Looking into welding a hollow steel d20 dice aka icosahedron.
There are three factors that are dependent on the final result:
- thickness of the steel sheet metal,
- length of the equilateral triangle, and
- diameter as twice the circumradius.
Looked at sheet metal thickness of 2-5 mm and triangle length of 75-200 mm where the end resulting weight is 0.78-13.9 kg without the reduction/addition of welding and using steel density of 0.008 g/mm^3. The diameter respected to the triangle length is 143-380 mm.
