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Q355NH weathering steel plate

Q355NH weathering steel plate is a low-alloy high-strength weathering steel that improves the atmospheric corrosion resistance of steel by adding a small amount of alloying elements such as copper (Cu), phosphorus (P), chromium (Cr) and nickel (Ni). The grade of this steel is composed of the first letters of the Chinese pinyin for "yield strength", "weathering resistance" "Q", "NH" and the lower limit of yield strength and quality grade. For example, the "355" in "Q355NHD" means that its lower limit of yield strength is 355 MPa.

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Weathering steel plate

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Product Details

Implementation standard: GB/T 4171-2008
Mechanical properties: yield strength ≥355MPa, tensile strength 490-630MPa, elongation ≥21%.
Performance characteristics: good atmospheric corrosion resistance: by adding copper (Cu), phosphorus (P), chromium (Cr), nickel (Ni) and other elements, it can form a dense oxide film in the atmospheric environment, effectively preventing the further development of corrosion, and the corrosion resistance is 2-8 times or even higher than that of ordinary steel plates.
Excellent comprehensive mechanical properties: it has the characteristics of high-quality steel such as toughness, plasticity, forming, welding, abrasion, high temperature, and fatigue resistance.
Economic and environmentally friendly: the total amount of alloy elements accounts for only a few percent, and the price is relatively low; at the same time, it can be used in thinning, exposed or simplified coating, which can make the components anti-corrosion and prolong life, reduce thinning and reduce consumption, and save labor and energy.
Product application: widely used in steel structures such as railways, vehicles, bridges, towers, etc. that are exposed to the atmosphere for a long time. It is often used to manufacture containers, oil derricks, port buildings, oil production platforms and containers containing hydrogen sulfide corrosive media in chemical and petroleum equipment and other structural parts.

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Weathering steel plate