Duplex Steel Plate
Duplex Steel Plate is a high-performance stainless steel product that combines the strength and hardness of ferritic steel with the corrosion resistance of austenitic steel. Known for its excellent mechanical properties and superior resistance to pitting, crevice corrosion, and stress corrosion cracking, duplex steel plates are ideal for demanding applications in the oil & gas, petrochemical, marine, and chemical processing industries. These plates are commonly manufactured in grades such as UNS S31803, S32205 (standard duplex), and UNS S32750, S32760 (super duplex), offering high strength-to-weight ratios and excellent weldability. Duplex steel plates also retain good toughness and ductility, even in sub-zero environments, making them suitable for structural and pressure vessel applications that require long-term durability and performance.
Duplex Steel Plate - Specifications
| Parameter | Description / Options |
|---|---|
| Material Grades | UNS S31803, UNS S32205, UNS S32750, UNS S32760 |
| Standards | ASTM A240, ASME SA240, EN 10088-4, ASTM A479 |
| Thickness Range | 3 mm to 100 mm (or as per requirement) |
| Width | Up to 2500 mm (or customized) |
| Length | Up to 12000 mm or custom cut-to-length |
| Finish | Hot Rolled, Cold Rolled, No.1, 2B, BA, Satin, Polished |
| Form | Plates, Sheets, Coils, Strips, Blanks |
| Edge Type | Mill Edge, Slit Edge |
| Heat Treatment | Solution Annealed (typically 1020–1100°C) |
| Testing | Ultrasonic Testing, PMI, Mechanical Testing, Intergranular Corrosion Test |
| Applications | Oil & Gas, Pressure Vessels, Marine, Chemical Plants, Desalination, Pulp & Paper |
Key Feature
| Key Feature | Description |
|---|---|
| Corrosion Resistance | Excellent resistance to stress corrosion cracking and pitting in chloride environments. |
| Strength | High strength, making it ideal for pressure vessel and high-stress applications. |
| Weldability | Good weldability but requires attention to heat control to avoid undesirable microstructure changes. |
| Toughness | Superior toughness at low temperatures, making it suitable for cryogenic applications. |
| Fatigue Resistance | Excellent resistance to cyclic loading and fatigue. |
| Ductility | Moderate ductility that allows for better forming and shaping compared to ferritic steels. |
| Versatility | Commonly used in the oil & gas, marine, and chemical industries. |