Things to know
about carbides

AF K44EF

AF K44EF is an ultra-fine grade with 12% Co. It is characterized by both high hardness and high flexural strength.
Application areas are HSC machining and dry machining, chipping of very hard materials (up to 60 HRC), in the processing of corrosion and heat resistant steels, nickel based alloys, titanium alloys, non-ferrous metals.

Not suitable for diamond coating.
ISO-Range K40 - K50
Chemical Data  
Co (%) 12
WC incl. Doping (%) 88
Physical Data  
Deosity (g/cm³) 14,1
Hardness  
HV 30 (N/mm²) 1680
HRA 92,3
Transverse Rupture Strength  
(N/mm²) > 4400
(1000 psi) > 638
KIc* (Shetty)
(MNm-3/2)   10,0
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.