Things to know
about carbides

AF K34SF

AF K34SF is an ultra-fine grade with 9% Co. It is characterized by a very high hardness.
Applications are the processing of materials in the hardness range > 60 HRC. Very suitable for machining of abrasive materials (CFRP and GFRP).

Well suited for diamond coating.
ISO-Range K10 - K30
Chemical Data  
Co (%) 9
WC incl. Doping (%) 91
Physical Data  
Density (g/cm³) 14,3
Hardness  
HV 30 (N/mm²) 2000
HRA 94,4
Transverse Rupture Strength  
(N/mm²) > 3900
(1000 psi) > 566
KIc* (Shetty)
(MNm-3/2)   8,5
Metallogaphic Data  
Porosity  
A < 10 µm ≤ 02
B > 10 - 25 µm 00
C 00
Microstructure  
Tungsten Carbide α Ø < 0,5µm
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.