Bronze is a metal obtained by combining Copper and Tin. Both ores must be crushed or in Dust form, and mixed in a crafting grid in proportion 3:1. The resulting Bronze Dust can be smelted into Bronze Ingots in an Electro Furnace.
No, that isn't some casual Bronze which was already known thousands of years ago. This is really Special Bronze!
The special ability of Bronze, compared with common Iron, is it advanced durability. Each item you craft of Bronze, will not only look far more awesome, but will as well hold about 30% longer. And in effect, the tools are nearly as effective as iron tools, too! And who does seriously care about a slight lack in efficiency, if you can get whooping 30% more durability? HAYO!
As well, Bronze is PERFECT to craft advanced engineer tools. Like Wrenches. It is also perfect to use in place of iron to make rails. HAYO!