Hot Rolled Steel vs. Cold Rolled Steel

15
Dec

Hot Rolled Steel vs. Cold Rolled Steel

Hot rolled and cold rolled are the mill processes that involve extreme heat or cold work to manufacture or produce steel. These procedures apply various heat procedures such as forging, pitting and other heat techniques. Hot rolling involves forming steel at extremely high temperatures. Similarly, the cold-rolled involves developing at an extremely cool temperature

Hot Rolled

Hot rolled is one of the most popular heat procedures in the steel manufacturing industry. This technique is commonly being used in various steel mills. This includes rolling steel at moreover 1700°F. This is also considered steel’s recrystallisation temperature, where the steel showcases excellent workability and formability. The hot rolling starts with a large steel billet, and it is usually heated and then squashed into a big roll. Later it is transferred to the rotating rollers to achieve the desired size. In this metal sheet manufacturing function, these sheets are converted into coiled rolls.

Advantage of using hot rolled steel:

Hot rolled steel is enriched with various properties and characteristics. These hot-rolled sheets are being used in multiple industries for multiple purposes.  

  • Excellent workability: Hot rolled processes transpire at high temperatures. The processing of the grade provides excellent easy forming and shapes. 

  • No internal stress or breakage: hot rolling is a time-consuming procedure; it involves cooling the steel moderately. Cooling is the most dominant procedure as it allows steel material to normalise its structure, which helps get the best possible shape. 

  • Low maintenance and cost: Hot rolled sheets are comparatively cheaper than cold rolled sheets. It is straightforward to maintain them as they have less processing.

Application

The application of hot-rolled sheets is commonly used for hot intensive applications. These rolled sheets are basically used for manufacturing various types of equipment in various industries such as

Agricultural pieces of equipment
Railway equipment
Automobile parts
Construction sites


Cold-Rolled Sheets

Both the sheets go through a lot of procedures which helps the grade in achieving the accurate dimension, mechanical and physical properties. During the manufacturing of the cold-rolled sheets, it goes through several series of rolls at room temperature. Later it is converted into its desired shape, size or dimension.

Advantage of Using Cold Sheets:

High strength: The cold working on the metal can exhibit its strength than hot rolled working, and it also makes it a perfect application for industrial and commercial usage. Cold-rolled sheets can withstand more pressure than hot-rolled sheets.

Excellent accuracy: Cold rolled sheets do not shrink after the forming procedure. Which allows grade in getting the most precise measurements and dimensions. Cold-rolled sheets do not require any secondary approach. 

Excellent surface finish: All the products made from cold procedures have a shiny and smooth finish, providing excellent protection from erosion and rusting.

Applications: These cold rolled sheets are applicable in all industries, and they are suitable for every kind of work. These sheets are used for the manufacturing of various products and equipment.

  • Home appliances 
  • Aerospace structure 
  • Metal furniture 
  • Mechanical components