- Soft-annealing 850°C – 900°C for 3 hours, followed by slow
cooling at 10°C per hour down to 700°C, then air cooling.
- Stress relieving 600°C – 700°C for approx. 2 hours at temperature, slow cooling
down to 500°C.
- Hardening with preheating in two steps 450°C – 500°C and
850°C – 900°C, and austenitizing at 1100°C – 1190°C.
- Two tempering at 560°C are recommended (maintain at least one hour
each at temperature).
- Hardness range : 62-65 HRC.
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