There are many types of steel, which can generally be divided into four categories: section steel, plate, tube and wire.
1. Section steel
There are many types of section steel, which is a solid long steel with a certain cross-sectional shape and size. According to its different cross-sectional shapes, it can be divided into simple and complex cross-sections. The former includes round steel, square steel, flat steel, hexagonal steel and angle steel; the latter includes rail, I-beam, channel steel, window frame steel and special-shaped steel. Small round steel with a diameter of 6.5 -9.0mm is called wire.
2. Steel plate
It is a flat steel with a large aspect ratio and large surface area. According to the thickness, there are three types of thin plates (thickness<4mm ), medium plates (thickness 4 -25mm) and thick plates (thickness> 25mm ). Steel strips are included in the steel plate category.
3. Steel pipes
The steel pipe is a long steel with a hollow section. According to its different cross-sectional shapes, it can be divided into round pipes, square pipes, hexagonal pipes and various special-shaped cross-section steel pipes. According to different processing technology, it can be divided into two categories: seamless steel pipe and welded steel pipe.
4. Steel wire
Steel wire is another cold processed product of wire rod. According to different shapes, it can be divided into round steel wire, flat steel wire and triangular steel wire. In addition to direct use, steel wire is also used to produce steel wire ropes, steel threads and other products.