Used parts

Just curious...I just changed the drive belt tensioner in my truck and wondering if that can be recycled or brought anywhere? I was also thinking about that a few weeks ago with the rotors from another car I did and a caliper from my motorcycle. I always recycle oil, filters, Alternators, starters and the obvious when possible. But, What do you do with parts like this?

 

Where I live, we have plenty of metal scrappers. Small amounts aren't worth the time for me to take it to the recycle center. I set anything metal out by the curb and it will disappear. Some of these people come around in the middle of the night when trash is set out for garbage pickup day.