DESIGNATION
DIN: | HS 6-5-2 C |
AFNOR: | Z 85 WDCV 6 |
UNI: | X 82 WMoV 6 5 |
AISI: | M 2 reg. C |
CHEMICAL COMPOSITION:
C | 0.9 |
Si | 0.3 |
Mn | 0.3 |
Cr | 4.0 |
Mo | 5.0 |
V | 1.9 |
W | 6.2 |
STRENGTH:
max. 269 HB
(≈ max. 915 N/mm²)
THERMAL CONDUCTIVITY AT 100 °C:
27.4 W/m K
CHARACTER:
high-speed steel featuring high resistance to abrasion and wear in combination with high toughness and compressive strength. High heat resistance, therefore ideal for through hardening
APPLICATION:
blocks for eroding, cold forming tools such as cutting, fine blanking and impact extrusion punches and dies
inserts with a very high wear resistance
TREATMENT BY
is possible:
Polishing
highly suitable:
Nitriding, EDM, coating
HEAT TREATMENT:
Soft annealing:
820 to 850 °C for about 2 to 5 hours
slow controlled cooling of 10 to 20 °C per hour to about 550 °C;
further cooling in air. Maximum 270 HB
Hardening:
1190 - 1230 °C
Quenching in oil/compressed gas/air/hot bath
obtainable hardness: 66 HRC
Tempering:
slow heating to tempering temperature (to avoid forming of cracks)
immediately after hardening;
triple tempering is recommended
Annealing graph:
Technical tip
- excellent for PVD and CVD coating; highest dimensional stability because the steel was tempered at more than 520 °C.
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