A36 Sheet Metal Bend Radius

For example using a steel plate an ibr recommendation of 1 5t would equal an inside bend radius of 3 8 250 x 1 5 375.

A36 sheet metal bend radius. 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. Specifically the perfect bend s radius ranges from the minimum radius value up to 125 percent of the material thickness. Plug the bend allowance ba the bend angle b inside radius ir and material thickness mt into the below equation to determine the k factor k. They are shown in relation to the material thickness.

In a previous bending basics article you mention a material s tensile reduction percentage used for calculating the minimum inside bend radius of various metals. It is possible to choose other bends if you require but additional lead time and tooling charges may apply. The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase. It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.

It also contains the use of astm a36 such as it is commonly used in bars sheet plates steel coils steel pipes forged and other materials application. The minimum bend radius data shown in these charts is measured to the inside of the bend. Table 1 preferred recommended 90 degree bend radii for various sheet metals. Divide 50 by the material s reduction percentage as specified by the material supplier subtract by 1 and then multiply by the plate thickness.

Bend radii minimum bend sizes. Recommended minimum bend radii for steel and aluminum. The same inside bend radius cannot be used for all steel grades. This page is mainly introduced the astm a36 datasheet including chemical information mechanical properties physical properties mechanical properties heat treatment and micro structure etc.

Specifing a bend radius from here will help prevent hair line cracks. We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts. The perfect bend has a radius that s equal or close to the material thickness. Use this document to choose values that are both manufacturable and meet your needs.

The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications. Try forming a radius smaller than the minimum and you crease the center of the radius giving you a sharp bend. There are inside bend radius recommendations listed for some of the steel grades that we stock. You described a rough rule to find a steel s minimum bend radius.

For our example it comes to. If your radius is 125.