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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..
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.
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 1000px.
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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