Bend Radius For Steel Sheet

The bending angle is 90 sheet thickness 5 mm and the inside radius is 6 mm.

Bend radius for steel sheet. When we calculate the bend allowance we find that it equals 457. But for harder materials e g. The minimum inside bend radius is even larger when bending with the grain. Choose a bend radius that matches your minimum bend.

Recommended inside bend radius for sheet metal parts should be equal to material thickness. Bend radii minimum bend sizes. 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. In general mild steel and type 304 stainless sheet can be formed with sharp bends 1t without concern up to 1 8 thick.

Generally speaking the thicker a piece of sheet metal is the wider the internal bend radius will have to be. The hardness of the metal. 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. Sharp inside bend radius in sheetmetal parts can cause material flow problems in soft material and fracturing in hard material.

1 steels with lower carbon content are easier to weld and form. Another way to determine the k factor is by following the rule of thumb. Minimum bend includes minimum closeness of cutout to bend radius cold rolled steel 14 gauge 0 075 1 91mm. A cutout or the edge of your flange to your bend.

10 carbon content may be bent back on itself in any direction without cracking. The thickness of the metal. Grain direction is formed in metal in the direction in which the sheet was rolled at the steel mill. We want to know the final length of the detail.

Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. First we must start with the k factor. 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. Determine your minimum bend by measuring the distance from your closest feature i e.

Preferred recommended 90 degree bend radii for various sheet metals. 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.