Tool Or Crucible Steel

: The Working Of Steel

Crucible steel can be annealed either in muffled furnace or by

being packed. Packing is by far the most satisfactory method as it

prevents scaling, local hard spots, uneven annealing, or violent

changes in shape. It should be brought up slowly to just above

its calescent or hardening temperature. The operator must know

before setting his heats the temperature at which the different

carbon content steels are hardened. The higher the carbon contents

the lower is the hardening heat, but this should in no case be

less than 1,450 deg.F.