Final answer:
The bend radius for aluminum, copper, stainless steel, and brass is typically based on the material's thickness, with common guidelines suggesting a minimum radius equal to the sheet thickness for most metals, although precise values require provided handouts.
Step-by-step explanation:
Filling out the thickness or bend radius for sheet metals such as aluminum, copper, stainless steel, and brass depends on the specific properties of each material and the minimum allowable bend radius, which is typically based on the material's thickness. When bending sheet metal, the radius of the bend must be sufficiently large to avoid cracking or weakening the metal. Factors influencing the bend radius include material thickness, tensile strength, and ductility. Unfortunately, without the provided thickness and minimum bend radii handouts, it's not possible to give an exact value for each metal.
As an example, a common rule of thumb is that the minimum bend radius for aluminum should be equal to the sheet thickness, for copper, it can be as small as the sheet thickness, while for stainless steel and brass, it's advised to use a bend radius that's at least equal to the material thickness. The specific values, however, would be determined by the handouts or standards provided for the task.