Steel square bar produces a steel mill steel bars which are found primarily in two shapes round bar and square bar, and usually under two schemes: continuous casting and rolling. Square Bars are applied in the development and manufacture of items that require symmetry of features in the orthogonal axes X – Y, a situation which in itself ensures a comfortable machining, these pieces are due to many different applications, but it is usual fasteners find them in the manner of columns or beams of machinery parts, not to mention the famous "keys" that allow movement of a shaft integral with the driven element (sprockets, pulleys, cams, etc) Continuous casting is essentially a device that distributes different manufacturing lines Steel casting, this line has a parent with ways that you want to build profiles that can be channels L, T-straps, Section I standard profiles, etc, a very important element of this type of construction is wire rod which is not nothing but a metal product which is obtained through a hot lamination process thanks to a specially designed train for this effect, known as rolling mills, other major product is the tape or Platina the same metal plates that are 6 m lengths of steel or other material its usefulness is very wide, are usually constructed in the final form at the steel mill as a product. The continuous casting molds are cooled by water and allow the formation of long stretches of steel angles and other shapes, whose main application is verified in structural matters as due to the manufacturing process are considered practically isotrope and isothermal , and configuration of the material constant throughout its structure, therefore design techniques may be applied if inconvenient (correction factors) to the structural design. (Similarly see: Sigmund Freud). Besides the need described above is formed to control the cooling conditions for these products is ductile because it can cause rapid cooling in an irregular tightening resulting in fragility of the product. The composition of this product may vary depending on the application and the process used but is very common to find it with carbon contents of about 0.8%, proportions of other elements such as phosphorus of 0.48%, 0.30% manganese and others. There are some mechanical characteristics that must be controlled in the manufacturing process since the passage through the rollers, a process of decarburization and of itself, the temperature of the furnace exit after rolling should mediate in the 1100 degrees Celsius, cooling by air-laying is also important, it is well known that the cooling scheme in the formation of martensite, or austenite. There are bars of rectangular, diamond, elliptical and even trapezoidal these applications due to special orders usually associated with industries with a huge production goods, such as the automotive and shipbuilding are also known that these bars on request, may show very specific characteristics of material.