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Angle steel of steel structure material

May,Mon,2023

What is Angle Steel

Angle steel, commonly known as angle iron, is a long strip of steel with two sides perpendicular to each other in an angle shape. There are equal-sided angles and unequal-sided angles. The two side widths of equilateral angle are equal, and its specification is expressed in mm of side width x side width x side thickness. Such as "L30×30×3", that is, the side width of 30 mm, the side thickness of 3 mm equal-sided angle. Can also be used to indicate the model number, the model number is the number of centimeters of the side width, such as L3#.

Dimensional drawings of angle steel

Angle steel can be composed of different kinds of force members according to different needs of the structure, and can also be used as the connection between the members. It is widely used in various building structures and engineering structures, such as house beams, bridges, power transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouses.

Introduction of Angle Steel

Angle steel can be composed of different kinds of force members according to the different needs of the structure, and can also be used as the connection between the members. Widely used in various building structures and engineering structures, such as house beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks, cable trench brackets, power piping, bus-bar bracket installation, and warehouse shelves, etc..


Angle steel is a carbon structural steel for construction, is a simple section of section steel, mainly used for metal components and plant framework, etc.. In use requires good weld-ability, plastic deformation properties and a certain mechanical strength. The raw material billet for the production of angle steel is low carbon square steel billet, and the finished angle steel is delivered in hot rolled, normalized or hot rolled condition.

Types of Angle Steel Specifications

It is mainly divided into two categories: equal-sided angle and unequal-sided angle, of which unequal-sided angle can be further divided into unequal-sided equal-thickness and unequal-sided unequal-thickness.

Types of angle steel is expressed by the size of side length and side thickness. At present, the domestic angle steel specifications for 2-20, the number of centimeters for the number of side length, the same number of angles often have 2-7 different side thickness. Imported angles are marked with the actual size of both sides and the side thickness and indicate the relevant standards. Generally, the side length of 12.5cm or more is large angle, between 12.5cm-5cm is medium angle, and the side length of 5cm or less is small angle.


The order of import and export angle steel is generally based on the specifications required in use, and its steel number is the corresponding carbon knotted steel number. Also the angle steel has no specific composition and performance series in addition to the specification number.

Types of angle steel

Unequal angles are widely used in various metal structures, bridges, machinery manufacturing and shipbuilding industries, various building structures and engineering structures, such as house beams, bridges, power transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouses, etc..


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