Hot-rolled steel channel

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Channel is the section groove strip steel. Channel steel is used in the construction and machinery for carbon structural steel, steel steel section is complex, its sectional shapegroove. Channel steel is mainly used for building structure, the curtain wall engineering,mechanical equipment and vehicle manufacturing etc.. Request it has better welding, rivetingperformance and comprehensive mechanical properties in use. Steel billet production raw materials are carbon content not exceeding 0.25% of the carbon steel or low alloy steel billet.Product channel steel after hot forming, normalizing or hot-rolled state of delivery. Thespecifications to waist high (H) * leg width (b) * waist thick (d) millimeter number representation, such as 100*48*5.3, said waist height 100 mm, width of 48 mm steel legs,waist thickness was 5.3 mm, or 10# channel. Waist high the same channel, if there are several different wide legs and waist thickness also need to add a B C to be the difference in the types of the right, such as 25#a 25#b 25#c etc..

Classification

Channel can be divided into ordinary steel and light channel. Hot rolled ordinary channelspecifications for 5-40#. By both sides of supply and demand supply of hot rolled flexiblechannel protocol specifications for 6.5-30#. Channel steel is mainly used for building structure, vehicle manufacturing, other industrial structure and a fixed disk cabinet, steeloften used together with choices.

Channel steel according to shape and can be divided into 4 kinds: Leng Wan equilateral channels, Leng Wan scalene channel, Leng Wan edge channel, Leng Wan channel section with outer edge

In accordance with the steel structure theory, should be the channel steel flange force, that is to say the channel should be upright, not lying.

No.

With international chemical symbols for the element and its symbols to represent the chemical composition, in Arabia letter to indicate the contents of components:

Such as: China, Russia 12CrNi3A

Using a fixed number of bits to represent the steel series digital or digital; such as: the United States, Japan, 300 series, 400 series, 200 series;

Using the Latin alphabet and their sequence number, only that the use of.

The specification set

Channel steel specifications mainly used high (H), Tui Kuan (b), waist thickness (d) and othersize

Channel steel (3)

Said that at present domestic steel specifications from 5 to 40, that is, the correspondingheight of 5 to 40cm.

At the same height, light channel than common channel steel legs, waist narrow thin, light weight. 18 - 40, 5 - 16 for large channel, channel steel for medium channel. The importchannel indicate the actual size and related standards. Steel import and export orders generally is in determining the corresponding (carbon steel or low alloy steel) steel after,required the use specifications in the main. In addition to specifications, outside the channelwithout specific composition and performance series.

The delivery channel length is divided into fixed length, double length two, and the provisions of tolerance in the corresponding standard. The domestic channel length selection scope according to the specifications of different divided into 5 12M, 5 19m, 6 19m three. The importchannel length selection is generally in the range 6 to 15m.

China's steel imports more than it exports. Simple import and along with the complete engineering importing two channels. In recent years, China's coastal big port (Dalian, Tianjin,Qinhuangdao, Lianyungang etc.) in the new, expansion of oil, coal, grain and other bulkimport and export commodity automatic loading and unloading in the project, with the mainequipment is introduced at the same time, imports large channel is on the increase. The main production countries and regions as Japan, Russia, Western europe. Export channel mainly to Hong Kong and macao.

7 the appearance requirements

Surface quality and geometry of the channel of the allowable deviation are specified in the standard. General requirement of surface shall not use harmful defects, there shall be nosignificant reverse, provisions of channel wave bending (camber) related to allow surface shape value and various specifications channel parameters (h, B, D, t etc.) numerical,tolerance. The main performance of channel geometry is not true: angle, leg extended legand etc..

8 the main origin

Channel of China is mainly composed of several steel production, steel, iron, Tang Gang,Huang te, Maanshan Iron and steel, Bao Steel, Xuanhua Steel, Japan etc..




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Q:The following steel is not section bar, is it? A. thread steel, B. steel pipe, C. track, D. channel steel
The thread steel belongs to the small section steel, the track and the channel steel belong to the large section steel.According to the shape of the cross-section, the steel is generally divided into profiles, plates, pipes and metal products in four categories.Therefore, the steel pipe belongs to the pipe, not the profile.
Q:Standard for channel 20
According to the GB / T 707 - 1998 hot-rolled steel GB, No. 20 channel is divided into: 20A; 20b two.20A: height: 200 mm width: 73 mm thickness: 7 mm weight: 22.637 kg / m theory.20b: height: 200 mm width: 75 mm thickness: 9 mm weight: 25.777 kg / m theory.(Note: the theoretical weight calculation of steel hot-rolled steel according to the density of 7.85 g / cm3)
Q:What does channel 20# mean?.
Channel steel is a strip of steel with a cross section. Its specifications are X (waist height) (H), leg width (b) X, waist thickness (d) mm number, such as: [200X73X7, indicating waist height of 200 mm, leg width of 73 mm, waist thickness of 7 mm channel, or called 20a# channel. Among them, a means waist high, 200 of the channel has different leg width and waist thickness, so in the right side of the model plus a, B, C to distinguish, such as: 20a#, 20b#, etc..
Q:What does "deformed L/200" mean in the carrying capacity of channel steel?
This refers to deflection, deflection is the force or non-uniform temperature changes, the axis of the rod in the direction perpendicular to the axis of the line displacement, or plate surface in the vertical direction of the middle direction of the line displacement. L/200 is the maximum amount of deformation produced per 200mm length. That is to say, the lowest point after the force is divided by the size of the origin by the ratio of the length L. For example, the length is 3M, the maximum deformation can not exceed 3000/200=15mm, but there is a premise that the force can be deformed, but after the removal of force, it must rebound to the original standard is effective, otherwise it is invalid.
Q:What do channel and angle steel do? Are they used to fix bridge frames? What's the difference between them?
The channel is open type, angle "type, can be seen from the cross section, channel angle stronger than, of course, also a lot more expensive than the channel angle, if you are a fixed 400*100 below the bridge suggest you use the No. 4 angle on the line. If it is suggested that you use the steel suspension vertical wall, if the landing bracket I suggest you use the square.
Q:Six meters long, standard 10 channel steel, theoretical weight
The finished channel steel is delivered by hot forming, normalizing or hot rolling. The specifications are expressed in millimeters of height (H) * leg width (b) * waist thickness (d), such as 100*48*5.3, which means waist height is 100 mm, leg width is 48 mm, waist thickness is 5.3 mm channel, or 10# channel steel. The same height of the channel, if there are several different leg width and waist thickness, also need to add a, B, C on the right side of the model to distinguish, such as 25#a, 25#b, 25#c and so on.
Q:Channel 10 is calculated, if the price per metre is calculated
On the market, the sale of 10 channel steel, a lot less than the national standard weight, the general negative difference in 5% within the standard. Depending on your use requirements, the maximum negative difference may be as high as 30%.
Q:What is the difference between 12# double channel steel and single channel steel?
Channel steel is a strip of steel with a cross section. Its specification means: such as 120*53*5, which means that the waist height is 120 millimeters, the width of the leg is 53 millimeters of channel, the waist is 5 mm thick channel, or called 12# channel steel. The same height of the channel, if there are several different leg width and waist thickness, also need to add a, B, C on the right side of the model to distinguish, such as 25a#, 25b#, 25c# and so on.
Q:What about channel 16?
Waist height of 160mm channel (channel number usually take ten is waist high), 160*63*6.5 and 160*65*8.5 two models, respectively, 160a# and 160b#, the general situation is not specified, with a, B that kind of time, usually 160a#.
Q:What is the weight of the national standard 8# channel steel?
Data from the GB/T 707-1988 dimension, shape, weight and tolerances

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