Sheet steel hot-rolled is a metal product of the simplest geometric configuration, which in modern production is a very popular consumable. The product has found application in various areas of the economy, in architecture, construction, civil and military aviation, in the production of automobiles, machine tools, bridges, decoration and design.
The popularity of this product is largely due to a fairly low price on the hot-rolled sheet. In most cases, the product is purchased for further processing. For example, the metal is stretched and cut, thus obtaining a perforated exhaust sheet, from which later street fences, reinforcement, staircases and other products are manufactured. Qualitatively produced hot-rolled sheet easily withstands rolling, stamping and drawing.
When manufacturing steel materials are guided by the requirements of state standards. For the production of hot-rolled steel sheets, hot rolling technology is used. To create the material use both low-alloy and simple carbon steel. The hot-rolled sheet is produced by pressure treatment of metal heated to high temperature on calibrated or smooth rolls. Supply of this type of products is carried out in rolls or sheets.
The hot-rolled sheet has the following characteristics. The accuracy of rolling distinguishes two classes of these materials with a thickness of up to 1.2 centimeters. To class A belong products with increased accuracy, and to category B - with normal. To mandatory quality characteristics of products include the minimum values of resistance (temporary).
In addition, there is a thick plate, which is divided into six groups. The first five characterize the production of hot-rolled sheets. The latter category includes products with increased strength. Thin sheets are produced with normal, high and particularly high flatness.
The most complicated process of production of hot-rolled steel sheets begins with the receipt of blanks (slabs) for a metal-working enterprise. These components are usually cast from carbonaceous or alloyed steel.
At the next stage slabs are sent to a rolling mill, with which steel bars are given the necessary size and shape. In appearance , the hot-rolled sheet may differ depending on the profile used and the rolls used. Hot steel gets the necessary thickness during the advancement of the rolling mill. In this case, there are two production stages: roughing and finishing. If pruning uneven edges was not done, then the hot-rolled sheet is classified according to technical standards as unedged.