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Steel Beam
I-beam is mainly divided into ordinary I-beam, light I-beam and low alloy light I-beam. Ordinary I-beam and light I-beam flanges are thick on the web plate and thin on the outside. Ordinary I-beam, light I-beam, because the cross-sectional dimensions are relatively high, narrow, so the section of the two main sleeve moment of inertia difference is large, which makes it in the scope of application has a great limitation. The use of I-beam shall be selected according to the requirements of the design drawings.
H-beam is a new type of steel for economic construction. H-beam has economical and reasonable cross-sectional shape, good mechanical properties, uniform extension of each point on the cross-section and small internal stress during rolling. Compared with ordinary I-beam, H-beam has the advantages of large cross-sectional modulus, light weight and metal saving, which can reduce the building structure by 30-40%. In addition, because its legs are parallel to the inner and outer sides and the leg ends are right angles, the welding and riveting work can be saved by 25%. It is often used in large buildings (such as factories, high-rise buildings, etc.) with large bearing capacity and good cross-sectional stability, as well as bridges, ships, lifting and transportation machinery, equipment foundations, supports, foundation piles, etc.
Stainless steel I-beams are made of 201(1Cr17Ni5Mn6N), 202(2 Cr13Mn9Ni4), 301(1 Cr17Ni7), 303(Y1Cr18Ni9), 304(OCr18Ni9), 304L (03 Cr19Ni10), 316(0 Cr17Ni12Mo2), 316L(00 Cr17Ni14Mo2), 321 (1 Cr18Ni9Ti), 420( 2cr13), 310S(0 Cr25Ni20), etc. The chemical composition of stainless steel I-beams belongs to general structural rolled steel series, the main test indexes were C, Mn, P and S. According to different grades, the content varies, the approximate range is C<0.08%, Mn: 2.0, P<0.035%, S<0.03%. Materials are widely used in hardware products, medical machinery, food machinery, ships, automobiles, doors and windows, furniture, large machinery, etc.
H-beam is a more optimized cross-sectional area distribution, more reasonable than the economic section of high-efficiency profiles, because of its section and the English letter "H" the same name. Since all parts of the H-beam are arranged at right angles, the H-beam has the advantages of strong bending resistance, simple construction, cost saving and light structure in all directions, and has been widely used.
Galvanized H-beam is a cross-sectional area distribution is more optimized, more reasonable than the economic section of high-efficiency profiles, because of its section and the English letter "H" the same name. Since all parts of the H-beam are arranged at right angles, the H-beam has the advantages of strong bending resistance, simple construction, cost saving and light structure in all directions, and has been widely used.
Hot-dip galvanized I-steel is also called hot-dip galvanized I-steel or hot-dip galvanized I-steel. It is to immerse the I-beam after derusting into molten zinc at about 500 ℃ to attach a zinc layer to the surface of the I-beam, thus achieving the purpose of anti-corrosion. It is suitable for strong corrosive environments such as various strong acids and alkali fogs.