Iowaguy --You must be a Hawkeye?? A little sarcasm from South Dakota!
Aluminumphil --What about nickel plating(electrolytic or electroless)? Forget about wear, just consider environmental exposure consistent with industrial environments. How well will it protect the material? Comparing...
Nitinol is amazing stuff. Although, I haven't seen a good spec sheet on this stuff either. Seems to be proprietary?? Special Metals Corporation is a good resource.
I don't know your specifics and this is a pretty old thread, but I have to share this with everyone. Cogsdill makes a reamer called a Sheffcut Reamer. In brass, we are holding a bore within a .0005 (using less than 70% of the tolerance, using an air gage to scan the bore)total tolerance on a 3...