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Material List
KD40
JIS standard: VF-50
Features
Carbide grade used by many semiconductor manufacturers for leadframe stamping. High fracture strength and hardness is obtained using fine WC grains, and has excellent wear and chipping resistance.
This grade's impact resistance and fracture toughness is higher than KD30 due to higher Co content, however wear resistance is reduced by one rank.
Equipments using KD40
| Cutter machine | Press working machine |
Applications of KD40
| Die, Punch | Crushing punch, Engraving punch |
| Cutter, Guide, Conveyor rails, Chuck claw |
Parts manufactured with KD40
| Moter core | Chain |
| Lead frame, Terminal | Fastner |
| Razor |
Properties of KD40
| Abrasion resistance | Chipping resistance |
| Impact resistance |
Examples of solutions using KD40
Carbide products using KD40
Other characteristics
Physical Properties
| Our grades | Hardness (HRA) | Transverse rupture strength [GPa] | Co amount [％] |
|---|---|---|---|
| KD05 | 92.0 | 3.2 | 8 |
| KD10 | 91.0 | 3.4 | 10 |
| KD20 | 90.0 | 3.7 | 13 |
| KD30 | 89.0 | 3.7 | 16 |
| KD40 | 88.0 | 3.7 | 19 |
| KD50 | 84.5 | 3.0 | 28 |
| Reference: G3 | 90.0 | 2.7 | 8 |
| Reference: G2 | 91.0 | 2.5 | 6 |
Relation between wear-resistance and machining property for KD grade
Chipping-resistance characteristics
Comparison result of profile grinding test
Hardness and TRS
Fracture toughness value
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