c-2900-26

A
GENERAL TURNING
Grade descriptions
Grades for general turning
Cast iron, chilled cast iron, short chipping malleable iron.
ENG
B
Basic grades
Complementary grades
GC3210 (HC) – K10 (K01-K20)
A CVD coated cemented carbide grade. To be used in good to average machining
conditions in all cast iron materials. A grade suitable for continuous to interrupted
cut.
H13A (HW) – K20 (K10-K30)
Uncoated carbide grade. For moderate to low speeds and high feeds in cast iron.
C
GC3225 (HC) – K25 (K15-K35)
A CVD coated cemented carbide grade. To be used in average to difficult machining
conditions in all cast iron materials. A grade suitable for light to heavy interupted
cuts.
CB7525 (BN) - K05 (K01-K10)
A Cubic boron nitride grade. For high speed finishing of grey cast iron under
continuous as well as interrupted conditions.
D
CC6190 (CN) – K10 (K05 – K15)
Pure silicon nitride based ceramic. To be used in high speed roughing to finishing of
cast irons under good conditions. Is able to handle some interruptions.
CC650 (CM) – K01 (K01-K05)
Mixed Al 2O 3-based ceramic. Recommended for high speed finishing of grey cast irons
and hardened cast irons under stable conditions.
E
CB7925 (BN) - K05 (K01-K10)
A cubic boron nitride grade. Suited for both machining in grey cast iron and chilled
iron under continuous as well as interrupted conditions.
F
G
Letter symbols specifying the designation of
hard cutting materials:
Ceramics:
CA Oxide ceramics containing primarily
aluminium oxide (Al 2O 3).
Diamond:
DP Polycrystalline diamond 1)
H
Hardmetals:
HW Uncoated hardmetal containing primarily
tungsten carbide (WC)
HT
Uncoated hardmetal, also called cermet,
containing primarily titanium carbides (TIC)
or titanium nitrides (TIN) or both
CM
CN
Mixed ceramics containing primarily
aluminium oxide (Al 2O 3) but containing
components other than oxides.
Nitride ceramics containing primarily
silicon nitride (Si 3N 4)
Boron nitride:
BN Polycrystalline boron nitride 1)
1) Polycrystalline diamond and polycrystalline
boron nitride are also named superhard cutting
materials.
CC
Ceramics as above, but coated.
HC
Hardmetals as above, but coated
GENERAL TURNING Grade descriptions
A 296