Minimum Bend Radius Mild Steel Sheet

Note that this is just a rule of thumb.

Minimum bend radius mild steel sheet.

When designing sheet metal parts and enclosures it is helpful to use these values as the basis for your design. In steel between 0 5 and 0 8 in. Now multiply that answer by the plate thickness. Steve benson the president of asma llc shares a handy rule of thumb for determining the minimum bend radius for steel forms.

An air bend force chart or force chart breaks down a number of key components of sheet metal bending in an easy to reference format. Bend radii minimum bend sizes. 4 0 5 2. Let s say i have a 2 mm thick sheet and i want to bend it.

The required die width is 12 mm and tonnage per meter is 22. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Discover all our calculation tools in the calculators section of the top menu. Bend radii and minimum bends are limited to certain values or ranges which are determined by the equipment and tooling combinations available to the manufacturer.

In steel between 0 5 and 0 8 in. This value will vary by grade. So in this case the minimum inside bend radius is 2 times the material thickness. 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.

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. The minimum inside bend radius is even larger when bending with the grain. The lowest common bench capacity is around 100 tonnes. The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force.

To keep it simple i also use a 2 mm inside radius. Divide 50 by the material s tensile reduction percentage as specified by your supplier. Bend radii minimum bend sizes. The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels.

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. If the material is 0 5 in. Again the minimum inside bend radius is even larger when bending with the grain. Use this document to choose values that are both manufacturable and meet your needs.

Determining the minimum internal radius for a bend in sheet metal. 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. The minimum bend radius data shown in these charts is measured to the inside of the bend. 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.