Lamiera duplex in acciaio inossidabile
- Descrizione
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 alta resistenza, eccellente resistenza alla corrosione, and good weldability, making duplex stainless steels widely used in marino, chimico, and oil & gas industries.
Compared with conventional stainless steels like 304 O 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.
Typical Grades
- 2205 (UNS S32205 / S31803)
- 2304 (UNS S32304)
Caratteristiche
- Good balance of strength and corrosion resistance
- Widely used in general industrial applications
- Cost-effective compared to super duplex
2. Acciaio inossidabile super duplex
Super duplex grades contain higher levels of chromium, molibdeno, e azoto, offering superior performance.
Typical Grades
- 2507 (USA S32750)
- Stati Uniti S32760 (Zeron 100 type)
Caratteristiche
- 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.
Typical Grades
- 2101 (USA S32101)
- LDX 2404 (UNS S82441)
Caratteristiche
- Lower nickel content reduces cost
- Resistenza alla corrosione moderata
- Suitable for structural and less aggressive environments
Duplex Stainless Steel Grades Overview Table
| Categoria | Grado | UNS Number | Caratteristiche principali | Applicazioni tipiche |
|---|---|---|---|---|
| Duplex snello | 2101 | S32101 | Conveniente, moderate strength | Strutturale, costruzione |
| Duplex snello | 2304 | S32304 | Buona resistenza alla corrosione | Serbatoi di stoccaggio, uso generale |
| Duplex standard | 2205 | S32205 / S31803 | Prestazioni equilibrate | Chimico, marino |
| Super duplex | 2507 | S32750 | Elevata resistenza alla corrosione | Al largo, seawater systems |
| Super duplex | S32760 | S32760 | Extreme durability | Olio & gas, desalination |
Key Characteristics of Duplex Stainless Steel
- Alta resistenza (about twice that of austenitic stainless steel)
- Excellent resistance to stress corrosion cracking
- Good pitting and crevice corrosion resistance
- Migliore conduttività termica rispetto ai gradi austenitici
- Good weldability with proper control
Applicazioni comuni
Duplex stainless steel sheets are widely used in:
Industria del petrolio e del gas
- Pipelines and pressure vessels
- Piattaforme offshore
Ingegneria marina
- Ship components
- Seawater handling systems
Chemical Processing
- Serbatoi di stoccaggio
- Scambiatori di calore
Construction and Infrastructure
- Bridges and structural components
- Water treatment facilities
Teda Ganghua – Capacità di fornitura
Teda Ganghua supplies a wide range of duplex stainless steel sheets:
- Full grade coverage (lean, standard, super duplex)
- Various thickness and size options
- Servizi di taglio e fabbricazione personalizzati
- Strict quality inspection and export standards
Con una forte capacità di inventario e di elaborazione, Teda Ganghua fornisce reliable duplex stainless steel solutions for demanding industrial applications.
