a natural rust finish.
• Marine and Container Builds: Welded panels for ships, railcars, and storage units in humid or salty air.
• Industrial Towers: Support structures for wind farms, chimneys, and transmission lines.
• Heavy Machinery: Welded chassis and booms in construction equipment exposed to weather.
• In industrial or coastal settings, Q355NH cuts downtime by avoiding frequent recoating.

Advantages of GB/T 4171 Q355NH Weathering Steel 

Selecting GB/T 4172 Q355NH steel plate unlocks key efficiencies:

• Advanced Corrosion Shielding: Patina formation slashes degradation by 70-80%, boosting lifespan.
• Weld Optimization: Low CEV minimizes defects, speeding up assembly by 20-30%.
• Material Efficiency: Higher yield enables slimmer profiles, reducing weight and costs by 10-20%.
• Sustainability Edge: Fewer coatings mean lower emissions and easier recycling.
• Global Compatibility: Aligns with equivalents like EN 10025-5 S355J2WP or ASTM A588 for seamless integration.