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.
Aluminum sheet metal bend radius chart.
Per the aluminum association inc.
The minimum bend radius data shown in these charts is measured to the inside of the bend.
The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase.
The material thickness will be measured in decimal form not by the gauge number.
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 bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.
Table 1 preferred recommended 90 degree bend radii for various sheet metals.
Material bend radii and minimum bend size charts please note.
The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.
We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.
Radii for various thicknesses expressed in terms of thickness t.
Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.
It is possible to choose other bends if you require but additional lead time and tooling charges may apply.