Steel is a certain section shape and size of the strip steel, is the four major varieties of steel (plate, tube, type, silk) one. According to the section shape, the section steel is divided into simple section steel and complex section steel. The former refers to square steel, round bar, flat steel, angle steel, hexagonal angle, etc. the latter refers to I-beam, channel steel, rail, window frame steel, curved steel and so on.
According to the different smelting quality of steel, the section steel is divided into ordinary steel and high quality steel. Ordinary steel According to the current Metal products catalog is divided into large-scale steel, medium-sized steel, small steel. Ordinary steel according to its cross-section shape can be divided into I-beam, channel steel, angle steel, round steel and so on.
Large-scale steel: Large-section steel, steel, steel, angle, flat steel is hot-rolled, round, steel, six-angle in addition to hot-rolled, but also forging, cold drawing and so on.
I-beam, channel steel, angle steel widely used in industrial buildings and metal structures, such as plant, bridges, ships, agricultural machinery, vehicle manufacturing, transmission towers, transport machinery, often with the use of. Flat steel is used in construction sites as bridges, Fang, fences, transmission ships, vehicles, etc. Round steel, steel used as a variety of mechanical parts, agricultural machinery accessories, tools and so on.
Medium type Steel: Medium type Steel middle type steel, trough, angle, round, flat iron, use and large-scale steel similar.
Small steel: small steel medium angle, round, square, flat, processing and use similar to large-scale steel, small diameter round bars are commonly used as building steel.
Application characteristics of H-beam
The hot-rolled H-section has good mechanical properties and excellent performance, according to the reasonable distribution of the section size of the high aspect ratio.
The design style is flexible and rich. In the same case, the steel structure can be 50% more than the beam of the concrete structure, which makes the layout of the building more flexible.
The structure is light weight. Compared with the weight of the concrete structure, the weight of the structure is reduced, the internal force of the structure is reduced, and the basic treatment requirements of the building are low, the construction is simple and the cost is reduced.
The steel structure, which is mainly hot rolled H-section, is of reasonable structure, good plasticity and flexibility, high structure stability, suitable for building structure with large vibration and impact load, strong ability of resisting natural disasters, especially suitable for building structures with many seismic occurrences. According to statistics, in the world in the event of more than 7 devastating earthquake disasters, H-beam steel structure of the main damage to the minimum.
Increase the effective usable area of the structure. Compared with the concrete structure, the sectional area of steel structure column is small, which can increase the effective usable space, depending on the different form of the building, can increase the effective usable area Cadbury.
Compared with the welding H-beam, it can obviously save the raw material, energy and artificial consumption, low residual stress, good appearance and surface quality.
Easy to be machined, structurally connected and installed, and easy to dismantle and reuse.
The use of H-beam can effectively protect the environment, the specific performance in three aspects: one is compared with the concrete, may use the dry type construction, produces the noise to be small, the dust is few; second, because the self-respect reduces, the foundation construction takes less soil quantity, the land resources destruction is small, moreover reduces the concrete dosage, reduces the digging stone quantity, is advantageous to the ecological environment protection Thirdly, after the structure has been demolished, the amount of solid waste produced is small and the recycling value of waste steel resources is high.
The hot-rolled H-beam steel structure is highly industrialized in production, which is convenient for mechanical manufacturing, intensive production, high precision, convenient installation and easy to guarantee, and can be built into a real house making factory, bridge making factory, industrial factory factory and so on. The development of steel structures has created and driven hundreds of new industries.
Construction speed, small footprint, and suitable for all-weather construction, affected by climatic conditions small. The construction speed of steel structure made by hot-rolled H-section is about 2-3 times of the construction speed of concrete structure, the capital turnover is doubled and the financial cost is reduced, thus saving investment. Taking the "Jin Mao mansion" of Shanghai Pudong of China as an example, the structural main body of high near $number m has completed the cap of structure in less than half a year, and the steel mix structure takes two years.
Application features of Angle steel
Angle steel: Commonly known as angle, is a long strip of steel that is perpendicular to each other in angular form. There are equal-angle steel and unequal angle steel.Equal to two sides of the steel, the size of the edge width x edge width x edge of the millimeter number is expressed. such as "∠30x30x3", that is, the Benquan is 30 mm, Binghou 3 mm of equal angle steel.can also be used model, the number is the width of the centimeter, such as∠3#。The model does not indicate the size of the different sides in the same model, so the Benquan and edge thickness of the angle steel will be completed in the contract and other documents, so as to avoid the individual model. Hot-rolled and other corner steel specifications for2#-20#。The angle steel can be composed of different force components according to the different needs of the structure, as well as the connecting parts between the components. Widely used in a variety of structural and engineering structures, such as housing beams, bridges, transmission towers, hoisting machinery, ships, industrial furnaces, reaction towers, container racks and storage shelves.
Application Characteristics of channel steel
The channel steel is a long strip steel section with concave groove shape. Its specification method, such as 120*53*5, means the waist height is 120 mm, the leg width is 53 millimeters, the waist thickness is 5 millimeters steel, or is 12# . called the trough steel.Waist height of the same channel steel, if there are several different legs and waist thickness also need to be on the right side of the model plus a B c to distinguish, such as.25a# 25b# 25c#.The trough steel is divided into ordinary channel steel and light channel steel. The specification of hot rolled ordinary trough steel is 5-40#. The hot rolled flexible steel specifications supplied by both supply and demand agreements are 6.5-30#.The channel steel is mainly used in building structure, vehicle manufacture and other industrial structure, and the channel steel is often used with the I-beam.
Application characteristics of I-beam
I-beam is also known as steel girder, is a section of the long strip steel. The size of the waist height (h) * Leg width (b) * The waist thickness (d) of the number of millimeters, such as "160*88*6", that is, the waist height of 160 mm, leg width of 88 mm, waist thickness of 6 mm I-beam. I-beam specifications can also be used model, the number of centimeters high waist, such as work16#. I-beam with the same waist height, if there are several different legs and waist thickness, you need to add a B c to the right to distinguish between the model, such as 32a# 32b# 32c#.I-beam for ordinary I-beam and light-beam, hot-rolled ordinary I-beam specifications for 10-63#. The normal steel-I-beams supplied by both supply and demand agreements are 12-55#. I-beam is widely used in a variety of building structures, bridges, vehicles, stents, machinery and so on.
Application Characteristics of cold-formed Steel
Cold-formed Steel is the main material for making light steel structure, which is made of steel plate or steel belt cold bending forming. Its wall thickness can not only be made very thin, and greatly simplifies the production process, improve production efficiency. Can be produced by the general hot rolling method is difficult to produce a uniform but complex cross-section shape of various profiles and different materials of cold bending steel. Cold-Formed steel in addition to a variety of building structures, but also widely used in vehicle manufacturing, agricultural machinery manufacturing and so on.
Profiled steel including gear ring, horseshoe steel, magnetic pole steel, presser feet, shallow groove steel, small groove steel, T-steel, ball flat steel, send cloth dental steel, hot-rolled hexagonal angle. There are also rivets steel, agricultural tools steel, window frame steel.