Faqs

Angle steel, channel steel, I-beam, flat steel common materials are common carbon structural steel (such as Q235) and low alloy high-strength structural steel (such as Q345). Q235 steel has good plasticity, toughness and welding performance, its yield strength is generally in the 235MPa or so, is widely used in the general building structure, machinery manufacturing and other fields. Q345 steel is a kind of low alloy steel, in maintaining good plasticity, toughness and welding performance on the basis of the strength than Q235 steel is higher than the yield strength can reach 345MPa or so, commonly used in structures requiring high load capacity, such as large bridges, heavy machinery and so on, Q345 steel is a kind of low alloy steel, on the basis of maintaining good plasticity, toughness and welding performance, the strength is higher than Q235 steel, the yield strength can reach 345MPa or so, commonly used in the structure of the higher requirements of the load-bearing capacity, such as large bridges, heavy machinery and so on.

First of all, you can check the quality certification documents of the profile, the profiles produced by regular manufacturers have detailed material description. From the appearance, the surface of high-quality profiles should be flat and smooth, without obvious cracks, folding, scarring and other defects. For material composition, it can be detected by spectral analysis and other methods, but this generally requires specialized equipment. For example, Q235 material angle steel may affect its performance if there is serious rust on the surface, and if there are too many inclusions, it will also reduce its quality.

There are equal and unequal angles. Equal angles are expressed as side width × side width × thickness, e.g. ∠40×40×4, which means that the side width is 40mm and the thickness is 4mm. Unequal angle to long side width × short side width × thickness to indicate, such as ∠63 × 40 × 5, is the long side width of 63mm, short side width of 40mm, thickness of 5mm unequal angle.

The dimensions of a channel are determined by the height (h), the leg width (b) and the waist thickness (d). For example, a [10# channel has a height h = 100 mm, a leg width b of about 48 mm, and a waist thickness d of about 5.3 mm. These dimensions determine the load carrying capacity and the range of application of the channel, which is used to carry the loads of beams, columns, etc., in building structures.

The specification of an I-beam is also determined by the height, leg width and waist thickness. In general, the greater the height, the greater the bending resistance. For example, I20a and I20b I-beams have the same height of 200mm, but the leg width and waist thickness of I20b is slightly larger than that of I20a, so the load carrying capacity of I20b is stronger. When choosing I-beams, it is necessary to determine the appropriate specifications according to the actual need for load-bearing capacity to ensure structural safety.

Flat steel is mainly characterized by its width and thickness, e.g. - 40×5, which indicates a flat steel with a width of 40mm and a thickness of 5mm.Its length is generally based on user requirements or common market specifications.Flat steel is widely used in the production of hoop iron, tools and machine parts, etc. Its size determines its use scenario, wider and thicker flat steel can be used to withstand greater pressure.

Angle steel is widely used in the construction field and is commonly used to make frame structures, such as transmission pylons. Because of its L-shaped structure, it can be easily formed into various triangular frames, which are mechanically stable. In mechanical manufacturing, angles can also be used as supports or frames for equipment, for example, the frames of some small machine tools can be made from angles, which can provide enough rigidity to support the weight of the equipment and the forces generated during work.

Channel steel is mainly used in beam and column structures in buildings. In beam structures, it is able to withstand large bending moments, such as crane beams in industrial plants, as cranes generate large dynamic loads when working, and the shape and structure of the channel allows it to effectively resist these loads. In column structures, channels can be used as free-standing columns or combined with other steel sections to form lattice columns to support the weight and horizontal loads of the building.

I-beam is a typical bending-resistant steel section commonly used as a beam in large buildings. For example, in bridge construction, I-beams as main beams can withstand the huge bending moments generated by loads such as vehicles on the bridge. In the support of heavy equipment, I-beam can also play its advantages of strong bearing capacity, such as the support arm part of large cranes, using the high strength of I-beam to ensure the stability and safety of the equipment.