Q235NH Weathering Steel Tube - Weldable, Long-Life Structural
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Gnee Steel (Tianjin) Co., Ltd. is one of the most professional q235nh weathering steel tube - weldable, long-life structural manufacturers and suppliers in China. Welcome to wholesale customized q235nh weathering steel tube - weldable, long-life structural at competitive price from our factory. Good service and quality products are available.
Products Description
Our Q235NH weathering steel tube is a top - notch product tailored for demanding structural applications. Adhering to the strict GB/T 4171 standard, it combines outstanding performance with a long service life.
Chemical Composition
The tube's unique corrosion - resistance comes from its well - balanced chemical makeup. Carbon content is limited to 0.13% at most, which helps maintain good weldability. Silicon (0.1 - 0.4%) and manganese (0.20 - 0.60%) enhance its strength and workability. Phosphorus and sulfur are strictly controlled below 0.030% to prevent brittleness. The addition of copper (0.25 - 0.55%), chromium (0.40 - 0.80%), and nickel (≤ 0.65%) forms a protective patina that shields the tube from atmospheric corrosion.
Mechanical Properties
It has a yield strength ranging from 215 to 235 MPa, providing reliable support for heavy loads. The tensile strength is between 360 and 510 MPa, ensuring resistance to deformation. With an elongation of at least 24%, it can endure significant bending and stretching during installation. Its excellent weldability allows for seamless joining in various construction projects.
Key Characteristics
Corrosion Resistance: Outperforms ordinary steel, with a corrosion rate 2 - 8 times lower. The self - forming patina reduces the need for frequent maintenance and painting, saving on long - term costs.
Weldability: Can be easily welded using common welding techniques, enabling quick and efficient assembly in construction sites.
Long - Life: Built to last, it can withstand harsh weather conditions, including high humidity, salt spray, and industrial pollution.
Versatility: Suitable for a wide range of shapes and sizes, meeting diverse project requirements.
Applications
Construction: Ideal for building frames, bridges, and high - rise structures in coastal or polluted areas.
Transportation: Used in railway carriages, shipping containers, and automotive parts.
Industrial Equipment: Employed in the manufacturing of storage tanks, conveyor systems, and mining machinery.
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