Angle groove steel knowledge

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(Metallurgy, Chemical, Energy) Gongjiao slot application knowledge printing reference release time: 2013-01-16




The main purpose angle slot of the working angle slot is mainly used for building structure, vehicle manufacturing and other industrial structures. The channel steel is also often used in conjunction with the I-beam.

The main producing areas of Gongjiao slot are mainly produced by Baosteel, Laiwu Steel, Wuhan Iron and Steel, Maanshan Iron and Steel and other steel mills.

I-beam steel is also called steel beam, and is a long strip of steel with a cross-section of I-shaped. The specifications are expressed in millimeters of waist height (h) * leg width (b) * waist thickness (d), such as "work 160 * 88 * 6", which means that the waist height is 160 mm, the leg width is 88 mm, and the waist thickness is 6 mm I-beam. The specifications of the I-beam can also be expressed by the model number, which indicates the number of centimeters of the waist height, such as Gong 16#. For the I-beam with the same waist height, if there are several different leg widths and waist thicknesses, add abc to the right of the model to distinguish it, such as 32a# 32b# 32c#. I-beam is divided into ordinary I-beam and light I-beam, and the specification of hot-rolled ordinary I-beam is 10-63#. The hot-rolled ordinary I-beams supplied by the supplier and the buyer are 12-55#. I-beam is widely used in various building structures, bridges, vehicles, brackets, machinery, etc.
The difference between the I-beams of the HW hm hn h-shaped steel is that the wear surface is thicker than the web and the outer part is thin; the flange of the h-shaped steel is the same.
Hw hm hn h is the general name for h-shaped steel, h-shaped steel is welded; hw hm hn is hot rolling
Hw is the height of the h-shaped steel and the flange width are basically equal; mainly used for the steel core column in the reinforced concrete frame structure column, also called the rigid steel column; mainly used for the column in the steel structure
Hm is the ratio of h-shaped steel height and flange width is about 1.33~~1.75 mainly in steel structure: used as steel frame column in frame structure with dynamic load; used as equipment platform
Hn is the h-shaped steel height and flange width ratio is greater than or equal to 2; mainly used for beams;
The use of I-beam is equivalent to hn steel;
1. For I-shaped steel, whether it is ordinary or light, the cross-sectional dimensions are relatively high and narrow, so the difference between the two main sleeves has a large difference in the moment of inertia. Therefore, it can only be used directly on the web. A member that is bent in a plane or is formed into a lattice-type force member. It is not suitable for the axial compression member or the member that is curved perpendicular to the plane of the web, which makes it have a large limitation in the application range.
2, h-shaped steel is a highly efficient economical profile (others are cold-formed thin-walled steel, profiled steel, etc.), due to the reasonable cross-sectional shape, they can make steel more efficient and improve the ability to undertake. Unlike the common I-shaped type, the flange of the h-shaped steel is widened, and the inner and outer surfaces are generally parallel, which facilitates the connection with the high-strength screw and other members. Its size constitutes a reasonable series, the model is complete, easy to design and use.
3. The flanges of the h-shaped steel are of equal thickness, with a rolling section, and a combined section composed of three plates welded. I-beams are all rolled sections, and due to poor production processes, there is a 1:10 slope inside the flange. H-beam rolling is different from ordinary I-beams. Only one set of horizontal rolls is used. Since the flanges are wide and have no slope (or a small slope), a set of vertical rolls must be added and rolled simultaneously. Its rolling process and equipment are more complex than ordinary rolling mills. The maximum rolled h-shaped steel that can be produced in China is 800mm in height, which can only exceed the welded composite section.
China's hot-rolled h-beam national standard (gb/t11263-1998) divides h-shaped steel into three types: narrow flange, wide flange and steel pile, and their codes are hz, hk and hu. Narrow flange h-beams are suitable for beam or compression-bending components, while wide-flange h-beams and h-beams are suitable for axial compression members or compression members. Compared with h-shaped steel, I-beam is not as good as h-shaped steel under the premise of equal weight, w, ix and iy.

Angle Steel Overview Angle steel, commonly known as angle iron, is a long strip of steel that is perpendicular to each other on both sides. There are equal angle steel and unequal angle steel. The sides of the equiangular steel are equal in width. The specifications are expressed in millimeters of side width × side width × side thickness. For example, “∠30×30×3” means an equilateral angle steel with a side width of 30 mm and a side thickness of 3 mm. It can also be expressed by model number, the model number is the number of centimeters of the side width, such as ∠3#. The model does not indicate the size of the different side thicknesses in the same model. Therefore, the side width and thickness of the angle steel are filled in the contract and other documents, so as to avoid the model number. The specification of hot rolled equal angle steel is 2#-20#.
The angle steel can be composed of various force-receiving members according to the different needs of the structure, and can also be used as a connecting member between the members. Widely used in a variety of building structures and engineering structures, such as beams, bridges, transmission towers, lifting and transport machinery, ships, industrial furnaces, reaction towers, container racks and warehouse shelves.
Angle steel is a carbon structural steel for construction. It is a steel section of simple section, mainly used for the frame of metal components and workshops. Good weldability, plastic deformation properties and certain mechanical strength are required in use. The raw material billet for producing angle steel is a low carbon square billet, and the finished angle steel is delivered in hot rolling, normalizing or hot rolling.
Import and export situation China's import and export angle steel has a certain amount of bulk, mainly imported from Japan and Western Europe. The export areas are mainly Hong Kong, Macao, Southeast Asia, Latin America and Arab countries. Export production enterprises are mainly steel plants (rolling mills) in Liaoning, Hebei, Beijing, Shanghai, Tianjin and other provinces and cities.
Most of the imported angle steels are large and small angle steels and special shape angle steels. Most of the export varieties are medium angle steels such as No.6 and No.7.

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