From a small company called Old World Collectibles and Creations comes the ultimate in recycled brass.  A chess set made entirely of used .223 brass.  Using both brass and steel cases, it creates a visually striking juxtaposition between the different cases.  From their site, the chessboard with it is available in either wood or a steel version.  For more, see their website at http://www.oldeworldcollectibles.com/