- Beschreibung
309 stainless steel plate is a high-alloy austenitic stainless steel designed for excellent heat resistance and oxidation resistance. Gegenüber 304 Und 308 Noten, 309 enthält einen höheren Chrom- und Nickelgehalt, which significantly improves performance in high-temperature environments. It is widely used in furnace equipment, thermische Verarbeitungssysteme, and heat-resistant structural components.
Chemische Zusammensetzung von 309 Edelstahlplatte
The high chromium and nickel content provides excellent thermal stability and oxidation resistance.
| Element | Inhalt (%) |
|---|---|
| Chrom (Cr) | 22.0–24.0 |
| Nickel (In) | 12.0–15.0 |
| Kohlenstoff (C) | ≤ 0.20 |
| Mangan (Mn) | ≤ 2.00 |
| Silizium (Und) | ≤ 1.00 |
| Phosphor (P) | ≤ 0.045 |
| Schwefel (S) | ≤ 0.03 |
| Eisen (Fe) | Gleichgewicht |
Mechanische Eigenschaften von 309 Edelstahl
309 stainless steel maintains stable strength and toughness even under elevated temperature conditions.
| Eigentum | Typischer Wert |
|---|---|
| Zugfestigkeit | 520–750 MPa |
| Streckgrenze | ≥ 205 MPa |
| Verlängerung | ≥ 40% |
| Härte | ≤ 217 HB |
| Dichte | 7.9 g/cm³ |
Hauptleistungsmerkmale
1. Ausgezeichnete Hochtemperaturbeständigkeit
309 stainless steel is specifically designed for high-temperature service. It performs well in continuous exposure up to approximately 1000°C and intermittent exposure even higher.
Es ist weit verbreitet in:
- Ofenteile
- Heat treatment equipment
- Hochtemperatur-Pipelines
2. Strong Oxidation Resistance
The high chromium content forms a stable oxide layer that protects the material from scaling and oxidation in hot environments.
This makes it suitable for:
- Thermal cycling conditions
- Combustion systems
- Exhaust gas environments
3. Gute Korrosionsbeständigkeit
Although mainly a heat-resistant grade, 309 also provides good resistance to:
- Mild acidic environments
- Atmospheric corrosion
- Industrial chemical exposure
Jedoch, it is not designed for severe chloride-rich seawater conditions.
4. Excellent Weldability and Formability
309 stainless steel maintains good fabrication performance:
- Easy welding (WIG, MICH, SMAW)
- Good bending ability
- Stabile austenitische Struktur
- No hardening after cooling
Häufige Anwendungen von 309 Edelstahlplatte
309 stainless steel plate is widely used in high-temperature and industrial furnace applications.
Zu den typischen Anwendungen gehören::
- Furnace liners and furnace parts
- Heat treatment equipment
- Kesselkomponenten
- High-temperature duct systems
- Kiln and incinerator parts
- Heat exchangers in thermal systems
- Power plant equipment
- Industrial burners and combustion chambers
- Dehnungsfugen
- High-temperature structural supports
309 Edelstahl vs 304 Edelstahl
| Eigentum | 309 Edelstahl | 304 Edelstahl |
|---|---|---|
| Hitzebeständigkeit | Sehr hoch | Mäßig |
| Chromium Content | Höher (22–24 %) | Untere (18–20 %) |
| Nickelgehalt | Höher | Standard |
| Oxidationsbeständigkeit | Exzellent | Gut |
| Hauptverwendung | Hochtemperatursysteme | Allgemeine industrielle Verwendung |
