JIS SKH59 AISI M42 SS 2617 High Speed Tool Steels with Milling Surface for Twist Drills , SGS BV
Descrition:
E M42 is a highly cobalt alloyed high speed steel to be used when the demand for hot hardness is of great importance. E M42 has a good machinability and a good wear-resistance.
Heat Treatment
- Soft annealing in a protective atmosphere at 850-900°C, for 3 hours, followed by slow cooling at 10 °C per hour down to 700 °C, then air cooling.
- Stress-relieving at 600 °C to 700 °C for approximately 2 hours, slow cooling down to 500 °C.
- Hardening with pre-heating in 2 steps at 450-500 °C and 850-900 °C and austenitising at a temperature suitable for chosen working hardness.
- 3 tempers at 560 °C are recommended (maintain at least 1 hour each at temperatue).
Applications:
Twist drills, Broaches, Milling cutters, Reamers, End mills, Bandsaws ect.
Specifications:
Chemical Composition
|
C |
Cr |
Mo |
W |
Co |
V |
|
1.08 |
3.8 |
9.4 |
1.5 |
8.0 |
1.2 |
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