such sheet for the middle section will improve the keg’s strength or make thinner walls possible at equal strength. This design may be preferred if weight reduction is a key criterion. Alternatively, stainless steel’s forming capacity allows two-piece designs (right-hand example), composed of two identical deep drawn halves. This design is

How to Form Copper Bowls From Sheet Metal by Hand. ... Advice on Dishing a Stump to achieve a wide variety of shapes in metal forming. (Prepare a stump for metal working) Most sheet metal shops would do the bend for you for a buck or two. That is the way I would go. What type material is it that you are bending? What gauge (thickness)? If it is steel, about a 22 gauge is the heaviest you will get a satisfactory bend by hand.