Types of angle steel
Angle steel is a carbon structural steel for construction, which is a section steel with a simple section, mainly used for metal components and the frame of a workshop. In use, it is required to have good weldability, plastic deformation performance and certain mechanical strength. The raw material billet for producing angle steel is low carbon square billet, and the finished angle steel is delivered in hot-rolled, normalized or hot-rolled state.
Specifications and types of angle steel:
It is mainly divided into two types: equal-sided angle steel and unequal-sided angle steel. Among them, the unequal-sided angle steel can be divided into two types: unequal-sided and equal-thickness and unequal-sided and unequal-thickness.
The specification of angle steel is expressed by the dimensions of side length and side thickness. At present, the domestic angle steel specifications are 2-20, and the number of centimeters of the side length is the number. The same angle steel often has 2-7 different side thicknesses. Imported angle steel indicates the actual size and thickness of both sides and the relevant standards. Generally, the large angle steel with a side length of 12.5cm or more is a large angle steel, a medium angle steel with a side length of 12.5cm-5cm, and a small angle steel with a side length of less than 5cm.
The order of import and export angle steel is generally based on the specifications required in use, and its steel grade is the corresponding carbon steel grade. That is to say, in addition to the specification number, the angle steel has no specific composition and performance series.
The delivery length of angle steel is divided into fixed length and double length. The selection range of fixed length of domestic angle steel is 3-9m, 4-12m, 4-19m and 6-19m according to the different specifications. The length of angle steel produced in Japan ranges from 6 to 15m.
Appearance quality requirements of angle steel: The surface quality of angle steel is specified in the standard, and it is generally required that there should be no harmful defects in use, such as delamination, scarring, cracks, etc. The allowable range of angle steel geometric deviation is also specified in the standard, which generally includes items such as curvature, side width, side thickness, top angle, theoretical weight, etc., and it is stipulated that the angle steel must not have significant twist.