321 Piastra SS
321 stainless steel plate is a titanium-stabilized austenitic stainless steel designed for high-temperature and welded applications. Its excellent resistance to intergranular corrosion and strong thermal stability make it ideal for aerospace, lavorazione chimica, and industrial heat systems. Rispetto a 304 acciaio inossidabile, 321 provides superior performance in environments involving continuous heating and welding exposure.
- Descrizione
321 stainless steel plate is an austenitic chromium-nickel stainless steel stabilized with titanium. It is designed to provide excellent resistance to intergranular corrosion, especially in high-temperature service environments. Rispetto a 304 acciaio inossidabile, 321 offers better stability under heat exposure, making it widely used in aerospace, lavorazione chimica, and thermal equipment.
Composizione chimica di 321 Piastra in acciaio inossidabile
La caratteristica fondamentale di 321 stainless steel is the addition of titanium, which stabilizes carbon and prevents chromium carbide precipitation.
| Elemento | Contenuto (%) |
|---|---|
| Cromo (Cr) | 17.0–19.0 |
| Nichel (In) | 9.0–12.0 |
| Titanio (Di) | ≥ 5 ×C (typically 0.4–0.7) |
| Carbonio (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Silicio (E) | ≤ 1.00 |
| Fosforo (P) | ≤ 0.045 |
| Zolfo (S) | ≤ 0.03 |
| Ferro (Fe) | Bilancia |
Proprietà meccaniche di 321 Acciaio inossidabile
321 stainless steel maintains good strength and ductility across a wide temperature range.
| Proprietà | Valore tipico |
|---|---|
| Resistenza alla trazione | 515–750MPa |
| Forza di snervamento | ≥ 205 MPa |
| Allungamento | ≥ 40% |
| Durezza | ≤ 201 HB |
| Densità | 7.9 g/cm³ |
Principali caratteristiche prestazionali
1. Eccellente resistenza alle alte temperature
321 stainless steel performs well in continuous service up to around 800–900°C, making it suitable for heat-exposed environments.
2. Strong Resistance to Intergranular Corrosion
The titanium stabilization prevents carbide precipitation during heating, which significantly improves resistance to intergranular corrosion after welding or heat exposure.
3. Buona saldabilità
321 stainless steel can be welded using standard austenitic stainless steel methods without the need for post-weld heat treatment in most cases.
4. Good Mechanical Stability
It maintains stable mechanical properties in both low and high temperature environments, with good toughness and fatigue resistance.
Applicazioni comuni di 321 Piastra in acciaio inossidabile
321 stainless steel plate is widely used in high-temperature and welded structural applications.
Le applicazioni tipiche includono:
- Sistemi di scarico degli aerei
- Componenti del motore a reazione
- Scambiatori di calore
- Boiler equipment
- Componenti del forno
- Giunti di dilatazione
- Attrezzature per il trattamento chimico
- Recipienti a pressione
- Condutture ad alta temperatura
- Thermal insulation systems
321 Stainless Steel vs 304 Acciaio inossidabile
| Proprietà | 321 Acciaio inossidabile | 304 Acciaio inossidabile |
|---|---|---|
| Stabilizer | Titanio (Di) | Nessuno |
| Resistenza alle alte temperature | Meglio | Moderare |
| Resistenza alla corrosione intergranulare | Forte | Standard |
| Prestazioni di saldatura | Eccellente | Bene |
| Uso tipico | Heat-resistant systems | Uso generale |
