Cold Rolled Steel Sheet Manufacturing Process

A clean surface is essential to the cold rolling and subsequent processes to achieve the desired qualities of the surface.

Cold rolled steel sheet manufacturing process.

Hot rolled coils are processed in a continuous pickling line where scale is removed. It also improves the strength and surface finish that hold the product tighter and make it more tolerant. Compared to hot rolled steel cold rolled steel has a nearly 20 increase in strength through the use of strain hardening. Cold rolled sheet in coil form is produced by removing rust from hot rolled sheet by pickling it in a weak acid solution then washing brushing drying oiling and unrolling the sheet and finally performing cold rolling by passing the sheet through a reducing mill under pressure and winding it into a roll.

This process will produce steel with closer dimensional tolerances and a wider range of surface finishes. This post will explain the four different steel forming process. Cold rolling takes the hot rolled product and processes it further. Despite the name this process refers to steel that is pressed with the pressure of a roller at room temperature.

In this process the strip stock or the sheet metal is given between rollers in order to compress and squeeze it. In general cold rolled steel sheet can hold tighter tolerances than hot rolled when machined or otherwise fabricated and provides a better overall surface finish. Cold rolling is a process used in cold reduction mills. After hot rolling the steel is cooled to room temperature then passed through cold rollers at a temperature lower than its recrystallisation temperature.

This rolling process is called annealing and relieves stress and leads to a higher yield strength and greater hardness. In terms of usage hot rolling processes more tonnage than any other manufacturing process and cold rolling processes the most tonnage out of all cold working processes. In cold rolling steel sheet is cooled at room temperature after hot rolling and is then annealed and or tempers rolled. The terms are opposed to hot formed steel and hot rolled steel.

Cold formed steel cfs is the common term for steel products shaped by cold working processes carried out near room temperature such as rolling pressing stamping bending etc. Cold rolled steel as you might suspect the manufacturing process behind cold rolled steel is a bit different. Cold rolled steel is essentially hot rolled steel that has had further processing. Pickled coils are rolled in a cold reduction mill where they are reduced to specific thickness.

The steel is processed further in cold reduction mills where the material is cooled at room temperature followed by annealing and or tempers rolling. 1 2 roll stands holding pairs of rolls are grouped together into rolling mills that can quickly process metal typically steel into products such as structural steel i beams angle stock channel stock bar stock and rails.