- Penerangan
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 kekuatan tinggi, rintangan kakisan yang sangat baik, and good weldability, making duplex stainless steels widely used in marin, kimia, and oil & gas industries.
Compared with conventional stainless steels like 304 atau 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.
Gred Biasa
- 2205 (AS S32205 / S31803)
- 2304 (AS S32304)
Ciri-ciri
- Good balance of strength and corrosion resistance
- Widely used in general industrial applications
- Cost-effective compared to super duplex
2. Keluli Tahan Karat Super Dupleks
Super duplex grades contain higher levels of chromium, Molybdenum, dan nitrogen, offering superior performance.
Gred Biasa
- 2507 (AS S32750)
- AS S32760 (sifar 100 type)
Ciri-ciri
- 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.
Gred Biasa
- 2101 (AS S32101)
- LDX 2404 (UNS S82441)
Ciri-ciri
- Lower nickel content reduces cost
- Rintangan kakisan sederhana
- Suitable for structural and less aggressive environments
Duplex Stainless Steel Grades Overview Table
| kategori | Gred | UNS Number | Ciri-ciri Utama | Aplikasi Biasa |
|---|---|---|---|---|
| Dupleks Lean | 2101 | S32101 | Kos efektif, kekuatan sederhana | berstruktur, pembinaan |
| Dupleks Lean | 2304 | S32304 | Rintangan kakisan yang baik | Tangki simpanan, general use |
| Dupleks Standard | 2205 | S32205 / S31803 | Balanced performance | kimia, marin |
| Super Dupleks | 2507 | S32750 | Rintangan kakisan yang tinggi | Luar pesisir, seawater systems |
| Super Dupleks | S32760 | S32760 | Extreme durability | Minyak & gas, desalination |
Key Characteristics of Duplex Stainless Steel
- Kekuatan tinggi (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
Aplikasi Biasa
Duplex stainless steel sheets are widely used in:
Industri Minyak dan Gas
- Pipelines and pressure vessels
- Platform luar pesisir
Kejuruteraan Marin
- Ship components
- Seawater handling systems
Chemical Processing
- Tangki simpanan
- Penukar haba
Construction and Infrastructure
- Bridges and structural components
- Water treatment facilities
Teda Ganghua – Keupayaan Bekalan
Teda Ganghua supplies a wide range of duplex stainless steel sheets:
- Full grade coverage (lean, standard, super dupleks)
- Various thickness and size options
- Perkhidmatan pemotongan dan fabrikasi tersuai
- Strict quality inspection and export standards
Dengan keupayaan inventori dan pemprosesan yang kukuh, Teda Ganghua menyediakan reliable duplex stainless steel solutions for demanding industrial applications.
