There is a difference!
1. There are hot-rolled I-beams and hot-rolled H-beams. Only welded H-beams, no welded I-beams.
2. I-beam (Steel) does not include H-beam. Shenzhen galvanized sheet wholesale
refers to a steel plate with a layer of zinc plating on its surface. Galvanizing is a commonly used economic and effective anti-corrosion method. About half of the world's zinc output is used for this process. Galvanized sheet can be divided into hot-dip galvanized steel sheet, alloyed galvanized steel sheet, electro-galvanized steel sheet, single-sided and double-difference galvanized steel sheet according to production and processing methods. The main importing countries include China, Japan, and Germany , Russia, France, South Korea, etc. They are two types (Species) of steel.
3. There is no slope on the inside of the two outer edges of the H-shaped steel, which is straight. This makes welding and splicing of H-beams simpler than I-beams and better mechanical performance (xìng néng) per unit weight, which can save a lot of materials and construction time.
4. The H-beam rolling mill is a special-purpose mill. The difference from the I-beam is that the H-beam (Steel) tends to be "equally stable" compared to the I-beam, that is, the gap between the strong inertia and the weak axis of inertia Small, the difference in slenderness ratio between in-plane and out-of-plane is not large, so H-shaped steel is mostly used for columns (equal stability members are more reasonable for columns where the axial force is the main component), while I-beams (splicing) are mostly used for Beams (beams can limit partial instability through stiffeners, and can also limit bending torsional instability through lateral support). In fact, it is not necessarily true. My understanding is that the H-shaped steel has a reasonable cross section, so it will gradually be replaced in the future. For steel structure, H-shaped steel is mainly used. I-shaped steel is mainly used in secondary structures. It is not necessarily that I-shaped steel is mostly used for beams, and H-shaped steel is mostly used for columns. (Wide flange and middle flange) are mostly used for columns, HM and HN (mid flange and narrow flanges) in H-shaped steel are mostly used for main beams, I-beams are mostly used for secondary beams or combined (usually used for columns) .
1. Whether the I-beam is ordinary or light, because the cross-sectional dimensions are relatively high and narrow, the inertia moments of the two main sleeves of the cross-section are greatly different. The members that are bent in the plane of the web or are composed of lattice-type force members. It is not suitable to use axially-compressed components or components that are perpendicular to the web plane and also curved, which makes it very limited in application.
2. H-beams are high-efficient and economical (jīng jì) cut profiles (others include cold-formed thin-walled sections, gāng bǎn, etc.). Due to the reasonable cross-sectional shape (The shape), they can make steel better (Expressing the inherent ability) to improve the ability of adjudication. Unlike ordinary I-beams, the flanges of h-shaped steel are widened, and the inner and outer surfaces (biǎo miàn) are usually parallel, which can be easily connected with high-strength bolts and other components. Its size constitutes a reasonable series and complete model, which is convenient for design and selection. (Except I-beam for crane beam)
3. The flanges of H-shaped steel (Steel) are all of equal thickness, with rolled sections, and also combined sections composed of 3 plates welded (composition). I-beams are rolled sections. Due to the poor production process, the inside edge of the flange has a 1:10 slope. H-beam rolling is different from ordinary I-beams in that it only uses one set of horizontal rolls. Because of its wide flange and no slope (or very small slope), a set of vertical rolls must be added for simultaneous roll Rolling, therefore, its rolling process and equipment are more complicated than ordinary rolling mills. The maximum height of rolled H-shaped steel that can be produced in China is 800mm, which exceeds the welding cross section. China's national standard for hot-rolled H-beams (GB / T11263-1998) divides h-beams into narrow flanges, wide flanges, and steel piles, and their codes are h
Z, hk, and hu. The narrow flange h-shaped steel is suitable for beams or bending members, while the wide flange h-shaped steel and h-shaped steel piles are suitable for axial compression members or bending members. Compared with H-beam, under the premise of equal weight,
X and iy are not as good as h-beam.
4. The side length of I-beam is small and the height is large, it can only bear the force in one direction.
5. H-shaped steel grooves are deep and thick, and can withstand forces in two directions.
6. With the development of steel structure (Structure), only I-beams will not work, that is, thick I-beams, which are easy to lose stability for load-bearing columns.
7. I-beam can only be used for beams, and H-beam can be used for load-bearing columns of the structure. Shenzhen steel plate wholesale
is a flat steel made by pouring molten steel and pressing it after cooling. Steel plates are divided according to thickness, thin steel plates <4 mm (0.2 mm thinnest), thick steel plates 4 to 60 mm, and extra thick steel plates 60 to 115 mm. Steel plates are divided into hot rolled and cold rolled according to rolling. The steel plate is flat and rectangular, which can be directly rolled or cut from a wide steel strip. The steel type of the thick steel plate is substantially the same as that of the thin steel plate. In all aspects of the product, in addition to bridge steel plates, boiler steel plates, automobile manufacturing steel plates, pressure vessel steel plates and multi-layer high pressure vessel steel plates and other varieties are purely thick plates, some types of steel plates such as automobile beam steel plates (2.5 to 10 mm thick), patterns Steel plates (2.5-8 mm thick), stainless steel plates, and heat-resistant steel plates are intersected with thin plates.
8. H-section steel is an economical (jīng jì) section steel with better cross-section mechanical properties than I-beams. It is named because the shape of the cross-section is the same as the English letter "H". The flanges of hot-rolled H-beams are wider than I-beams, have greater lateral stiffness, and are more resistant to bending. H-beams are lighter than I-beams under the same specifications.
9. The flange of I-shaped steel is thicker on the web and thinner on the outside; the flange of H-shaped steel is equi-wearing
10. HW HM HN H is the general name of H-beam (Steel), H-beam is welded; HW HM HN is hot-rolled
11. HW is the height of the H-shaped steel and the width of the flange are basically equal; it is mainly used for steel cores in steel (Steel bar) and frame structure (Structure) columns, also known as stiff steel columns; in steel structures Mainly used for columns. Shenzhen cold plate wholesale
cold rolled coils are made of hot rolled coils at room temperature and below the recrystallization temperature, including plates and coils. Many domestic steel mills such as Baosteel, Wuhan Iron and Steel, Anshan Iron and Steel can produce them. The ones delivered in sheets are called steel plates, also called box plates or flat plates; those with long lengths and delivered in coils are called steel strips, also called coil plates. Has good durability, longer life compared to galvanized steel; has good heat resistance, is less prone to discoloration at high temperatures compared to galvanized steel; has similar processability and spraying performance to galvanized steel
12. HM is the proportion of the height of the H-beam and the width of the flange (proportion) is approximately 1.33 ~~ 1.75. It is mainly used in steel structures: used as steel frame columns and frame beams in frame structures subjected to dynamic loads; for example: equipment platforms . Shenzhen steel plate wholesale is a flat steel made by pouring molten steel and pressing it after cooling. Steel plates are divided according to thickness, thin steel plates <4 mm (0.2 mm thinnest), thick steel plates 4 to 60 mm, and extra thick steel plates 60 to 115 mm. Steel plates are divided into hot rolled and cold rolled according to rolling. The steel plate is flat and rectangular, which can be directly rolled or cut from a wide steel strip. The steel type of the thick steel plate is substantially the same as that of the thin steel plate. In all aspects of the product, in addition to bridge steel plates, boiler steel plates, automobile manufacturing steel plates, pressure vessel steel plates and multi-layer high pressure vessel steel plates and other varieties are purely thick plates, some types of steel plates such as automobile beam steel plates (2.5 to 10 mm thick), patterns Steel plates (2.5-8 mm thick), stainless steel plates, and heat-resistant steel plates are intersected with thin plates.
13. HN is the ratio of the height of the H-beam and the width of the flange greater than or equal to 2; it is mainly used for beams; the use of I-beams is equivalent to HN-beams.