Use our aluminum bending calculator to estimate radii and deformation. Flat Plates Stress, Deflection Equations and Calculators: The follow web pages contain engineering design calculators that will determine the amount of deflection and stress a flat plate of known thickness will deflect under the specified load and distribution. Many of the stress and deflection. Mini Sheet Metal Brake: The maximum bending width of the box and pan brake is 36 inches (910 millimeters). 31-inch thick blade and reinforced rib design, this product achieves excellent bending results, effortlessly handling 20-gauge low-carbon steel and 14-gauge aluminum bending. Guaranteed Find a lower price on an exact item? We'll match it. Eligibility rules. 5052-H32 (The Industry Standard): This magnesium-alloyed aluminum is the gold standard for sheet metal bending.