The hot rolling process is rolling steel at a temperature above the recrystallization temperature, which is 1700 degrees Fahrenheit. Steel can be shaped easily when it’s above the recrystallization temperature as compared to cold steel. One more advantage of HR steel is that it is cheaper to manufacture than CR steel. It is produced without any delays in the procedure so the steel does not need to be reheated. HR steel shrinks during the cooling procedure and its size and shape also change.
HR Steel Appearance
HR steel products have a grey layer of finish and their corners are usually rounded and less precise. So, many times HR steel is used where extremely precise dimensions are not required, and neither is the appearance.
Mechanical Properties of HR Steel
The mechanical properties of any kind of steel depend on their grade or chemical composition. This is the reason one should not simply guess the mechanical properties of HR or CR steel unless they’re the same grade.
Hot Rolled Steel Uses
Hot rolled steel bars, railroad tracks, H-beams, I-beams, bridges, ships, automobiles, and other steel products are manufactured using HR steel because they don’t require precise shapes.