Mild Steel Sheet

Metal Sheets Ltd are suppliers of popular sizes and thickness’ of Mild Steel Sheet Metal.  We cut any size you require up to the full sheet size. We also fabricate and weld.

Product Finish Thickness mm Sheet Size mm
Plain Sheet Bright (CR) Cold Rolled 1.0, 2.0, 3.0 2000 x 1000
Plain Sheet Black (HR) Hot Rolled 1.5, 2.0, 3.0 2000 x 1000, 2500 x 1250
Plain Sheet Corten (S355W) 1.0 2500 x 1250

Mild steel sheet is used extensively in the manufacture of motor vehicles, white goods, construction products and general metal fabrication. Mild steel sheet is an economical material but it does normally require a protective and decorative finish to add appeal and prevent corrosion. Mild steel sheet can be finished by many methods.

  • Mild Steel sheet can be painted, there are hundreds of specifications covering this process and materials. There are two main systems which are liquid and powder coating.
  • Mild steel sheet can be plastic coated with nylon, polythene and pvc for example.
  • Mild steel sheet can be galvanised, this process involves alloying the top surfaces of the steel sheet with molten zinc.
  • Mild steel sheet can also be electroplated with chrome, nickel, cadmium and tin for example.

Mild steel sheet can typically be joined with mechanical fixings or welded by methods including spot welding, arc welding. mig welding, silver soldering.

Mild steel sheet is manufactured generally in two grades, cold rolled and hot rolled.

  • Hot rolled mild steel sheet is the initial product produced by the steel mill as a downstream process prior to further processing such as cold rolling.
  • Hot rolled mild steel sheet has a mill scale which is usually black in colour. Hence the common name Black Mild Steel Sheet.
  • Black mild steel sheet is commonly used in fabrication shops, it is more economical than cold rolled mild steel sheet.
  • Black mild steel sheet will usually require more preparation work prior to any finishing system being applied.
  • Hot rolled mild steel sheet is designated by the prefix “HR”
  • Cold Rolled Steel Strip is produced, as the term suggests by the further rolling of strip produced by the hot strip mills.
  • Prior to cold rolling, the mill scale has to be removed, normally by the Pickling Process which uses mechanical manipulation (around small diameter rolls) and acid to dissolve the surface scale. The surface is then washed to remove the acid and a light oil added to prevent rusting.

Cold rolling is done to:

  • Reduce the thickness
  • Improve the surface finish
  • Improve the thickness tolerances
  • To offer a range of “tempers”
  • As a preparation for surface coating

Cold Rolled Mild Steel Sheet has a bright finish and is designated by the prefix “CR”