Purchased from Neil Lipson through eBay. This bolt was said to have been from a high-temperature pressure vessel of some sort.
Analysis by x-ray fluorescence spectroscopy at the Center for Microanalysis of Materials, University of Illinois (partially supported by the U.S. Department of Energy under grant DEFG02-91-ER45439) indicates that this bolt is approximately 92% molybdenum with the remainder a mixture of cobalt and chromium.
Source: Neil Lipson
Contributor: Theodore Gray
Acquired: 25 April, 2009
Text Updated: 25 April, 2009