ZAPP Z-420 PM
Z-420 PM® is a corrosion resistant, high vanadium tooling material produced by powder metallurgy methods. It is a martensitic stainless grade designed to also provide high wear resistance (similar to Z-9 PM) while maintaining good toughness (similar to Z-10 PM).
Chemical Composition
| NO | DIN | C | Cr | V | Mo |
|---|---|---|---|---|---|
| Z-420 PM | Special Alloy | 2,30 | 14,00 | 9,00 | 1,00 |
Applications
- Plastic injection and extrusion feedscrews
- Non-return valve components
- Palletizing equipment
- Injection molds and inserts
- Industrial knives, cutters and slitters
- Wear parts in food and chemical processing
- Gear pumps
Heat Treatment
| HEAT TREATMENT | TEMPERATURE |
|---|---|
| Annealing | Heat uniformly in a protective atmosphere (or vacuum) to 1650°F (890°C) and soak for 2 hours. Slow cool 30°F (15°C) per hour until 1000°F (540°C). |
| Stress relieving | Heat uniformly to 1100–1300°F (595–700°C) soak for 2 hours and cool in air or furnace. |
| Hardening | Vacuum, salt, or protective atmosphere methods are generally used. Care must be taken to prevent decarburization. |
| Tempering | Immediately temper after the material has cooled down below 40°C. CPM® 420 V® is normally tempered through two tempering stages, each of 2 hours duration at 200°C to 400°C. |
Corrosion Resistance
Delivery Conditions
277- 300 HB
| Required hardness HRC | Austenitizing soak temp. °C | Austenitizing soak time (min) | Tempering temperature °C |
|---|---|---|---|
| 56 | 1065 | 30 | 290 |
| 57 | 1120 | 25 | 40 |
| 58 | 1120 | 25 | 290 |
| 59 | 1175-1180 | 20 | 290 |
* Tempering temperatures from 400 ile 540℃ are not recommended.
