Hot Rolled (HR) Coils are high grade steel coils that are used for industrial applications. Hot rolled coils are manufactured by rolling steel at a temperature above the natural recrystallization temperature of steel.
Hot Rolled Coils are made by continuous rolling of steel at high temperature, generally over 1,000 degrees Fahrenheit. The process involves passing metal sheets, produced from billets, through rollers above the metal’s (steel) recrystallization temperature. The metal sheets may be passed through the roller many times to achieve the desired dimension. During the cooling process, the hot rolled steel may reconfigure itself resulting in an end product that is more flexible and more loose as compared to the original product.
The hot rolled coils are manufactured without much delay in order to avoid the need for reheating the steel during the manufacturing. The entire process of manufacturing HR coils is known as hot rolling. As the steel cools off it automatically shrinks; usually it is not easy to predict the size and shape of the end product of a hot rolling.
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