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Given the complex and various environment where cutting tools are used these days, the improvement of machining properties and productivity of tools becomes more important, and this can be realized by improving the microstructural refinement, homogeneity, hardness, toughness, wear resistance feature.
Therefore, the industry is changed from an era of a traditional sub-grain precision tool to a new era of nano-grain precision tool.
The core technology of cutting tools is to increase the wear resistance and fracture toughness by making the WC particle size very fine and mixing the binder, Co evenly.
The nano tech material (sintered bulk) is the one made of the WC/Co composite powder using a new technology which ensures excellent hardness, toughness and wear resistance.

 
 
 
 
Grade NK6 NK8 NK9
ISO-Range K5 K10 K10-20
Diameter mm 1.0~32.0 1.0~32.0 1.0~32.0
Chemical
Data
Co wt% 6 8 9
WC+ Dopant wt% 94 92 91
Physical
Data
Density g/㎤ 14.65 14.45 14.35
HV30 kg/㎟ 2080 1980 1930
HRA ISO3738 94.7 94.2 94.0
TRS N/㎟ *4300 *4500 3800
Metallo-graphic Data A <10㎛ ≤02 ≤02 ≤02
B >10㎛ 00 00 00
C F.C 00 00 00
WC size 0.2 0.2 0.2
Applications Areas Hardened
steels
Stainless
Steels
Drilling
Applications
Aluminum
alloys,
Plastic, Gray
Cast iron
Products Micro-drill
Router
Micro-drill
Endmill, Drill
Grade NK10 NK12  
ISO-Range K10-2 K20-30  
Diameter mm 1.0~32.0 1.0~32.0  
Chemical
Data
Co wt% 10 12  
WC+ Dopant wt% 90 88  
Physical
Data
Density g/㎤ 14.25 14.05  
HV30 kg/㎟ 1880 1780  
HRA ISO3738 93.7 93.2  
TRS N/㎟ 3900 4100  
Metallo-graphic Data A <10㎛ ≤02 ≤02  
B >10㎛ 00 00  
C F.C 00 00  
WC size 0.2 0.2  
Applications Areas Corrosion and heat resistant
alloys, Stainless steels, Nonferrous metals, Titanium alloys
 
Plastics,
Titanium
alloys
Gray cast
iron
 
Products Endmill
Reamer
Endmill  
 
TRS test specimen : 8.0×4.0×24mm (W×H×L), span 20mm
* Ground cylindrical shape φ3.25×38mm, span 30mm
※ Other grades and dimensions are available on request.