Q415NH is a high-strength weathering steel under China's GB/T 4171 standard, offering 415MPa yield strength and enhanced atmospheric corrosion resistance. Its Cu-P-Cr-Ni alloy system forms a stable protective patina, providing 5-10× better durability than carbon steel in harsh environments.
Key Features:
✔ High load capacity for demanding structures
✔ Excellent weldability & formability
✔ Self-protecting rust layer reduces maintenance
✔ Performs well in coastal/industrial atmospheres
Typical Applications:
Long-span bridges
Offshore platforms
Heavy-duty containers
Critical infrastructure
Ideal where both strength and weather resistance are crucial, Q415NH outperforms lower grades (Q355NH/Q295NH) in extreme conditions while maintaining cost efficiency.
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