Carbon steel material Q355 is a low-alloy high-strength structural steel in the Chinese standard (GB/T 1591-2018), which is widely used in buildings, bridges and other structural engineering.
Q355 belongs to low-alloy high-strength structural steel. According to Chinese standards, it is a typical low-alloy steel suitable for structures that bear higher loads. Chemical composition: It mainly contains elements such as carbon (C), manganese (Mn), silicon (Si), and contains a certain amount of alloying elements such as chromium (Cr) and nickel (Ni) to improve the performance of steel. Mechanical properties: The yield strength of Q355 steel is usually around 355 MPa (at a thickness of 16 mm), and the tensile strength is between 470-630 MPa.
There are different grades of Q355 steel, usually including:
Q355B: Common grade, mainly used for general structural parts.
Q355C: Higher toughness requirements, suitable for structures that bear impact loads.
Q355D: Has better low-temperature performance, suitable for structures in cold areas.
Q355E: Has higher low-temperature toughness, suitable for structures in extremely cold environments.
Advantages of Q355
High strength: Q355 steel has high yield strength and tensile strength, which makes it excellent when carrying heavy loads.
Good welding performance: Q355 steel shows good welding performance during welding and is suitable for use in welded structures.
Good toughness: Especially Q355C, Q355D and Q355E grades, which have good low-temperature toughness and can adapt to harsh environments.
Good processing performance: Q355 steel can be processed by heat treatment, cold processing and other processing to meet different engineering needs.
Uses of Q355
Construction engineering: used for load-bearing structures such as high-rise buildings, bridges, and factories.
Mechanical engineering: used to manufacture various mechanical structural parts, such as brackets, frames, etc.
Transportation: used in the construction of transportation facilities such as bridges and railway stations.
Water conservancy projects: used in water conservancy project structures such as dams and pipelines.
Q355 steel has become a very important structural material in modern engineering construction due to its high strength, good weldability and toughness.
