Aluminum Sheet Flatness Tolerance

In general sheets 60 wide and under are to be no more than out of flat when laid on a flat surface.

Aluminum sheet flatness tolerance. Sheet metal guage tolerances. For material longer than 10 the variation in flatness for any 10 feet of length should not exceed the amount shown. Specified width ft. Aluminum technical data sheet and plate lateral bow and squareness tolerances lateral bow tolerances flat sheet and plate 1 also applicable to any 240 inch increment of longer sheet or plate squareness tolerances flat sheet and plate specified length ft.

Aluminum sheet thickness tolerances 1100 3003 5052 6061 2024 7075 1100 3003 5052 6061 2024 7075. According to en 485 4 2000 alloy group 1. This alloy plate has a standard aluminum association tolerance of 1 for a thickness range from 0 25 to 0 624 and a tolerance of 075 for a thickness range of 0 625 to 8. Plates can be out of flat for a number of reasons.

During the rolling process the rollers bow slightly which results in the sheets being thinner on the edges. The flatness tolerance for k100 s material between 250 and 500 thickness is within 015 while the flatness tolerance for material between 625 and 8 00 thickness is within 010. These flatness guarantees are both before and after machining. 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.

When measuring flatness on your own there are simple techniques you can use. 2011 t3 2024 t4 6061 t6 t651 cold finish. Flatness tolerances for sheet are published only for full size sheets. Since rolled alloys also levels this product we work to the mill tolerances.

For material 10 or less in length variation should not exceed amount shown in table. 0 125 to 0 374 0 0015 aluminum. When the longer dimension is from 36 to 72 the flatness variation should not exceed 75 of the amount shown for the specified width but in no case less than 1 4. Up thru 3 over 3.

En aw 1050a en aw 3003 en aw 5005. For example let s say you have 6061 t651 aluminum plate that must be produced at a certain flatness tolerance. K100 s uses the k100 s plate is ideal for machine work requiring vacuum integrity.