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What are the classifications of section steel?

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What are the classifications of section steel?

Section steel is one of the four major types of steel (plate, tube, profile, wire).


According to the cross-section shape, section steel is divided into simple section section steel and complex section section steel (special-shaped steel). The former refers to square steel, round steel, flat steel, angle steel, hexagonal steel, etc.; the latter refers to I-beam, channel steel, window frame steel, curved steel, etc.


Square steel: Steel with square section, hot-rolled and cold-rolled; hot-rolled square steel has a side length of 5-250mm; cold-drawn square steel has a side length of 3-100mm.


Round steel: round section steel, divided into three types: hot-rolled, forged and cold-drawn. The diameter of hot-rolled round steel is 5-250mm, of which 5-9mm is commonly used as the raw material for drawn steel wire, called wire rod; because it is supplied in coils Also called hot rolled wire rod. Forged round steel has a thicker diameter and is used as a shaft blank. The diameter of cold drawn round steel is 3-100 mm, and the dimensional accuracy is high.


Flat steel: a steel with a width of 12-300mm, a thickness of 4-60mm, a rectangular cross-section and slightly pure edges. Flat steel can be a finished steel product, or it can be used as a billet for welded pipes and thin slabs for stacked sheets.


Angle Steel: There are two types of equal angle steel and unequal angle steel. The specifications of angle steel are expressed by the dimensions of side length and side thickness. The angle steel usually produced is No. 2-20, that is, the number of centimeters of the side length. For example, No. 5 equilateral angle steel refers to an angle steel with a side length of 125px (50mm). The same horn steel often has 2-7 different side thicknesses.


I-beam, also known as steel beam (English name I Beam), is a long steel with an I-shaped cross section. There are three types of I-beams: ordinary I-beams, light I-beams, and H-beams. I-beams are widely used in various building structures, bridges, vehicles, supports, machinery, etc.


Channel steel is a long strip of steel with a groove-shaped cross section. Channel steel is a carbon structural steel for construction and machinery. It is a section steel with a complex cross-section, and its cross-sectional shape is channel-shaped. Channel steel is mainly used in building structure, curtain wall engineering, mechanical equipment and vehicle manufacturing.


Window frame steel, take the blank steel with a square section, and hot-roll it on the rolling mill to form an H-shaped section steel. At the exit of the last pass of the rolling mill, a pinch and grooving device is installed to remove the H-shaped section steel from Longitudinal grooves are cut on both sides of the core. After cooling, the grooves are cut into two T-shaped steel sections.


Bent steel is formed by bending steel plate or strip steel, which can be divided into hot-bending steel and cold-bending steel. There are more than two thousand varieties and specifications of curved steel. The bending forming method for curved section steel can produce complex section section steel, thin-wall section steel and hollow section steel that cannot be produced by hot rolling method. Replacing ordinary hot-rolled steel with curved steel can reduce structural weight, reduce manufacturing workload and save a lot of metal. Bent steel is widely used in manufacturing sectors such as automobiles, vehicles, shipbuilding, agricultural tools, furniture, aviation, and bicycles.

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