Q355GNHL weathering steel plate

Q355GNHL weathering steel plate is a kind of high weathering resistance low alloy steel. It improves the atmospheric corrosion resistance of steel by adding a small amount of copper (Cu), phosphorus (P), chromium (Cr), nickel (Ni) and other alloy elements to ordinary carbon steel. The grade of this steel is composed of "yield strength", the first letter "Q" of the Chinese pinyin of "high weathering resistance", "GNH", the lower limit of yield strength and quality grade (L). "355" means that its yield strength is 355 MPa, and "L" represents the quality grade.

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Weathering steel plate

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PRODUCT DETAILS

Chemical composition: usually contains carbon (C) ≤ 0.12%, silicon (Si) 0.20%-0.75%, manganese (Mn) ≤ 1.00%, phosphorus (P) 0.07%-0.15%, sulfur (S) ≤ 0.020%, copper (Cu) 0.25-0.55%, chromium (Cr) 0.30-1.25%, nickel (Ni) ≤ 0.65% and other elements. In order to improve the performance of steel, trace alloying elements may also be added, such as niobium (Nb) 0.015%-0.060%, vanadium (V) 0.02%-0.12%, titanium (Ti) 0.02%-0.10%, etc., and aluminum (Alt) ≥ 0.020%. Molybdenum (Mo) ≤ 0.30%, zirconium (Zr) ≤ 0.15% and other alloying elements may also be added.
Mechanical properties: yield strength ≥355MPa, tensile strength 490-630MPa, elongation after fracture ≥22% (when thickness is not more than 16mm). In terms of impact performance, the requirements of V-notch impact test are different according to different quality grades. For example, grade D requires impact absorption energy ≥34J at -20℃.
Performance characteristics: Excellent atmospheric corrosion resistance: Through the reasonable ratio of alloy elements, a stable rust layer is formed on the surface to effectively resist the erosion of the atmospheric environment.
Good comprehensive mechanical properties: It has high strength and certain toughness, which can meet the load-bearing and deformation requirements of related structural parts.
Application areas: Mainly used for steel structures such as railway vehicles, bridges, towers, containers, etc. that are exposed to the atmosphere for a long time, as well as facilities such as oil derricks, seaport buildings, and oil production platforms. It can also be used to manufacture structural parts such as containers containing hydrogen sulfide corrosive media in chemical petroleum equipment.

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The company is mainly engaged in the production and processing of steel pipes, with a complete range of products, including stainless steel pipes, welded pipes, seamless steel pipes, etc. It also produces steel plates, steel coils, steel strips, and profiles. It is one of the large steel manufacturers in China, with large warehouses in multiple cities across the country, abundant supply of goods, superior quality, reliable quality, and honest operation.

FACTORY

FAQ

Q1:Can you send samples?

A:Of course, we can provide customers with free samples and express shipping service to all over of the world.

Q2:What product information do I need to provide?

A:Please kindly provide the grade, width, thickness, surface treatment requirement should you have and quantities you need to purchase.

Q3:It's my first time to import steel products, can you help me with it?

A:Sure,we have agent to arrange the shipment, we will do it together with you.

Q4:What about product prices information?

A:Prices various according to periodic price changes of raw materials.

Q5:What ports of shipment are there?

A:Under normal circumstances, we ship from Shanghai, Tianjin, Qingdao, Ningbo ports, you can specify other ports according to your needs.

Q6:What is your terms of payment ?

A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shipment or based on BL copy or LC at sight.

Weathering steel plate