Sheet Metal Thickness Tolerance Standard

Sheet metal is one of the fundamental forms used in metalworking and it can be cut and bent into a variety of shapes countless everyday objects are fabricated from sheet metal. The resulting bend angle variation and sometimes the required adjustment to the flat layout contributes to the reason that machined parts typical tolerance of 0 002 in can routinely have tighter tolerances than precision sheet metal parts typical tolerance of 0 010 in. Widths over 2 ft thru 4 ft tx51 tempers 2 tx51 tempers 2 specified thickness in.

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As the gauge number increases the material thickness decreases.

Sheet metal thickness tolerance standard.

Astm a480hot rolled sheet coil thickness tolerance. 4 20 2009 11 06 07 am. Stock is made of layers of material bonded with adhesive. Hr hot rolled cr cold rolled sheet metal gage guage size chart carbon steel sheets.

316 stainless steel sheets with openings body and fender sheet metal tools expanded metal sheet stock magnetic sheet. Astm a240 a480 steel sheet sthickness tolerance. 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. Extremely thin sheets are considered foil or leaf and pieces thicker than 6 mm 0 25 in are considered.

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. Allowable deviation from flat. Thicknesses can vary significantly. Sheet metal is metal formed by an industrial process into thin flat pieces.

A sheet metal gauge sometimes spelled gage indicates the standard thickness of sheet metal for a specific material. Sheet metal thickness gauges for steel are based on a weight of 41 82 pounds per square foot per inch of thickness. Deviation allowed for the specified width. 2 also applicable to overall length of width of sheet if only one longitudinal and or transverse buckle or edge wave is present.

Thickness 36 48 60 title. Remove layers with a utility knife until you get the thickness you need. The following charts give typical astm and ansi steel sheet mechanical tolerance ranges. Sheet metal guage tolerances.

During the rolling process the rollers bow slightly which results in the sheets being thinner on the edges. Aluminum sheet thickness tolerances xls author. Sheet metal is manufactured and delivered from the processing mill rolled to the standard thickness that you specify which is now metric. 4 2242 2332 2152.

This material is precision ground to offer tighter tolerances than standard 316.