Standard for welding quality of I-beam
I-beam is mainly divided into ordinary I-beam, light I-beam and H steel three.Ordinary I-beam, light I-beam flange is variable cross-section, depending on the thickness of the web, the external thin; H steel: HW, HM, HN, HEA, HEB, HEM and so on, the flange of I-beam is a uniform sectionOrdinary I-beam, lightweight I-beam has formed the national standard, the common 10# I-beam is equivalent to the Internet I100 (such as 10# also channel equivalent channel (U100) for the implementation of the standards of different countries, which have subtle differences in their specifications)H type I-beam is also called wide flange I-beam, HW, HM, HN originated from European standards, HEB is the German standard of I-beam, of which HW, HN I-beam has been widely used in our country and production. HEA HEB HEM will be seen on many German designs and is hard to buy on the domestic market. In the domestic steel structure engineering, if the quantity is few, then may use the specification steel plate to carry on the welding splicing. In the case of large quantities, it is usually considered to use mechanical properties comparable to those of HW and HN steel.
The narrow flange H steel is suitable for beams or columns, while wide flange h and H steel piles are suitable for axial compression members or bending members. Ordinary I-beam, light I-beam compared with HW, HN steel, under the premise of equal weight, W, IX and iy are not as good as H steelI-beam is also called steel girder (English name Universal Beam). It is a strip of steel with an I-shaped section. I-beam is made of ordinary I-beam and light i-beam. It is a section steel whose shape is trough.
The standard joint of the I-beam butt joint is inclined with a front angle of 30 degrees and two butt joint, and a plate is added on both sides during the safe period. welding technologyThe flanges of H steel are all of equal thickness, there is a rolling cross section, and there is a combined section composed of 3 plates welded together. Ordinary I-beam is a rolling section, due to poor production process, flange inside the edge of the 1:10 slope. H type steel rolling is different from ordinary I-beam with only one set of horizontal roll, because of its wide flange and no inclination (or inclination is to be very small), a group of vertical roll and roll, therefore, the rolling process and equipment than the conventional mill complex. The maximum rolled H steel produced in China can be 800mm high and can only be welded composite sections.
