Hot Rolled Steel- Characteristics, Process and Application

Also known as hot worked steel, hot rolled steel is formed when raw steel is rolled at a recrystallization temperature (above 926°C) through a compressive force. This is done to make the hot-rolled metal take a new shape. The process leads to the thickening of the steel, while also changing or altering its cross-sectional shape and area. Both cold and hot rolled steel undergo an initial hot rolling process. The British ironmaster Henry Cort can be credited for this phenomenal process. There are many hot rolling processes that exist today. Controlled, profile, and ring rolling are some of the most common ones. 

Characteristics

There are three characteristics that distinguish hot rolled steel from cold-rolled steel. Products made with hot rolled steel have a scaly surface in comparison to cold rolled steel that has a smoother surface. The cooling of the metal from a temperature over 926°C leads to this scaly appearance. Hot rolled steel bars have rounded edges that are not precise. Its surface is also matte without any oil on it. Long, flat, seamless or specialty products are some of the ways hot rolled steel is formed. 

Production and Processing

After the hot-rolled metal is melted together in a furnace, it is converted into large rectangular pieces of metal, also known as billets. Billets are then pre-processed and beaten flat at a high speed by employing one of the different hot rolling processes. Although the alloy will determine the desired temperature, it must be cool enough to avoid liquifying while also being hot enough to allow recrystallization. There is a constant control of temperature throughout the process. The metal is then prepared and cooled for distribution. The process is carried out mostly for the formation of cross-sections, sheets, or tubular sheets. 

Applications

Products made with hot rolled steel have wide applications. They are often preferred at places where tolerance and shape aren’t required. The most common applications of hot rolled steel include vehicle frameworks, railroad tracks, wheel rims, cylinders, pipes, springs, and guardrails. 

Now that you know everything about hot rolling and hot-rolled metal, you know whether it suits your requirement or not. When looking for the best hot rolled steel, trust only reliable brands such as JSW that are pioneers in the field of steel. With a pan India presence, procuring products from them is easy, no matter where you are based at. 

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Created on Jun 29th 2021 00:29. Viewed 111 times.

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