Duplex stainless steel 2205 is a two-phase ferritic-austenitic stainless steel combining the corrosion resistance of austenitic grades with the strength and stress-corrosion cracking resistance of ferritic alloys. It is widely employed in offshore oil and gas infrastructure, chemical processing plants, and desalination systems where aggressive chloride environments and high pressures demand superior pitting and crevice corrosion resistance. Engineers select duplex 2205 over single-phase austenitic or ferritic stainless steels when both mechanical robustness and extended service life in seawater or acidic chloride solutions are critical cost drivers.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 35.00 | - | — | ||
Ultimate Tensile Strength(σUTS) | 730.0 | MPa | — | ||
Yield Strength (0.2% offset)(σy) | 500.0 | MPa | 20°C | ||
Young's Modulus(E) | 200.0 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 7.800 | kg/m³ | — |