A steam turbine, a rotor and a method for making an extruded rotor are disclosed as having a rotor bore formed of an extruded high temperature alloy. The method includes providing a high temperature alloy, melting the high temperature alloy, extruding the high temperature alloy to form a bore, and forming the bore into a rotor.
STATEMENT OF FEDERALLY SPONSORED RESEARCH
 Portions of the invention disclosed herein were reduced to practice with the support of the U.S. Department of Energy, Contract No. DE-FE0000234. The U.S. Government may have certain rights in this invention.