Flatness Tolerance Sheet Metal

Parts may be measured in either unrestrained or restrained conditions.

Flatness tolerance sheet metal.

For material longer than 10 the variation in flatness for any 10 feet of length should not exceed the amount shown. Plates can be out of flat for a number of reasons. Sheet metal guage tolerances. T351 t451 t651 t851 t7351 and t7651.

Flatness tolerances listed are of roller leveled sheets or plates with no or minimum margins. 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. In general sheets 60 wide and under are to be no more than out of flat when laid on a flat surface. Note any feature requirement comes with price tag on it.

4 for widths over 6 ft these tolerances alloy for any 6 ft of total width. Since rolled alloys also levels this product we work to the mill tolerances. 5 short span flatness is the deviation from flat over full span for spans 2 ft and less 2 tx51 is a general designation for the following stress relieved tempers. For material 10 or less in length variation should not exceed amount shown in table.

Flatness tolerance is the permissible distance between two parallel planes within which all irregularities of a given surface must lie. During the rolling process the rollers bow slightly which results in the sheets being thinner on the edges. Sheet metal is often controlled with flatness tolerance.