Q355NH is a high-strength weathering steel plate widely used in infrastructure and heavy engineering applications. According to GB/T 4171, Q355NH provides a minimum yield strength of 355 MPa while offering enhanced atmospheric corrosion resistance.

Compared with conventional structural steel, Q355NH helps reduce maintenance requirements by forming a protective rust layer during outdoor exposure. Its combination of strength, toughness, and weldability makes it one of the most commonly used Chinese weathering steel grades.

CEHE STEEL supplies Q355NH weathering steel plates for global fabrication and construction projects.