Please help to understand. I create bell in my scene and apply bronze material to it, but on a render it looks like made from tin instead of thick cast metal.
I can assume that your bronze material has overly perfect look. Usually bronzeware is handmade, so realistic bell 3d model must have many imperfections such as dents from a hammer or green signs of oxidation. That means you need to add appropriate bump map and create oxidation zones on diffuse.