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Hot Rolled Steel: How It Is Made

Hot Rolled Steel: How It Is Made

Submitted by • May 15, 2020

How Hot Rolled Steel is Made
Hot rolled steel is the most basic carbon steel product mills produce. It is used to manufacture products in which the surface finish is not critical, including automotive, truck frames, water heaters, agriculture equipment, compressor shells, guard rails, and the list goes on.

The Heating Process
The process in which hot rolled is produced begins with heating slabs of steel to approximately 2,300 degrees Fahrenheit. The amount of heat directly affects the properties of the steel. Meaning, if the temperature is not high enough it can cause defects in the material. This is likely due to carbides (compound of carbon) and nitrates not fully dissolving.

When the hot material is being transferred from the furnace it reacts with the oxygen in the air. This reaction forms a mill scale or a flaky surface of iron oxides. The mill scale can affect the surface quality of the hot rolled steel if left alone. To remove the iron oxides the material i

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