- Penerangan
309 stainless steel plate is a high-alloy austenitic stainless steel designed for excellent heat resistance and oxidation resistance. Berbanding dengan 304 dan 308 gred, 309 mengandungi kandungan kromium dan nikel yang lebih tinggi, which significantly improves performance in high-temperature environments. It is widely used in furnace equipment, sistem pemprosesan haba, and heat-resistant structural components.
Komposisi Kimia bagi 309 Plat Keluli Tahan Karat
The high chromium and nickel content provides excellent thermal stability and oxidation resistance.
| unsur | kandungan (%) |
|---|---|
| Chromium (Cr) | 22.0–24.0 |
| Nikel (Dalam) | 12.0–15.0 |
| Karbon (C) | ≤ 0.20 |
| Mangan (Mn) | ≤ 2.00 |
| silikon (Dan) | ≤ 1.00 |
| Fosforus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Besi (Fe) | Keseimbangan |
Sifat Mekanikal bagi 309 Keluli Tahan Karat
309 stainless steel maintains stable strength and toughness even under elevated temperature conditions.
| Harta benda | Nilai Biasa |
|---|---|
| Kekuatan Tegangan | 520–750 MPa |
| Kekuatan Hasil | ≥ 205 MPa |
| Pemanjangan | ≥ 40% |
| Kekerasan | ≤ 217 HB |
| Ketumpatan | 7.9 g/cm³ |
Ciri Prestasi Utama
1. Rintangan Suhu Tinggi yang Cemerlang
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.
Ia digunakan secara meluas dalam:
- Bahagian relau
- Peralatan rawatan haba
- Saluran paip suhu tinggi
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. Ketahanan Kakisan yang Baik
Although mainly a heat-resistant grade, 309 also provides good resistance to:
- Mild acidic environments
- Atmospheric corrosion
- Industrial chemical exposure
Namun begitu, it is not designed for severe chloride-rich seawater conditions.
4. Excellent Weldability and Formability
309 stainless steel maintains good fabrication performance:
- Easy welding (TIG, SAYA, SMAW)
- Good bending ability
- Stable austenitic structure
- No hardening after cooling
Aplikasi Biasa bagi 309 Plat Keluli Tahan Karat
309 stainless steel plate is widely used in high-temperature and industrial furnace applications.
Aplikasi biasa termasuk:
- Furnace liners and furnace parts
- Peralatan rawatan haba
- Komponen dandang
- High-temperature duct systems
- Kiln and incinerator parts
- Heat exchangers in thermal systems
- Power plant equipment
- Industrial burners and combustion chambers
- Sambungan pengembangan
- High-temperature structural supports
309 Keluli Tahan Karat lwn 304 Keluli Tahan Karat
| Harta benda | 309 Keluli Tahan Karat | 304 Keluli Tahan Karat |
|---|---|---|
| Rintangan Haba | Sangat tinggi | Sederhana |
| Chromium Content | Lebih tinggi (22–24%) | Lebih rendah (18–20%) |
| Kandungan Nikel | Lebih tinggi | Standard |
| Rintangan Pengoksidaan | Cemerlang | bagus |
| Kegunaan Utama | High-temperature systems | Kegunaan industri am |
