Description
The Duplex Difference
Why 2205 Outperforms Single-Phase Steels:
Phase Synergy: Austenite (toughness) + ferrite (strength) = 550 MPa min yield strength.
Pitting Resistance Equivalent (PRE): 34+ (vs. 26 for 316L), thanks to 3% molybdenum and 22% chromium.
Thermal Conductivity: 15 W/m·K (30% higher than 316L), ideal for heat exchanger baffles.
Global Standards
ASTM: A240/A240M (Grade UNS S32205)
EN: 1.4462
NACE: MR0175 compliant for sour service (H₂S environments)
Application-Specific Advantages
| Industry |
2205 Plate Superpower |
Competitor Weakness |
| Chemical Processing |
Handles 40% sulfuric acid at 60°C |
316L fails above 20% concentration |
| Offshore Oil |
Survives 15+ years in splash zones |
Carbon steel requires constant coating |
| Desalination |
Resists biofilm buildup in brine heaters |
Titanium costs 5x more |
| Pulp & Paper |
Withstands corrosive black liquor vapors |
317L plates need frequent replacement |
Fabrication Made Smarter
Cutting: Plasma or waterjet preferred; shear only for thickness <12mm.
Welding: Use 2209 filler metal, keep heat input 0.5–2.5 kJ/mm to preserve phase balance.
Post-Weld Care: No annealing required—phase ratio self-restores below 300°C.
Surface Finish: #4 brushed or 2B mill finish for optimal corrosion resistance.
Global Track Record
Norwegian Oilfield: “2205 plates in our subsea manifolds showed zero SCC after 8 years in North Sea H₂S.”
Chilean Copper Mine: “Replaced 316L acid storage tanks with 2205—maintenance costs dropped 65%.”
Singapore Desal Plant: “Biofilm growth reduced by 80% vs. 904L plates in pre-treatment systems.”
