The metal bending process is a sheet metal fabrication process . When metal is bending, each material has a minimum angle it can be bent before fracturing. The flexibility and hardness of the metal influence the minimum bend angle. Exceeding the minimum bending capability leads to cracks and breakage. Below are details on approximate minimum inside bend angles for common metals, assuming proper radii: Mild Steel Mild steel is the most commonly bending metal, valued for its excellent formability and strength. The minimum bend angle for mild steel depends on its thickness and grade: - 16 gauge (.060"): minimum bend angle around 35 degrees - 14 gauge (.075"): minimum bend angle around 40 degrees - 12 gauge (.105"): minimum bend angle around 50 degrees - 3/16" (0.1875"): minimum bend angle around 60 degrees - 1/4" (0.25"): minimum bend angle around 70 degrees The minimum angle increases for thicker mild steel because more elongation and compression are
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