2205 is widely used in chemical, pulp, marine and process service. 2507 is considered for more severe offshore, seawater and desalination conditions.
Fabrication, heat treatment, ferrite balance and corrosion testing are essential for both.
Key points
- 2205: UNS S31803/S32205
- 2507: UNS S32750
- 2507 normally has higher PREN and strength
- Service conditions determine selection