Q345B large diameter seamless steel pipe

Q345B large-diameter seamless steel pipe is a long steel material with a hollow cross-section and no joints that is processed by rolling or cold drawing with seamless steel pipe as the base material. Compared with solid steel such as round steel, Q345B large-diameter seamless steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical section steel. Q345B steel pipe is widely used in the manufacture of structural parts and mechanical parts.

Q345B large-diameter seamless steel pipe can be divided into Q345B square pipe and Q345B special-shaped pipe according to the shape of the cross-sectional area. When the ring section bears internal or external radial pressure, the force is relatively uniform. Therefore, most Q345B steel pipes are round pipes. However, round pipes also have certain limitations. For example, under the condition of plane bending, Q345B round tubes are not as strong as Q345B seamless square tubes and rectangular tubes. Square and rectangular tubes are commonly used in some agricultural machinery skeletons, steel and wood furniture, etc. According to different purposes, special-shaped steel pipes with other cross-sectional shapes are also required.