Thick grade 350 and 400 may have a minimum bend radius of 2 5 times the material thickness when transverse bending while longitudinal bending may require a minimum bend radius that s 3 75 times the material thickness see figure 1.
Minimum bend radius sheet metal steel.
These dimensions are all in relation to a 90 angle.
The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase.
Maximum sheet thickness for aluminum and stainless steel is 6 mm.
Brittle metal such as aluminum generally requires a larger bend radius than ductile material like cold rolled steel.
To keep it simple i also use a 2 mm inside radius.
Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.
If the product contains one or more sharp bends use the dimensions from the sharp tables for all bends in.
The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.
This tool allows you to determine tonnage internal radius v die opening and minimum flange you just have to insert the characteristics of the sheet metal to be bent.
Each and every bend in a piece of sheet metal has a certain minimum internal radius that needs to be taken into account when planning the design of a sheet metal form.
5052 h32 aluminum bends in about the same way as mild steel.
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.
3003 h14 is extremely ductile.
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Maximum dimensions are 2980 x 1200 mm.
Bend radii minimum bend sizes.
Maximum sheet thickness for all other steel is 6 mm.
The minimum inside bend radius is even larger when bending with the grain.
It requires an inside bend radius of at least 6x the material thickness.
Table 1 preferred recommended 90 degree bend radii for various sheet metals.
If a piece of material is bent too tightly problems can occur.
Let s say i have a 2 mm thick sheet and i want to bend it.
It is possible to choose other bends if you require but additional lead time and tooling charges may apply.
In steel between 0 5 and 0 8 in.
Maximum weight is 40 kg.
The problem with bending too tightly.
It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.
Use this document to choose values that are both manufacturable and meet your needs.
Aluminum where necessary 5052 h32 may be bent to 1t and 6061 t6 to 1 1 2t.
We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.
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.
For example 6061 t6 aluminum is very difficult to bend.
