Seamless steel tubes are long steel bars with a hollow cross-section and no joints along the perimeter. The production process is relatively complex, usually involving piercing solid billets or ingots, followed by hot rolling, cold rolling, or cold drawing, among other processes.
Seamless steel tubes feature a hollow cross-section, which makes them lighter and stronger compared to solid steel. Being processed through methods like piercing and rolling, seamless steel tubes have no seams around their periphery, offering superior sealing and pressure-bearing capabilities. They typically exhibit high dimensional accuracy and surface quality, meeting various high-precision requirements. Seamless steel tubes boast high tensile strength, yield strength, and impact toughness, enabling them to withstand significant pressure and loads.
The production process of seamless steel tubes mainly includes piercing, hot rolling, cold rolling, or cold drawing, among others. Piercing involves the process of converting solid billets or ingots into rough tubes; hot rolling entails heating the rough tubes before rolling to achieve the required dimensions and shapes; cold rolling or cold drawing, on the other hand, refers to further processing the rough tubes at room temperature to enhance their dimensional accuracy and surface quality.
Overall, seamless steel tubes are a superior steel with wide application prospects, thanks to their excellent properties and diverse uses, making them an indispensable material in many industries.