Main application of carbon structural steel in steel structure
Section steel
According to the processing method of carbon steel steel for hot-rolled steel, cold-formed steel, cold rolled steel; according to the dimensions were divided into large, medium and small; according to the cross section shape is simple section steel, flat steel, round steel (except for Fang Gang and the six angles, including octagonal steel, steel, steel arch triangle elliptical steel, angle steel etc.), complex section (such as steel, steel, steel, steel piles, H steel), in addition to agricultural machinery, automobiles, ships, mines, railways and other industries of special shaped steel, section steel and steel cycle. The steel grade is usually Q235.
Steel is widely used in construction, railways, highways, bridges, energy, mining, automotive, light industry, agriculture, water conservancy, terminals, machinery, petroleum, chemical and other industries.
1, I-beam
Usually the production and use of the I-beam is hot rolled narrow flange, inclined leg ordinary i-beam. The characteristics of the section design is a certain inclination short legs, inner thighs, aspect ratio is small, the waist is thick, the metal distribution is not reasonable. It has been such a I-beam wide edge parallel legs instead of i-beam.
I type 34, size (height * width * thick waist) 100mm*68mm*4.5mm-630mm*180mm*17mm (height 16, width 34). I mainly take the height of the direction of the load, used as a curved beam. Widely used in plant, civil engineering, bridges, vehicles, ships, equipment manufacturing and other structural parts.
2, channel
Usually the production and use of steel is hot rolled narrow flange, inclined leg common channels. The channel model is 30 and the size (height * width * thick waist) 50mm*37mm*4.5mm-400mm*140mm*14.5mm (height * width size 15, size 28). Mainly used for steel purlin, bridge structure, large vehicles, ships and equipment general beam frame.
3, H type steel
The H design is better than ordinary steel I-beam section, increase the width and height of flange and flange, thin waist, side slope without wings, parallel to the edge of the large aspect ratio. Compared with ordinary steel, H steel without increasing, and even reduce the length of each meter weight, greatly improving the section coefficient. H steel can withstand the complex structure of the various aspects of the load, bending, torsion, compression, and good stability, is the steel structure engineering ideal economic section steel.
There are two kinds of production methods of H steel: universal mill hot rolling and welding.
Hot rolled H section steel has wide flange H section steel (HW), H (HM), H (HN) and H steel (HP). Wide flange H section steel has 9 models, 21 kinds of specifications; middle flange H steel has 18 models, the specification of the; narrow flange H steel has 18 models, the following specifications; H steel pile has 6 models, 19 kinds of specifications. Size (height * width * thick waist), wide flange steel H for 100mm*100mm*6mm-498mm*432mm*45mm; in the flange of H steel 148mm*100mm*6mm-594mm*302mm*14mm; narrow flange type H steel 100mm*50mm*5mm-912mm*302mm*18mm; H steel pile 200mm*204mm*12mm-502mm*470mm*20mm.
Welded H section steel has welded H section steel (HA), light welded H section steel (HAQ) and welded H steel pile (HGZ). Welded H steel has 42 models, 129 kinds of specifications; light welded H steel has 28 models; H steel pile has a model of the 6, the size of the 19. Size (height * width * thick waist), welding of H steel 300mm*200mm*6mm-1200mm*600mm*16mm; light welding H steel 100mm*50mm*3.5mm-454mm*300mm*8mm; usually welding H steel pile length for 200mm*200mm*12mm-502mm*470mm*20mm. welding of H steel for 4-12m.
H steel is suitable for the manufacture of steel columns, beams, piles, frames and other components, widely used in industrial and civil buildings, bridges, civil engineering, high-rise buildings, highways, subways, ship machinery and equipment, etc.. H type steel piles are widely used in various construction projects.
4, angle
Angles are all characterized by good mechanical properties in the horizontal and vertical axis. Round section shape of equilateral angle steel, equilateral angle steel, equilateral angle steel with unequal thickness (L steel). The edge of the corner fillet evenly.
Specifications of angle steel is the largest steel in hot rolling. The type of equilateral angle from 20 to 2, there are 20 models, 82 kinds of specifications. Unequal angle models from 2.5/1.6 to 20/12.5, there are 19 models, 65 kinds of specifications. Usually the two angle length according to the type, divided into 4-12m, 4-19m and 6-19m. equilateral angle steel with unequal thickness models from L250*90*9*13 to L500*120*13.5*35, there are 11 models. Its usual length is 6-12m. Large angle steel is widely used in large structure workshop, industrial construction, railway, transportation, bridges, vehicles, ships etc.. The structure of a medium angle for building truss, power communication tower, derrick and other uses. Small angle steel for buildings, furniture, equipment manufacturing, bracket and frame etc..
5, special section steel for automobile
Hot rolled steel rim and the ring type steel is the main raw material for manufacturing truck wheels.
Rim type steel without heat treatment and machining, welding, round off direct expansion process into the rim. Therefore, it is required that the steel should have good extension performance and welding performance. It is easy to appear the phenomenon of crack and crack during the processing of the rim steel produced by Q235 steel. Therefore, on the basis of the Q235 steel, the scope of reducing the content of carbon and manganese, reduce carbon, silicon and manganese content, reduce the content of phosphorus and sulfur, improve the purity of steel, derived for two grade steel rim for 12LW and 5LW.
Ring type steel belongs to small special-shaped steel, with steel rim. In addition to the use of low alloy steel 16Mn, excellent
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