钢管与圆钢等实心钢材相比，在抗弯抗扭强度相同时，重量一般较轻，是一种经济截面钢材，广泛用于制造结构件和机械零件，如石油钻杆、汽车传动轴、自行车架以及建筑施工中用的钢脚手架等。用钢管制造环形零件，可提高材料利用率，简化制造工序，节约材料和加工工时，如滚动轴承套圈、千斤顶套等。2013年已用钢管来制造。钢管还是各种常规武器不可缺少的材料，枪管、炮筒等都要钢管来制造。钢管按横截面积形状的不同可分为圆管和异型管。由于在周长相等的条件下，用圆形管可以输送更多的流体。圆环截面在承受内部或外部径向压力时，受力较均匀，绝大多数钢管是圆管。Compared with solid steel such as round steel, steel pipe is generally lighter in bending and torsion strength. It is an economic section steel, widely used in manufacturing structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffold used in construction. Using steel tube to make ring parts can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing time, such as rolling bearing rings, Jack sets, etc. Steel pipes have been used for manufacturing in 2013. Steel pipe is also an indispensable material for all kinds of conventional weapons. Steel pipe is used to manufacture barrel and barrel. According to the different cross-sectional shapes, steel pipes can be divided into circular pipes and special-shaped pipes. Because in the condition of equal circumference, more fluid can be transported by circular tube. When the ring section bears the internal or external radial pressure, the force is relatively uniform, and most of the steel pipes are round pipes.