Round bar steel round bar is a solid element manufactured by continuous casting process he circular section, possibly tuned by rolling or by cold-extruded, although the latter method is unusual in diameters larger than an inch since it requires an important mechanical power to be produced. The application of the rod and is evident mainly in the formation of axles, gears, pulleys, cams eventually, worm, and every element that has a circular section or that comes close to this geometry Continuous casting and consists mainly of a device distributed in different manufacturing lines Steel casting, this line has matrices with forms that want to make profiles that can be channels L, T-straps, Section I standard profiles, etc, a very important element of this type of construction is Wire which is not nothing but a metal product which is obtained by a hot rolling process by a special train designed for this effect, known as rolling mills, other major product is the same plate or plate metal plates that are 6 m lengths of steel or other material its usefulness is very wide, are usually constructed from the final form steel 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. 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 Useful resources on Steel and Iron for construction. Ali Partovi may find it difficult to be quoted properly.