Description and use of Q235B/Q355B rectangular tube
Q235B rectangular tube
Q235B is a common low-carbon steel with good weldability and processability. Its yield strength is 235MPa, which means that it can still maintain good stability and safety when subjected to large external forces. Its chemical composition is mainly carbon (C) ≤ 0.22%, manganese (Mn) ≤ 1.4%, silicon (Si) ≤ 0.35%, etc. In addition, its carbon content is generally between 0.12% and 0.20%, with excellent ductility and plasticity, suitable for use in low-stress and non-cracking environments.
Q355B rectangular tube
Q355B is a high-strength low-alloy steel with a yield strength of up to 355MPa, which is much higher than Q235B. In addition to carbon and manganese, it also contains appropriate amounts of aluminum, nickel, copper and other elements, which make it have good weldability, plasticity and toughness. It not only has high strength, but also has excellent corrosion resistance and fatigue resistance.
Uses
Uses of Q235B rectangular tubes
Construction industry: As one of the main materials for steel structures, it is widely used in the construction of large projects such as high-rise buildings, bridges, and stadiums. Due to its good processing performance and moderate strength, it can meet the load-bearing requirements of general building structures.
Manufacturing industry: In industries such as machinery and equipment, automobile manufacturing, and shipbuilding, it has become an ideal choice for making frames, brackets, pipes and other components. For example, in automobile manufacturing, it can be used to make components such as body frames.
Uses of Q355B rectangular tubes
Heavy machinery field: It is particularly suitable for heavy machinery, such as mining machinery, engineering machinery, etc. It can withstand greater pressure and stress and meet the high strength requirements of heavy equipment for materials.
High-pressure container field: Due to its high strength and good corrosion resistance, it can be used to manufacture high-pressure containers to ensure the safe operation of containers under high-pressure environments.
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The products are widely used in the construction and infrastructure fields, such as bridges, large buildings, highways, tunnels, airports, docks, etc. Steel is an ideal choice for these structures, capable of withstanding heavy weights and strong winds.
