SAF 2507 | Chloride Resistance Champion
Superior stress corrosion cracking resistance in seawater cooling systems. DNV-GL approved for subsea applications, with 35% higher thermal conductivity than standard duplex grades. Guangxin PipeTech, a trusted duplex stainless steel tube supplier in China, supplies duplex 2205 tube with superior corrosion resistance for oil & gas applications. Buy duplex stainless steel tube at competitive prices from us.
| Technical Specifications | |
| PREN Formula | %Cr+3.3%Mo+16%N≥43 |
| Critical Pitting Temp | 85°C in FeCl₃ |
| Hardness | 290 HB max |
| Thermal Conductivity | 19 W/m·K @100°C |
| Package | VCI paper wrapped |
UNS S32750 requires PREN ≥43 (%Cr + 3.3x%Mo + 16x%N). Controlled manganese <1.2% prevents Z-phase formation. Nickel maintained at 6-8% for optimal phase balance.
Proof Strength: >550 MPa @20°C
H₂S Tolerance: NACE TM0177 Method A at 25 psi
CTE: 12.5 µm/m°C (20-300°C)
Critical Pitting Temp: 85°C per ASTM G48 Method D
Forged billets undergo solution annealing at 1080°C with rapid water quenching. ASTM E562 phase balance verification. Hydrogen bake-out at 200°C prevents HIC (hydrogen-induced cracking).
SWRO (seawater reverse osmosis) pressure vessels
Offshore seawater injection systems
Shipboard desalination plants
Ballast water treatment heat exchangers
DNV-GL OS F101 • NORSOK M630 • ASTM A269
