Duplex stainless steel combines high strength with excellent corrosion resistance. 2205 offers great value for general industrial use, while 2507 super duplex is designed for extreme corrosion and high-pressure conditions, making it ideal for marine, chemical, and energy industries. Whether for performance or cost-efficiency, duplex stainless steel is a dependable choice.
Duplex Stainless Steel has become a star material across industries thanks to its unique dual-phase microstructure that combines high strength with excellent corrosion resistance. Among its grades, 2205 Duplex and 2507 Super Duplex are particularly notable for their outstanding performance in various challenging environments.
Duplex stainless steel contains roughly equal proportions of austenitic and ferritic phases, offering twice the yield strength of conventional stainless steels like 304 or 316, while maintaining good ductility and excellent resistance to various types of corrosion.
Features and Applications of 2205 Duplex
2205 Composition and Properties
- Approximately 22% Chromium
- 5-6% Nickel
- Around 3% Molybdenum
- Yield strength about twice that of 304/316
- PREN value: 30-38 for excellent pitting resistance
Typical Applications of 2205
- Chemical processing equipment
- Petrochemical pipelines
- Pulp and paper industry
- Pressure vessels
2205 duplex stainless steel is the preferred choice for many medium to high corrosion environments due to its excellent performance-to-cost ratio.
2507 Composition and Properties
- 24-26% Chromium
- 6-8% Nickel
- 3-5% Molybdenum
- Higher nitrogen content for enhanced corrosion resistance
- Yield strength ≥ 550 MPa
- PREN ≥ 40, offering superior pitting and crevice corrosion resistance
Typical Applications of 2507
- Offshore oil & gas platforms
- Subsea pipelines
- Seawater desalination systems
- High-salinity chemical equipment
2507 super duplex stainless steel excels in extreme environments, combining superior strength and exceptional corrosion resistance, making it the preferred material for critical applications.
2205 vs. 2507 Duplex Stainless Steel
| Feature |
2205 Duplex |
2507 Super Duplex |
| PREN |
30-38 |
≥40 |
| Yield Strength |
≥450 MPa |
≥550 MPa |
| Cost |
Medium |
Higher |
| Suitable Environments |
Medium to high corrosion |
Extreme corrosion, high chlorides |
Whether your priority is performance or cost-efficiency, duplex stainless steels provide reliable, high-performance solutions for demanding projects.
Why Choose Duplex Stainless Steel?
- Higher strength → reduced wall thickness and lower costs
- Excellent corrosion resistance → extended equipment life
- Perfect for harsh environments
- Cost-effective alternative to nickel alloys
If you’re looking for a material that offers both strength and superior corrosion resistance, duplex stainless steel is an exceptional choice.
