Another real common application of brazing is the buildup of broken cast iron parts that will need to be machined afterwards. You can fix some huge damage that way and the finished part will behave much like the original casting as there is little to no embrittlement at brazing temperatures. You do have to preheat the part and allow to cool slowly, but after you can machine the bronze and cast iron back to finished size and there is no hardened area near the repair line, like there is when welded. You can typically replace any features like threads, holes, and bearing bores, that may have been damaged. It's done all the time to fix spun bearings in cast iron parts. Bore out the damage, braze it up, then re-bore for the original bearing size.