H-shaped steel is an economical cross-section and high-efficiency profile with more optimized cross-sectional area distribution and more reasonable strength-to-weight ratio. It is named because its cross-section is the same as the English letter "H". Since all parts of H-shaped steel are arranged at right angles, H-shaped steel has the advantages of strong bending resistance in all directions, simple construction, cost saving and light structural weight, and has been widely used.

Angle steel can be composed of various stress components according to different needs of the structure, and can also be used as a connector between components. Widely used in various building structures and engineering structures, such as beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks, cable trench supports, power piping, busbar support installation, and warehouses shelves etc.
Types of angle steel: mainly divided into two types: equilateral angle steel and unequal side angle steel, among which unequal side angle steel can be divided into two types: unequal sides and equal thickness and unequal sides and unequal thickness.

Channel steel is a long strip of steel with a groove-shaped cross-section. It is a carbon structural steel used in construction and machinery. It is a profile steel with a complex cross-section and has a groove-shaped cross-section. Channel steel is mainly used in building structures, curtain wall engineering, mechanical equipment and vehicle manufacturing, etc.

I-beams are mainly divided into ordinary I-beams, light I-beams and wide-flange I-beams. According to the height ratio of flange to web, it is divided into wide, medium and narrow wide flange I-beams. The first two are produced in sizes 10-60, that is, the corresponding heights are 10 cm-60 cm. At the same height, lightweight I-beams have narrow flanges, thin webs, and light weight. Wide-flange I-beam is also called H-beam. The cross-section feature is that the legs are parallel and there is no slope on the inside of the legs. It is an economical section steel and is rolled on a four-roll universal rolling mill, so it is also called "universal I-beam". Ordinary I-beams and light I-beams have formed national standards.

Flat steel refers to steel with a width of 12-300mm, a thickness of 3-60mm, a rectangular cross-section, and slightly blunt edges. Flat steel can be finished steel or used as raw material for welded pipes and thin slabs for laminated rolling. Main use: Flat steel can be used as a finished material for making hoop iron, tools, and mechanical parts. It is also used as a structural component for building frames and escalators.