... Dec 1969, p 161 9-1 623 61. H.J. Kerr and F. Eberle, Graphitization of Low-Carbon and Low-Carbon-Molybdenum Steels, Trans. 25, 000 h at 25 °C ( 75 °F) and 230 °C ( 450 °F). Room-temperature aging ... coupled with energy-dispersive x-ray analysis, has provided direct proof of chromium depletion due to carbide precipitation at the grain boundaries (Ref 153 , 154 , 155 , 156 , 157 , 158 , 159 ). These studies ... 164 3-1 651 129. N. Bandyopadhyay and C.J. McMahon, Jr., The Micro-Mechanisms of Tempered Martensite Embrittlement in 4340-Type Steels, Metall. Trans. A, Vol 14A, July 1983, p 131 3-1 3 25 130....