JIS G3444 STK Structural Steel Tube, as the STK series structural steel tube conforming to the JIS G3444 standard, is widely used in structural fields such as industrial frame construction and equipment support due to the structural stability of STK material and the strict requirements of standard specifications. Moreover, it can flexibly adapt to various types of steel pipes according to different working conditions, and bring out multiple values. In terms of the nature of the material, it belongs to the category of Carbon Steel Pipe. Made from high-quality carbon steel, the STK series precisely controls the proportion of carbon content and elements such as manganese and silicon, featuring excellent yield strength and elongation, outstanding welding performance, and strong processability. It can meet the load-bearing requirements of industrial structure foundations, such as factory steel structure columns and mechanical equipment supports. In basic industrial construction, it provide…