- 説明
309 stainless steel plate is a high-alloy austenitic stainless steel designed for excellent heat resistance and oxidation resistance. と比較して 304 そして 308 成績, 309 クロムとニッケルの含有量が高い, which significantly improves performance in high-temperature environments. It is widely used in furnace equipment, 熱処理システム, and heat-resistant structural components.
の化学組成 309 ステンレス鋼板
The high chromium and nickel content provides excellent thermal stability and oxidation resistance.
| 要素 | コンテンツ (%) |
|---|---|
| クロム (Cr) | 22.0–24.0 |
| ニッケル (で) | 12.0–15.0 |
| 炭素 (C) | ≤ 0.20 |
| マンガン (ん) | ≤ 2.00 |
| シリコン (そして) | ≤ 1.00 |
| リン (P) | ≤ 0.045 |
| 硫黄 (S) | ≤ 0.03 |
| 鉄 (鉄) | バランス |
機械的性質 309 ステンレス鋼
309 stainless steel maintains stable strength and toughness even under elevated temperature conditions.
| 財産 | 代表値 |
|---|---|
| 抗張力 | 520–750MPa |
| 降伏強さ | ≥ 205 MPa |
| 伸長 | ≥ 40% |
| 硬度 | ≤ 217 HB |
| 密度 | 7.9 g/cm3 |
主な性能特徴
1. 優れた耐高温性
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.
広く使用されています:
- 炉部品
- Heat treatment equipment
- 高温パイプライン
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. 優れた耐食性
Although mainly a heat-resistant grade, 309 also provides good resistance to:
- Mild acidic environments
- Atmospheric corrosion
- Industrial chemical exposure
しかし, it is not designed for severe chloride-rich seawater conditions.
4. Excellent Weldability and Formability
309 stainless steel maintains good fabrication performance:
- Easy welding (ティグ, 自分, SMAW)
- Good bending ability
- Stable austenitic structure
- No hardening after cooling
一般的な用途 309 ステンレス鋼板
309 stainless steel plate is widely used in high-temperature and industrial furnace applications.
代表的なアプリケーションには次のものがあります。:
- Furnace liners and furnace parts
- Heat treatment equipment
- ボイラーコンポーネント
- High-temperature duct systems
- Kiln and incinerator parts
- Heat exchangers in thermal systems
- Power plant equipment
- Industrial burners and combustion chambers
- 伸縮継手
- High-temperature structural supports
309 ステンレス鋼 vs 304 ステンレス鋼
| 財産 | 309 ステンレス鋼 | 304 ステンレス鋼 |
|---|---|---|
| 耐熱性 | 非常に高い | 適度 |
| Chromium Content | より高い (22–24%) | より低い (18–20%) |
| ニッケル含有量 | より高い | 標準 |
| 耐酸化性 | 素晴らしい | 良い |
| 主な用途 | High-temperature systems | 一般産業用 |
