Aluminum Sheet Bend Radius Chart

The bend allowance and bend deduction are two measures that relate the bent length of a piece of sheet metal to the flat length.

Aluminum sheet bend radius chart.

Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend. It is possible to choose other bends if you require but additional lead time and tooling charges may apply. 0 060 crs 2 000 2 000 r0 031 aluminum 90 deg. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.

The bend radius you select may not be available if the geometry of the part will not allow us to bend with the specific tooling required to achieve that radius. The minimum bend radius data shown in these charts is measured to the inside of the bend. Let s say i have a 2 mm thick sheet and i want to bend it. To use the tables below.

Table 1 preferred recommended 90 degree bend radii for various sheet metals. Refer to table s for your choice of material. To keep it simple i also use a 2 mm inside radius. Material bend radii and minimum bend size charts please note.

Divide 50 by the material s reduction percentage as specified by the material supplier subtract by 1 and then multiply by the plate thickness. Therefore the bend allowance added to the flange lengths is equal to the total flat. Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried. The inside radii are based off of a standard air bend force chart.

The bend allowance describes the length of the neutral axis between the bend lines or in other words the arc length of the bend. Aluminum minimum bend radii for 90 degree cold forming of sheet and plate. Since commercial sheet metal bending can be done with less concern for stresses caused during forming operation the radius can be near zero for thin sheet metal. You described a rough rule to find a steel s minimum bend radius.

Per the aluminum association inc. In a previous bending basics article you mention a material s tensile reduction percentage used for calculating the minimum inside bend radius of various metals. Radii for various thicknesses expressed in terms of thickness t. The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.

I can now see that the minimum flange length is 8 5 mm for such a bend so i have to keep it in mind when designing.