Product Description 

H-shaped steel is a kind of economical section and high-efficiency section with more optimized cross-sectional area distribution and more reasonable strength-to-weight ratio. It is named because its section is the same as the English letter "H". Since the various parts of the H-shaped steel are arranged at right angles, the H-shaped steel has the advantages of strong bending resistance, simple construction, cost saving and light structure weight in all directions, and has been widely used.
An economical cross-section profile with a cross-sectional shape similar to the capital Latin letter H, also called universal steel beam, wide edge (side) I-beam or parallel flange I-beam. The cross section of H-beam usually includes two parts: web and flange, also called waist and edge.The inner and outer sides of the H-shaped steel flange are parallel or nearly parallel, and the flange ends are at right angles, hence the name Parallel Flange I-beam. The thickness of the web of the H-beam is smaller than that of the ordinary I-beam with the same height of the web, and the width of the flange is larger than that of the ordinary I-beam with the same height of the web, so it is also named wide-edge I-beam. Determined by the shape, the section modulus, moment of inertia and corresponding strength of H-beams are significantly better than ordinary I-beams of the same single weight. Used in metal structures with different requirements, whether it bears bending moment, pressure load, or eccentric load, it shows its superior performance. Compared with ordinary I-beam, it can greatly increase the load-bearing capacity and save metal by 10%-40%. H-shaped steel has wide flanges, thin webs, multiple specifications, and flexible use. It can save 15%-20% of metal when used in various truss structures. Because the flanges are parallel inside and outside, and the edges are at right angles, it is easy to assemble into various components, which can save about 25% of the welding and riveting workload, which can greatly accelerate the construction speed of the project and shorten the construction period.
Purposeedit
Because of the above advantages, H-beams are widely used, mainly for: various civil and industrial building structures; various large-span industrial plants and modern high-rise buildings, especially industrial plants in areas with frequent seismic activities and high-temperature working conditions; requirements Large-scale bridges with large carrying capacity, good cross-section stability and large spans; heavy equipment; highways; ship skeletons; mine supports; foundation treatment and dam engineering; various mechanical components.
Classificationedit
There are many specifications of H-beam products, and the classification methods are as follows. (1) According to the flange width of the product, it is divided into wide flange, middle flange and narrow flange H-shaped steel. The flange width B of the wide flange and middle flange H-shaped steel is greater than or equal to the web height H. The flange width B of the narrow flange H-shaped steel is approximately equal to one-half of the height H of the web. (2) Divided into H-shaped steel beams, H-shaped steel columns, H-shaped steel piles, and extremely thick flange H-shaped steel beams according to product usage. Sometimes parallel leg channel steel and parallel flange T-shaped steel are also included in the scope of H-shaped steel. Generally, narrow flange H-shaped steel is used as beam material, and wide flange H-shaped steel is used as column material. According to this, it is also called beam H-shaped steel and column H-shaped steel. (3) According to the production method, it is divided into welded H-beam and rolled H-beam. (4) Divided into large, medium and small H-beams according to size specifications. Generally, products with a web height H above 700mm are called large, 300-700mm is called medium, and less than 300mm is called small. By the end of 1990, the world's largest H-section steel web had a height of 1200mm and a flange width of 530mm.
Internationally, the product standards of H-beams are divided into two categories: the imperial system and the metric system. The United States, Britain and other countries adopt the imperial system, while China, Japan, Germany, and Russia adopt the metric system. Although the units of measurement used in the imperial system and the metric system are different, most H-beams use four sizes to indicate their specifications, namely: web height h. Flange width b, web thickness d and flange thickness t. Although countries around the world have different expressions of H-beam size specifications. However, the size range and dimensional tolerances of the products produced are not much different.
Production methodedit
H-beam steel can be produced by welding or rolling. Welding H-shaped steel is to cut the strip of suitable thickness into suitable width, and weld the flange and web together on the continuous welding unit. Welded H-beams have disadvantages such as high metal consumption, difficulty in ensuring uniform product performance, and limited size specifications. Therefore, H-beams are mainly produced by rolling methods. In modern steel rolling production, H-beams are rolled using universal rolling mills. The web of H-beam is rolled between the upper and lower horizontal rolls, and the flange is rolled between the side of the horizontal roll and the vertical roll at the same time. Since only the universal rolling mill can't press down the flange edge, it is necessary to install an edge rolling machine behind the universal frame, commonly known as an edge rolling machine, in order to press down the flange edge and control the width of the flange . In the actual rolling operation, the two stands are used as a group, and the rolling piece is passed through several times (Figure 2a), or the rolling piece is passed through several universal stands and one or two rolling end stands. Composed of continuous rolling mill, a certain amount of reduction is applied in each pass to roll the billet into products of required specifications, shapes and sizes. At the flange part of the rolled piece, due to the sliding between the side of the horizontal roll and the rolled piece, the wear of the roll is relatively large. In order to ensure that the rolls after heavy vehicles can return to their original shapes, the sides of the upper and lower horizontal rolls of the roughing mill and the corresponding vertical roll surfaces should be inclined at 3°-8°. In order to correct the inclination of the flange of the finished product, a finished universal rolling mill, also called a universal finishing mill, is set up. The side of the horizontal roll is perpendicular to the axis of the horizontal roll or has a small inclination angle, generally not greater than 20', and the vertical roll is cylindrical.

Rolling H-shaped steel with a universal rolling mill can obtain a more uniform extension of the cross-section of the rolled piece, and the speed difference between the inner and outer roll surfaces of the flange is smaller, which can reduce the internal stress and shape defects of the product. Properly changing the reduction of the horizontal rolls and vertical rolls of the universal rolling mill can obtain H-beams of different specifications. The roll shape of the universal rolling mill is simple in shape, long in life, and the consumption of the roll can be greatly reduced. The biggest advantage of universal rolling mill for rolling H-beam is: In the same size series, only the thickness of the web and flange is changed, and the dimensions of the other parts are fixed. Therefore, the same series of H-beams rolled by the same universal pass have a variety of web and flange thickness dimensions, which greatly increases the number of H-beam specifications, and brings great convenience for users to choose appropriate dimensions.
In the absence of a universal rolling mill, sometimes in order to meet the urgent needs of production and construction, an ordinary two-high rolling mill can also be equipped with a vertical roll frame to form a universal pass rolling H-section steel. Rolling H-shaped steel in this way has low product dimensional accuracy, it is difficult to form a right angle between the flange and the web, the cost is high, and the specifications are small. It is extremely difficult to roll H-shaped steel for columns, so there are not many users.

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Shandong Chengming Steel Co.,Ltd

Our company supplies cold/hot-rolled stainless steel sheets,stainless steel bars ,stainless steel coil stainless steel pipes,lead plate,bearing steel,spring steel,steel plate pile,tank plate,alloy steel plate,weather resistant steel plate and wear resistant plate to many steel factories from at home and abroad, including Shanxi Taigang Iron& Steel CO,.LTD (TISCO) Zhangjiagang Pohang (ZPSS), Shanghai Krupp, Ningbo Baoxin and steel factories in Taiwan area, Mainland Chinese and foreign countries and regions.

Our annual capacity is 25, 000 tons. The Annual Domestic Sale is 20 million, Annual Exported Sale about 12 million dollars.Our products supplied to more than 20 countries, such as Indonesia, Spain, Japan, Korea, Vietnam, Italy, Israel,Australia, Malaysia, Brazil, Pakistan, U. A. E, Peru, India etc. Good quality has been getting more and more prise from buyers at home and abroad.Our long-term business lines are 304 .202, 201 .430.409L, 304L, 316L, 309S and 310S, Finish: 2B ,BA ,NO.1 NO.4 ,HL, NO.8 and so on . For the sheets and coils,the thickness ranging from 0.3mm to 100mm.For the bars,the diameter ranging from 1mm to 300mm.For the pipes ,we have seamless pipe and weld pipe. Meanwhile, our company is also engaged in the long-term supply of homemade & imported medium and thick plates,galvanized or carbon