Mills – 4-HI

Mills - 4-HI

Tandem Cold Mills
Cold rolling is accomplished by processing steel strip through a series of Tandem Rolling Mill “Stands.” Each stand has vertically assembled rolls that are powered by large motors to transmit high compressive pressures into the material. Hot-rolled, pickled coils are fed into the cold rolling mill from an uncoiler and continuously reduced in thickness by each stand to attain the desired thickness. Upon exiting the last Mill Stand, the strip is then recoiled.

Reversing Cold Mill
The Reversing Mill is another method of cold reduction. In this process, the material is passed back and forth between reels on each side of a single-stand or two-stand mill. The material is reduced in thickness on each pass until the final required thickness is realized.

Temper Mill
The Temper Mill process is not looking to make reductions in the material but is performed to improve the sheet flatness, to remove yield point elongation, and to impart a uniform surface on the sheet.

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