A bent channel is a metal (more often steel) product that has a U-shape. Due to the high strength and other qualities of the material, its versatility and operational properties, it enjoys serious interest from builders and installers, car manufacturers. The main advantage of the channel is the ability to become part of a reliable and at the same time lightweight metal structure with high strength. By the way, at channel prices remain among the most acceptable for construction.
The steel product is formed in a hot or cold way. In addition, in both cases, prices for the channel differ depending on the size of the products, and the channel itself differs in the height of the shelves. However, cold rolled products are also distinguished by their rounded corners on the outside of the product.
When choosing a channel, study its strength characteristics. The cold-rolled version has higher strength parameters, and in the process of processing on machine tools, any defects of the original blanks are eliminated. Thus, the channel will no longer need to be machined. Hot rolled profiles have a difference in thickness throughout the product.
Metal products are classified according to rolling accuracy - from class A (high-precision) to class B (normal accuracy), in shape and size - Y (with a slope of shelf edges), P (parallel shelf edges), E (economical), L ( light series) and C (special).
The channel is manufactured on roll forming machines, and the technical parameters are determined by GOST 11474-7b and 8278-83. Channel size varies from 1 m to 12 m, wall thickness - 2-8 mm.
Galvanized roll has a different nomenclature: steel in rolls is produced in sizes 0.45, 0.5, 0.7, 0.8, 1, 1.1, as well as 1.15, 1.2, 1.5 and 2 mm. The stardart that determines the quality of the product is GOST 14918-80 and 19904-90. At the same time, the sphere in which the galvanized roll is used differs from the channel - this is the automotive industry, the production of ships and wagons, household appliances, and instrument making.
Galvanized steel in rolls is an irreplaceable roofing material, cladding, necessary for the construction and organization of drainage systems, the so-called sandwich panels and for other construction needs.
Galvanizing belongs to one of four differently labeled groups: ХШ (for cold forming), PC (for painting), HP (for cold forming), OH (general purpose). Painted coils have a coating on both sides that can withstand operations such as rolling , drawing, bending and stamping.
Source: invest.severstal.com
