What’s the difference between hot rolled and cold rolled steel


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Hot rolled steel and cold rolled steel are two different processes used to produce steel sheets or bars, each with distinct characteristics:

  1. Hot Rolled Steel:
    • This process involves heating steel above its recrystallization temperature and passing it through rollers to achieve the desired shape or thickness.
    • Hot rolled steel tends to have a rougher surface and rounded edges compared to cold rolled steel.
    • It is less expensive to produce than cold rolled steel and is typically used for structural components, railroad tracks, and general construction.
  2. Cold Rolled Steel:
    • Cold rolling involves passing hot rolled steel through rollers at room temperature to achieve precise dimensions and improve surface finish.
    • Cold rolled steel has a smoother surface finish and tighter tolerances compared to hot rolled steel.
    • It is often used in applications where precise dimensions and a smoother surface are required, such as automotive parts, appliances, and metal furniture.

In summary, while both hot rolled and cold rolled steel serve various purposes in manufacturing and construction, they differ in terms of surface finish, dimensional accuracy, and cost. The choice between hot rolled and cold rolled steel depends on the specific requirements of the application and the desired properties of the finished product.


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