Bend Radius For Steel Sheet

Grain direction is formed in metal in the direction in which the sheet was rolled at the steel mill.

Bend radius for steel sheet.

In our example below a part with flange lengths of 2 and 3 with an inside radius of 250 at 90 will have leg lengths of 1 625 and 2 625 respectively. Minimum bend includes minimum closeness of cutout to bend radius cold rolled steel 14 gauge 0 075 1 91mm. When we calculate the bend allowance we find that it equals 457. Determine your minimum bend by measuring the distance from your closest feature i e.

First we must start with the k factor. Preferred recommended 90 degree bend radii for various sheet metals. The minimum inside bend radius is even larger when bending with the grain. 10 carbon content may be bent back on itself in any direction without cracking.

Choose a bend radius that matches your minimum bend. 1 steels with lower carbon content are easier to weld and form. The hardness of the metal. But for harder materials e g.

Bend radii minimum bend sizes. Recommended inside bend radius for sheet metal parts should be equal to material thickness. The thickness of the metal. 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.

Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. In general parts should be designed with a minimum 1t bend radius radius matching the sheet thickness for the simplest setup and to ensure we can form the intended geometry. In steel between 0 5 and 0 8 in. The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm.

We want to know the final length of the detail. Another way to determine the k factor is by following the rule of thumb. There are a two major factors that affect how tight you can make the internal radius of a bend in a piece of sheet metal. Sharp inside bend radius in sheetmetal parts can cause material flow problems in soft material and fracturing in hard material.

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. A cutout or the edge of your flange to your bend.