Physical Metallurgy of Modern Creep-Resistant Steel for Steam Power Plants: Microstructure and Phase Transformations

Table 6

Typical heat treatments schedule for power plant steels where Y0336, Z1092, A, and B are names for some developed creep steels [6].

Steel	Y0336	Z1092	A	B
Normalization
Temperature, °C	1053	1048	1200	1180
Duration, hr	11.35	11.6	2	2
Cooling rate	AC	AC	AC	AC
Tempering
Temperature, °C	750	742	800	800
Duration, hr	12.67	12.5	4	4
Cooling rate	AC	AC	AC	AC
Annealing
Temperature, °C	—	—	740	740
Duration, hr	—	—	4	4
Cooling rate	—	—	AC	AC

AC: air cool.