- 説明
Duplex stainless steel sheet is a type of stainless steel that combines austenitic and ferritic microstructures, typically in a 50/50 ratio. This dual-phase structure provides 高強度, 優れた耐食性, and good weldability, making duplex stainless steels widely used in 海洋, 化学薬品, and oil & gas industries.
Compared with conventional stainless steels like 304 または 316, duplex grades offer higher strength and better resistance to stress corrosion cracking.
Main Types of Duplex Stainless Steel Grades
Duplex stainless steels are generally classified into three main categories:
1. Standard Duplex Stainless Steel
These are the most commonly used duplex grades with balanced performance.
代表的なグレード
- 2205 (米国 S32205 / S31803)
- 2304 (米国 S32304)
特徴
- Good balance of strength and corrosion resistance
- Widely used in general industrial applications
- Cost-effective compared to super duplex
2. スーパー二相ステンレス鋼
Super duplex grades contain higher levels of chromium, モリブデン, そして窒素, offering superior performance.
代表的なグレード
- 2507 (米国 S32750)
- 米国 S32760 (ゼロ 100 type)
特徴
- Excellent resistance to pitting and crevice corrosion
- High strength in harsh environments
- Suitable for offshore and marine conditions
3. Lean Duplex Stainless Steel
Lean duplex grades have lower alloy content, providing a more economical option.
代表的なグレード
- 2101 (米国 S32101)
- LDX 2404 (UNS S82441)
特徴
- Lower nickel content reduces cost
- 中程度の耐食性
- Suitable for structural and less aggressive environments
Duplex Stainless Steel Grades Overview Table
| Category | 学年 | UNS番号 | 主な特長 | 代表的な用途 |
|---|---|---|---|---|
| リーンデュプレックス | 2101 | S32101 | 費用対効果の高い, 適度な強さ | Structural, 工事 |
| リーンデュプレックス | 2304 | S32304 | 優れた耐食性 | 貯蔵タンク, general use |
| 標準両面印刷 | 2205 | S32205 / S31803 | バランスの取れたパフォーマンス | 化学薬品, 海洋 |
| スーパーデュプレックス | 2507 | S32750 | 高い耐食性 | オフショア, seawater systems |
| スーパーデュプレックス | S32760 | S32760 | Extreme durability | 油 & ガス, desalination |
Key Characteristics of Duplex Stainless Steel
- 高強度 (about twice that of austenitic stainless steel)
- Excellent resistance to stress corrosion cracking
- Good pitting and crevice corrosion resistance
- Better thermal conductivity than austenitic grades
- Good weldability with proper control
一般的なアプリケーション
Duplex stainless steel sheets are widely used in:
石油およびガス産業
- Pipelines and pressure vessels
- オフショアプラットフォーム
海洋工学
- Ship components
- Seawater handling systems
Chemical Processing
- 貯蔵タンク
- 熱交換器
Construction and Infrastructure
- Bridges and structural components
- Water treatment facilities
泰達江華 – 供給能力
泰達江華 supplies a wide range of duplex stainless steel sheets:
- Full grade coverage (lean, 標準, スーパーデュプレックス)
- Various thickness and size options
- カスタム切断および製造サービス
- Strict quality inspection and export standards
強力な在庫と処理能力を備えています, 泰達江華が提供する reliable duplex stainless steel solutions for demanding industrial applications.
