2205 is the most widely used duplex stainless steel, combining austenitic and ferritic structures for excellent stress corrosion cracking resistance and high mechanical strength at a cost-effective price point.
Key Properties
Duplex Structure: Balanced austenite-ferrite microstructure for toughness and strength.
Corrosion: Excellent resistance to chlorides, organic acids, and stress corrosion cracking.
Strength: Yield strength ~450 MPa, twice that of 304/316.
Cost: More economical than super duplex grades like 2507.
Common Applications
Chemical Processing: Heat exchanger baffles, pressure vessel internals, and process piping supports.
Oil & Gas: Flow line clamps, manifold components, and gathering system brackets.
Pulp & Paper: Digester internals, bleaching equipment shafts, and liquor piping supports.
Marine: Ship hull stiffeners, cargo tank supports, and seawater system brackets.