I-beam is an economical section steel with better mechanical properties, and its characteristics are as follows:
Wide flange and high lateral stiffness. Strong bending resistance.
The two surfaces of the flange are parallel to each other, making it easy to connect, process, and install.

In the field of architecture, H-shaped steel is widely used in the manufacturing of various steel structural beams, columns, purlins, and beams, especially in large industrial factories and high-rise buildings. Due to its strong stability, seismic resistance, and light weight, H-shaped steel has become the mainstream structure in the current construction field

Flat steel can be finished steel, as well as used as blanks for welded pipes and thin slabs for laminated sheets. Main use: Flat steel, as a finished product, can be used for making hoop iron, tools, and mechanical parts. It is also used as a structural component for building frames and escalators in construction. Flat steel is divided into two types according to its shape: flat spring flat steel and single sided double groove spring flat steel.
Hot rolled spring flat steel is mainly used to manufacture leaf spring for vehicles, tractors, railway transportation and other machinery.

The general specifications are 1*2, 1*3, 1*7 and 1*19, etc., and the diameter of the single wire is usually added at the back, which is expressed as "1*19φ5", indicating that a steel strand consists of 19 strands with a diameter of 5mm stranded wire.

Manufacturing process of thick wall steel pipe and seamless steel pipe:
Hot rolled (extruded seamless steel tube) round tube blank → heating → perforation → three roll cross rolling, continuous rolling or extrusion → pipe stripping → sizing (or reducing) cooling → straightening → hydrostatic test (or flaw detection) mark → warehousing.