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Material List
EF20
JIS standard: VF-40
Features
This is an ultra-fine cemented carbide grade with WC particle size of less than 1μ, and with excellent chipping resistance. Its high hardness and transverse rupture strength provide excellent performance in applications where sharp edges are required.
This grade's impact resistance and fracture toughness is higher than EF10 due to higher Co content, however wear resistance is reduced by one rank.
Equipments using EF20
| Press working machine | Cutter machine |
| Injection moulding machine |
Applications of EF20
| Punch | Pot, Plunger |
| Seal (stake) | Lifter |
| Staking punch |
Parts manufactured with EF20
| Switch, Connector | Semiconductor |
| Blood Collection Tube, Needle | Coin Battery, Button Battery |
Properties of EF20
| Abrasion resistance | Sharp edge |
| High toughness |
Other characteristics
Physical Properties
| Our grades | Density [×10³ kg/m³] {g/cm³} | Hardness (HRA) | Hardness (HV) | Transverse rupture strength [GPa] |
|---|---|---|---|---|
| EF01 | 14.5 | 94.0 | 2000 | 3.7 |
| EF05 | 14.3 | 93.0 | 1900 | 3.7 |
| EF10 | 14.0 | 92.0 | 1750 | 4.0 |
| EF20 | 13.6 | 90.0 | 1480 | 4.0 |
*The values are representative and are not guaranteed.
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