Create Metal

Create Metal, a mod as a create add-on.
Add steel, bronze and tin for create.

Bronze

You can make Bronze ingot by heating and mixing a copper ingot and a tin ingot in a basin.

Steel

Put a iron block and a coal in the basin, then heat and mix them, you will get nine steel ingots.

Tin

You can find tin ores underground. In some recipes, it can replace iron.