Hope you have a kiln....
Annealing:
Heat to 1650°F (900°C), hold 2 hrs., slow
cool no faster than 25°F (15°C) per hour to 1200°F
(650°C), then furnace cool or cool in still air to room
temperature. Crucible 154 CM can be cycle annealed by
heating to 1600°F (900°C). hold 2 hrs., cool to 1300°F
(704°C), hold 4 hrs., then air cool.
Annealed Hardness:
About BHN 235