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High Speed Steel HS.6-5-2-5
E M35 is a high speed cobalt steel offering good hot hardness. Its composition allows a good compromise between hardness and resilience. E M35 has good grinding ability
Soft annealing in a protected atmosphere at 850-900 ° C for 3 hours, followed by slow cooling in steps of 10 ° C per hour up to 700 ° C, then air cooling.
Stress relieving annealing from 600 ° C to 700 ° C Holding time approx. 2 hours, slow cooling to 500 ° C.
Quenching in a protected atmosphere with preheating in two stages at 450-500 ° C and 850-900 ° C and austenitization at a temperature chosen according to the hardness.
Two tempers at 560 ° C are recommended (maintain at least one hour each time).
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