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Characteristics of GB/T1591 Q345B steel plate

Chemical composition: The chemical composition of Q345B steel plate mainly includes carbon, silicon, manganese, phosphorus, sulfur and other elements. The content and proportion of these elements have an important impact on the mechanical properties, welding performance, corrosion resistance, etc. of the steel plate. Among them, carbon is one of the important elements that affects the strength and toughness of steel plates. Silicon and manganese can effectively improve the strength and hardness of steel plates, while phosphorus and sulfur have a negative impact on the plasticity and toughness of steel plates.

Mechanical properties: The mechanical properties of Q345B steel plate are very excellent, with its tensile strength generally between 400-500 MPa and yield strength around 345 MPa. This high strength and good toughness enable the Q345B steel plate to exhibit good stability and durability when subjected to various complex stresses. In addition, Q345B steel plate also has good low-temperature toughness and can be used in low-temperature environments, which makes it widely used in structural parts used in cold areas.

Low temperature toughness: Q345B steel plate has good toughness in low temperature environments, which is very important for structural parts used in cold areas. This low-temperature toughness can ensure that structural parts will not undergo brittle fracture at low temperatures, thus improving the safety of the structure.

Corrosion resistance: Q345B steel plate has good corrosion resistance and can be used in various corrosive environments. This corrosion resistance ensures that structural parts will not be affected by corrosion during use, thereby extending the service life of the structure.