Hot Rolled Sheet Metal Thickness Tolerance

Permitted variations in thickness of hot rolled mill plate quarto plate a b specified thickness t in.

Hot rolled sheet metal thickness tolerance. Both types of steel sheet have tolerance ranges. The following charts give typical astm and ansi steel sheet mechanical tolerance ranges. The metal is rolled to the thickness of 0 5 3 mm in case of mild steel and 0 5 5 mm in case of stainless steel. Of irregular shape the over thickness tolerances apply to the greatest width corresponding to the width ranges shown.

Gague are used to specify the thickness of a metal sheet. As the metal sheet gets thinner between the rolls its speed increases. However the range of tolerance on hot rolled sheet is much wider than the range found on cold rolled sheet. Mm t 3 16 1 40 3 16 1 40 t 3 8 9 52 3 8 9 52 t 19 05 19 05 t 1 25 40.

Sheet metal guage tolerances during the rolling process the rollers bow slightly which results in the sheets being thinner on the edges. Hr hot rolled cr cold rolled sheet metal gage guage size chart carbon steel sheets. The material is cooled by the use of oil which also acts as a lubricant during the rolling process. Astm ansi mechanical steel sheet mechanical tolerances.

Over 0 3125 to 0 4375 incl. The tolerances in the table and attachments reflect current manufacturing practices and commercial standards and are not representative of the manufacturer s standard gauge which has no inherent tolerances. Up to 0 3125 incl. The sheet metal does however have a tolerance on the rolling thickness which needs to be taken into account when designing a tight fitting assembly especially as the sheet metal material gets thicker.

We work with nominal thicknesses so it s important to know the thickness tolerance on the material you chose in order to know if the final product will be suitable for your application. Standard tolerances for cold rolled steel usually choosing material thickness is one of the first steps a designer takes when starting a project.