Things to know
about carbides

AF K20CF

K20CF is a submicron grade with 8% Co. It is characterized by a high wear resistance.
Application fields are the machining of cast iron, non-alloy and hardened steels, aluminum alloys, non-ferrous metals, composites (CFRP and GFRP) plastics.

Well suited for diamond coating.
ISO-Range K10 - K20
Chemical Data  
Co (%) 8
WC incl. Doping (%) 92
Physical Data  
Density (g/cm³) 14,6
Hardness  
HV 30 (N/mm²) 1710
HRA 92,5
Transverse Rupture Strength  
(N/mm²) > 4000
(1000 psi) > 580
KIc* (Shetty)
(MNm-3/2)   9,5
Metallogaphic Data  
Porosity  
A < 10 µm ≤ 02
B > 10 - 25 µm 00
C 00
Microstructure  
Tungsten Carbide α Ø 0,6 µm
Binding Phase β unif. distr.
Mixed Carbide γ -
Eta Phase η -
* Since stated values for the KIc depend on specimen geometry and preparation, a direct comparison with values determined by using a differing method is not permitted.