Hot Rolled Steel
Ductility (the ability to deform under tensile stress) by heating the steel above its point of recrystallization & passing it through rollers; this increases tonnage, makes it thinner & softer.
Hot Rolled Pickled & Oiled Steel
After hot rolling, the steel is bathed in acid to strip surface oxides (pickled), then oiled to resist rust.
Flat rolled steel products for which the final required thickness has been obtained by rolling base hot rolled pickled substrate at room temperature. The initial product through the work rolls is Cold Rolled Full Hard & from there the coils need to be Annealed to become fully processed Cold Rolled Steel. Rolling without heating can increase steel strength up to 20% & maximize the tonnage.
Hot Dipped Galvanized Steel
Steel sheets with a zinc coating that is applied by passing the steel through a bath of molten zinc. The zinc enhances the steel’s corrosion resistance. The product is available with various thicknesses of zinc coating. In general, the corrosion resistance of the coating is directly proportional to the coating thickness.
Galvanized sheet steel which is altered immediately before the zinc solidifies by either heat treatments or other processes. The coating consists entirely of iron zinc alloy & is rougher than that of a regular coating. Sheets produced have a dull gray color & after proper preparation, are well suited for painting. Sometimes referred to by the trade name ‘Jet-Kote.’
Steel hot-dipped with an aluminum silicon alloy takes on some of the better properties of both metals & resists corrosion.