• Hot Rolled (HR) - Hot Rolled is the most basic and usually the least expensive type of flat-rolled steel. It can be used as is or undergoes further processing to become Cold Rolled or coated products.
  
  
• Hot Rolled Pickled & Oiled (HRPO) - A product that has been washed in hydrochloric and/or sulfuric acid to remove scale and rust.  After pickling the material is usually oiled to protect against rust. Provides a smoother surface for painting or other surface sensitive applications.
  
  
• Galvanized - Galvanized is produced from Cold Rolled or Hot Rolled Pickled & Oiled coil that has been passed continuously through a pot of molten zinc. The amount of coating applied to the surface is controlled by wiping, rollers and/or air jets. The zinc coating creates a barrier that retards the formation of rust. The amount of zinc applied affects the steel's corrosion resistance. The more the zinc, the more the corrosion resistance. The amount of zinc (coating weight) is represented in ounces per square foot total of both sides.
  
  
• Cold Rolled (CR) - used when a customer specifies thinner sheet than that obtainable by hot rolling, the sheet must be cold rolled. Cold rolling produces a more accurate thickness and a smoother surface.Cold Rolled coils are produced by cold reducing Hot Rolled Pickle and Oil to the ordered thickness and then annealing to develop specific physical properties. Cold Rolled has a smoother surface, closer gauge tolerance, and is typically flatter.
  
  
• Aluminized - Aluminized steel sheet is made from a Cold Rolled substrate, upon which a hot-dipped Aluminum-Silicon coating is applied to both sides. It offers excellent resistance for applications in which a combination of heat and corrosion resistance is required. It generally affords about twice the corrosion protection of hot-dipped galvanized.
  
  
• Electro Galvanized - produced from a cold rolled substrate, upon which a very thin layer of zinc has been electrolytic ally deposited to one or both sides. Because the zinc coatings are much thinner compared to hot-dipped, the product is usually intended for interior applications having little atmospheric exposure. It’s generally has lower resistance to rust but offers good weldability and formability.
  
  
• Galvanneal - is the result from the combined process of galvanizing and annealing. The galvanization is made through the Hot-dip galvanizing process and gives a very fine greyish matte finish. Galvanneal does not flake off its galvanized coating when formed, stamped, and bent. The finish allows paint to adhere easily, and is very rust proof. Galvanneal sheets or coils are formable and offer good weldability and paintability, also has excellent corrosion resistance.
  
  
• Galvalume - Steel sheet with a unique coating of 55% aluminum and 45% zinc that resists corrosion. Galvalume and galvanized sheet steels are made by a “continuous hot dip” process.
  
  
• Stainless Steel - Stainless steel is produced in an electric arc furnace where carbon electrodes contact recycled stainless scrap and various alloys of chromium (and nickel, molybdenum etc. depending on the stainless type). A current is passed through the electrode and the temperature increases to a point where the scrap and alloys melt.

The molten material from the electric furnace is then transferred into an AOD (Argon Oxygen Decarbonization) vessel, where the carbon levels are reduced and the final alloy additions are made to make the exact chemistry. Most stainless steels receive a final annealing (a heat treatment that softens the structure) and pickling (an acid wash that removes furnace scale from annealing and helps promote the passive surface film that naturally occurs).