Hot rolled steel is a type of steel that is made by heating and cooling slabs of steel to form specific shapes and sizes. The heating process takes place in a furnace, where the steel is heated to a temperature above its recrystallization temperature. This allows the steel to be easily shaped and molded.

Once the steel has been heated, it is then cooled and shaped into the desired form. This process results in a product that has a rough, dull surface finish and a uniform grain structure. The surface finish is due to the scale that forms on the steel during the heating process, which is then rolled into the surface of the steel.

Hot rolled steel is commonly used in the construction and manufacturing industries, as it is known for its strength, durability, and versatility. It can be used for a wide range of applications, including building structures, bridges, and machinery components.

Compared to cold rolled steel, hot rolled steel has a greater capacity for malleability and ductility, which makes it easier to form and shape into specific shapes and sizes. However, it also has a rougher surface finish and is more prone to warping and surface defects, which can be addressed through additional processing or by using cold-rolled steel for more critical applications.

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