HEAT TREATMENT
  
 

• Soft-annealing 850°C – 900°C, slow cooling 10°C/h to 700°C, hardness max
  260 HB.
   
• Stress-relieving annealing 600°C  – 700°C, approx. 2 hours at temperature, slow cooling to 500°C.
   
• Hardening according to table. 
   
• Tempering, 3x1 hour 560°C.