M1 HIGH-SPEED STEEL


  

HEAT TREATMENT
  

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