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EW grade

  • Special Grade
  • EW10・EW25・EW40
High-hardness, High-toughness and Corrosion-resistant Cemented Carbide

Compared with the other grades with the same hardness, the resistance improvements against chipping and cracking will be expected even without reducing the hardness since fracture toughness is relatively high. Also, the corrosion-resistance is excellent.

Application
  • Wear-resistance parts with chipping and cracking possibilities.
  • Wear-resistance parts with electrical discharge machining applied.
  • Wear-resistance parts with long water wire electrical discharge machining applied.
EW grade

Physical Properties

Our grade Hardness 
(HRA)		 TRS 
[GPa]		 Fracture toughness value
[MPa・m1/2]		 Density 
[×103kg/m3](g/cm3)
EW10 91.0 3.5 15 14.8
EW25 89.5 3.5 22 14.3
EW40 88.0 3.5 29 13.9

Characteristics

Our grade Hardness 
(HRA)		 TRS 
[GPa]		 Fracture toughness value
[MPa・m1/2]		 Density 
[×103kg/m3](g/cm3)
EW25 89.5 3.5 22 14.3
KD20 90.0 3.7 16 14.2
WD20 90.5 3.7 16 14.1
MC20 90.0 2.8 19 14.9

Performance of corrosion-resistance

graph

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