At elevated temperatures, dissimilar weld metal cracking is aggravated by the diffusion of
carbon out of the weld metal and into the base metal. The temperature at which carbon
diffusion becomes a concern is above ________.
Creep damage is found in high temperature equipment operating above the ________.
Fired heater tubes and components, Catalytic reactors, FCC reactors and FCC fractionator
and regenerator internals all operate in or near this.