Steel Allied Products » Steel Sheets » Hot Rolled Steel Sheets

Hot rolled steel sheet is uncoated and is formed at a temperature of 860 degrees celcius at the mill and is reduced by maintaining the strip temperature. The product thus derived is termed as "mill finish" referring to the surface condition. The surface has a dull grey color with heat markings on the surface. There is a difference between the cold rolling and the hot rolling process. The hot rolling process is not as refined as the cold rolling process. The product produced from the hot rolling process lacks lusture and good surface finish as is the case with the cold rolled steel sheet. Hot rolled sheets are either used "as is" or are further modified in the cold reduction process for future use.

Hot rolled products are categorized under five heads, likewise:

• Structural
• Carbon
• Formable
• Extra Formable
• Hardness

Manufacturing Process:
Advanced thickness control technology is used to manufacture Hot rolled steel sheet in order to maintain it's thickness. The procedure is that cast slabs are continuously rolled for the required thickness. Due to hot rolling procedure the steel tend to carry oxide known as scale. Acid pickling is the process by which the surface oxide is removed if specified by the customer. The other customized features that are available in the hot rolled sheets are -

• Slitting
• Tempering
• Blanking
• Cut to length

Applications:
Hot rolled steel sheet has a wide application. Some usages are typical of hot rolled steel sheet like- The Automotive parts as in-

• Wheels
• Body structural components
• Brakes
• Bumpers
• Suspension components
• Interior components
• Drive train
• Hydro formed tubes

The Hot rolled sheets are also used in manufacturing tubular products like:

• LPG cylinders
• Pipes
• Shuttering plates (For construction work) too
• Pre-engineered buildings
• Sheet piling

Types of Hot rolled steel sheet:
The Hot rolled steel sheets are available in varied versions, each having specific qualities for some particular end usage. The Hot rolled steel sheet are of the following types-

• Non-Pickled Non Temper Rolled Sheet
• Non-Pickled Temper Rolled Sheet
• Pickled-Non Temper Rolled Sheet
• Pickled-Temper Rolled Sheet