Learn The Difference Between Hot Rolled Steel vs. Cold Rolled Steel

Cold work steel
Industrial Applications by China Cold work steel D2 D3 Supplier
December 31, 2019
Cold work steel D2 D3 Supplier

Steel is offered in several shapes, specifications, grades and finishes. There are various kinds of steel which are used in numerous applications like wind turbines, vehicles, appliances and infrastructure. Moreover, the process of manufacturing steel can also have an impact on steel products. Therefore, it is essential to contact a reliable China Cold work steel D2 D3 Supplier to have your project done.

Talking about grades, there are two main types of pre-fabricated steel products known as hot rolled steel and cold rolled steel. Thinking about the difference between the two? Read in to get the answer:

Difference between Hot Rolled and Cold Rolled Steel

It is essential to note the main difference between hot rolled and cold work steel. The significant difference is in the process. Hot rolling means process is done with heat. Cold rolling means process performed at or near room temperature. Although these methods affect the application and overall performance, they should not be confused with specifications or steel grade that relates to performance ratings and metallurgical composition. A Rust-proof Mirror Steel Manufacturer can tell that the specifications can be either cold or hot rolled.

Understanding the differentiating points between hot and cold steel is crucial to prefer one over the other.

Hot Rolled Steel

Hot rolled steel is a steel that gets roll-pressed at extreme temperature, i.e. over 1,700 Degrees Fahrenheit. The temperature is above the heat needed for re-crystallization for most steels. This makes steel to form and result in products which are easier to work with.

Since hot work steel is cooled after the process, there is less control over its final shape that makes it less suitable for precision uses. Hot rolled steel is often utilized in applications where micro specific dimensions are not critical. Construction work and railway tracks often use hot rolled steel.

hot rolled steel

Following are the characteristics held by hot rolled steel:

  • Scaled Surface – A residue of cooling from extreme temperatures
  • A bit rounded corners and edges for plate and bar products (because of less precise finishing and shrinkage)
  • Small distortions, where cooling might result in modest trapezoidal forms, contrary to perfectly squared angles.

Cold Rolled Steel

Cold rolled steel is permanently hot rolled steel which goes through further processing. Once hot rolled steel cools down, it is then re-rolled at room temperature for achieving more specific dimensions and better surface qualities.

Following are the characteristics that can identify cold rolled steel:

  • Bars are square and accurate, and often have right looking corners and edges
  • Smooth surfaces that often, are oily to touch
  • Better with more finished surfaces with closer tolerances
  • Tubes contain better concentric straightness and uniformity.

Know the Benefits of Cold Rolled Steel

  • Having better surface attributes compared to hot-rolled, it is no surprise that cold-rolled steels are often used for more technical and precise applications.
  • They come at a higher cost because of excess processing for cold finished articles.
  • Cold Rolled Steel is usually stronger and harder compared to conventional hot-rolled steels.

Wrap Up

I hope that this blog will clear the difference among the two steel products.

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