Angle type specification
Angle type specification is mainly divided into two categories of equal side angle and unequal angle, which unequal angle can be divided into unequal equal thickness and unequal unequal thick two kinds.
Angle specifications with side length and side thickness of the size of the representation. At present, the domestic angle specifications for 2-20, to the side length of the number of centimeters for the number, the same number of angles often have 2-7 kinds of different side thickness. Imported angle steel marked with the actual size of both sides and side thickness and indicate the relevant standards. Generally the side length of 12.5cm or more for large angles, 12.5cm-5cm between the medium-sized angle, side length of 5cm or less for small angles.
The ordering of import and export angle steel is generally based on the specifications required in use, and its steel number is the corresponding carbon steel steel number. Also angle steel in addition to the specification number, there is no specific composition and performance series. The delivery length of angle steel is divided into two kinds of fixed length and double length, and the fixed length selection range of domestic angle steel has four ranges of 3-9m, 4-12m, 4-19m and 6-19m according to the specification number. The length selection range of Japanese-made angles is 6-15m.
The section height of unequal angle is calculated according to the width of the long side of the unequal angle. It refers to the steel whose section is angular and whose two sides are not equal in length. It is one kind of angle steel. Its side length from 25mm×16mm-200mm×125mm. rolled by hot rolling mill. The general specification of unequal angle is: ∟50*32--∟200*125 thickness is 4-18mm.
Unequal angles are widely used in various metal structures, bridges, machinery manufacturing and shipbuilding, various building structures and engineering structures, such as beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks, and warehouses, etc.
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