The grade of GB/T 4171Q265GNH weather resistant steel consists of the first letter Q in Chinese pinyin of "yield strength", "high weather resistance" or "weather resistance",GNH or NH, the lower limit of yield strength and the quality grade (A/B/C/D/E)
GB/T 4171Q265GNH weather resistant steel application: it is suitable for vehicles, Bridges, containers, buildings, towers and other structures with atmospheric corrosion resistance of hot and cold rolled steel plates, strips and sections.
GB/T 4171Q265GNH weather resistant steel advantages: by adding a small amount of alloy elements such as Cu, P, Cr, Ni, etc., it can form a protective layer on the surface of the metal body to improve the atmospheric corrosion resistance of steel. High-weathering steel has better atmospheric corrosion resistance. GB/T 4171Q265GNH plate chemical composition and mechanical property
Q265GNH weather resistant steel surface quality: 1. There shall be no cracks, scarring, folding, bubbles, inclusions, layering or other defects on the surface of the steel which are harmful to the use of the steel. Such defects shall be allowed to be removed to a depth not exceeding half of the tolerance of the thickness of the steel. Clear place should be smooth without edges and corners, shape steel surface defects shall not be removed horizontally 2. The surface of hot rolled steel is allowed to have other defects that do not affect the use, but the minimum thickness of the steel shall be guaranteed 3. The surface of cold-rolled steel plates and strips is allowed to be slightly scratched, oxidized color, pale yellow film after pickling, folded, local pitting, scratches and indentations with a depth or height not greater than half the tolerance. 4. The steel belt is allowed to be delivered with defects, but the defective part shall not exceed 8% of the total length of the steel belt
The above information is from GB/T 4171Q265GNH weather resistant steel China supplier--Bebon. If you want to know more about Q265GNH plate or other steel, please feel free to contact us.