T1 HIGH-SPEED STEEL


 

HEAT TREATMENT
Soft annealing Cooling Annealed hardness in HB
770 - 840 Furnace 240 - 300
1st pre-heating 2nd and 3rd pre-heating Hardening
from
In Tempering Hardness after tempering 
HRC
up to approx.
400C in air circulating furnace
a) 850
b) 850 and 1050
1240C
to
1290C
a) hot bath 550C / air or 
b) oil
c) air
min. two times
550C - 570C
63 - 66