- Descrizione
17-7Lamiera in acciaio inox PH is a precipitation-hardening (PH) stainless steel known for its alta resistenza, buona resistenza alla corrosione, and excellent fatigue performance. È ampiamente utilizzato nel settore aerospaziale, molle, componenti di precisione, and high-stress engineering applications.
Composizione chimica dell'acciaio inossidabile 17-7PH
17-7PH is an austenitic–martensitic precipitation-hardening stainless steel.
Intervallo di composizione tipica
| Elemento | Contenuto (%) | Funzione |
|---|---|---|
| Cromo (Cr) | 16–18% | Resistenza alla corrosione |
| Nichel (In) | 6–8% | Stabilizes structure |
| Alluminio (Al) | 0.75–1.5% | Precipitation hardening |
| Carbonio (C) | ≤0.09% | Controls hardness |
| Manganese (Mn) | ≤1.0% | Improves toughness |
| Silicio (E) | ≤1.0% | Strength and oxidation resistance |
Key Performance Characteristics of 17-7PH
1. High Strength After Heat Treatment
17-7PH achieves very high strength through precipitation hardening.
- Solution treated state: moderate strength
- Condition CH900: very high tensile strength
2. Buona resistenza alla corrosione
- Paragonabile a 304 acciaio inossidabile in molti ambienti
- Suitable for mild atmospheric and industrial conditions
3. Eccellente resistenza alla fatica
- Ideal for cyclic loading applications
- Used in springs and flexible components
4. Buona formabilità allo stato ricotto
- Can be formed before final heat treatment
- Hardened afterward for final performance
Heat Treatment Behavior
17-7PH stainless steel gains properties through controlled heat treatment:
- Trattamento risolutivo
- Conditioning (A or C condition)
- Precipitation hardening (aging)
This process allows adjustment of:
- Forza
- Durezza
- Elastic performance
17-7PH vs 15-7PH Stainless Steel
17-7PH and 15-7PH are both precipitation-hardening stainless steels, but they differ in composition and performance balance.
Differenze chiave
| Proprietà | 17-7PH | 15-7PH |
|---|---|---|
| Contenuto di cromo | Più alto (16–18%) | Inferiore (14–15%) |
| Nickel content | Più alto | Inferiore |
| Strength potential | Molto alto | Alto |
| Resistenza alla corrosione | Meglio | Leggermente più basso |
| Robustezza | Bene | Moderare |
| Resistenza alla fatica | Eccellente | Bene |
Performance Comparison Summary
17-7PH Advantages
- Better corrosion resistance
- Higher fatigue strength
- More stable performance under cyclic stress
- Better for aerospace-grade applications
15-7PH Advantages
- Slightly easier to process
- Good balance of strength and cost efficiency
- Suitable for general industrial use
Applicazioni tipiche
17-7PH Stainless Steel Sheet
- Componenti aerospaziali
- High-performance springs
- Diaphragms and bellows
- Particolari meccanici di precisione
- High-stress structural elements
15-7PH Stainless Steel Sheet
- Industrial springs
- Fasteners and clips
- Componenti di ingegneria generale
- Medium-stress structural parts
