Flat steel products are made from Slabs, rolled and mechanized in different processes to achieve the desired final shape.
Hot Rolled Plates
Flat rectangular steel products produced from slabs, with thicknesses from 5 - 150 mm.
Plates are used in shipbuilding, in the production of pressure equipment and vessels such as boilers, as well as in engineering, construction applications and large pipelines.
Hot Rolled Coils, Sheets and Strips
Hot rolled coils are produced from slabs that are re-rolled at above re-crystallization temperature to produce a thinner sheet (between 1 and 20 mm). This long steel sheet can be bound in coil form, cut-to-length or slit into narrower strips to give it the desired shape.
Tube makers bend and weld the steel coil, sheet or strip to produce tubes for a variety of applications. Hot rolled products are also feedstock for upstream processing into higher value industrial products. They can be modified at cold rolling mills or by applying different coatings.
Cold Rolled Coils, Sheets and Strips
Cold rolled coils are produced from re-rolling hot rolled coils under heat lower than re-crystallization temperature into thicknesses down to 0.2mm. This process improves the strength of the steel up to 20%. It also improves the surface finish and permits a tighter control of tolerances.
Common uses are tube and pipe making, white goods manufacturing, cutting to length and further processing by galvanizing and coating into higher value products. Higher grades of cold rolled coils are used for automotive applications.
Pre-Painted and Galvanized Products
Hot-dip galvanizing is the process of coating steel with a thin layer of zinc by passing the metal through a bath of molten zinc. The zinc coating prevents oxidation of the protected metal, as it increases its corrosion resistance, contributing to its longevity.
Galvanized steel is widely used in applications where rust resistance is needed, and can be identified by the crystallization patterning on the surface usually called a “spangle”. Common uses for galvanized steel are roofing and walling, safety barriers, handrails, consumer appliances and automotive body parts. The galvanized steel coils and sheets can also be painted to offer further corrosion protection and provide the material different colors as various applications may require.