Professional And Certified GB/T Q415NH Corten Steel

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GB/T Q415NH Corten Steel

GB/T Q415NH Corten Steel premium-grade material forms a self-protecting oxide layer when exposed to weather cycles, eliminating the need for protective coatings while developing a distinctive architectural patina. With its enhanced yield strength and excellent durability, Q415NH is ideally suited for demanding applications including long-span bridges, high-rise building facades, offshore structures, and heavy industrial equipment where both structural performance and aesthetic appeal are critical.

Product Introduction: GB/T Q415NH Corten Steel

Product Description

GB/T Q415NH represents the high-performance tier in China's weathering steel series, offering 6-10 times better corrosion resistance than conventional carbon steels. The steel's optimized alloy composition enables rapid formation of a dense, stable rust layer that effectively withstands aggressive environments including coastal, industrial and urban atmospheres. Featuring remarkable yield strength and excellent low-temperature toughness (-50°C impact resistance), Q415NH maintains outstanding weldability and formability while developing its characteristic weathered appearance. This makes it particularly suitable for critical structural applications where maximum durability and reduced maintenance are required.

Product Information Sheet

Standard: GB/T 4171-2020 (Chinese Weathering Steel Standard)

Grade Designation: Q415NH ("NH" indicates耐候钢/weather-resistant)

Key Mechanical Properties:

Yield Strength: ≥415 MPa

Tensile Strength: 550-710 MPa

Elongation: ≥20%

Charpy Impact: ≥34J at -50°C

Chemical Composition (%):

C≤0.12, Si 0.15-0.65, Mn 0.90-1.60

P 0.070-0.150, S≤0.020

Cu 0.25-0.55, Cr 0.45-0.90, Ni 0.12-0.65

Available Forms:

Thickness: 3-150mm (plates), 1.5-12mm (strips)

Width: 1500-3200mm (hot-rolled)

Surface Options: Mill scale, pre-weathered, or blasted finish

Advantages & Benefits

Q415NH Corten Steel delivers exceptional value through its maintenance-free corrosion protection system, reducing lifecycle costs by 60-80% compared to painted alternatives. The material's ultra-high strength enables lighter structural designs with 25-35% weight savings while meeting the most stringent safety requirements. Environmentally superior, it eliminates VOC emissions from painting processes and is fully recyclable. Particularly effective in extreme environments, its performance has been verified in offshore platforms (CX corrosion class) and industrial pollution zones. The evolving patina creates architecturally dynamic surfaces that develop rich, variegated colors over time, making it ideal for signature architectural projects worldwide.

Exhibition

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