ASTM A789 UNS S32205 Duplex Stainless Steel Tube
ASTM A789 UNS S32205 Duplex Stainless Steel Tubes are engineered for high-performance applications where exceptional strength, stress corrosion cracking resistance, and superior durability are essential. UNS S32205 is a duplex stainless steel grade combining a balanced microstructure of ferrite and austenite, offering nearly double the strength of standard austenitic stainless steels while delivering excellent resistance to pitting, crevice corrosion, and chloride-induced attacks.
These tubes are widely used in desalination plants, chemical processing, offshore platforms, heat exchangers, and pressure equipment requiring reliability under demanding conditions.
Key Features
- Superior resistance to pitting and crevice corrosion
- High mechanical strength and toughness
- Excellent performance in chloride-rich and marine environments
- Low thermal expansion and high thermal conductivity
- Ideal for corrosive and high-pressure applications
- Long service life with minimal maintenance requirements
Equivalent Grade
| Standard |
Grade |
| UNS |
S32205 |
| EN / DIN |
1.4462 |
| WNR |
1.4462 |
| AFNOR |
Z3 CrN 22.05 |
| SS |
2377 |
ASTM A789 UNS S32205 Chemical Composition
| Element |
Percentage (%) |
| Chromium (Cr) |
22.0 – 23.0 |
| Nickel (Ni) |
4.5 – 6.5 |
| Molybdenum (Mo) |
3.0 – 3.5 |
| Manganese (Mn) |
≤ 2.0 |
| Silicon (Si) |
≤ 1.0 |
| Nitrogen (N) |
0.14 – 0.20 |
| Carbon (C) |
≤ 0.03 |
| Phosphorus (P) |
≤ 0.03 |
| Sulfur (S) |
≤ 0.02 |
| Iron (Fe) |
Balance |
ASTM A789 UNS S32205 Mechanical Properties
| Property |
Value |
| Tensile Strength |
≥ 620 MPa |
| Yield Strength (0.2% Proof) |
≥ 450 MPa |
| Elongation |
≥ 25% |
| Hardness |
≤ 290 HB |
Physical Properties
| Property |
Value |
| Density |
7.80 g/cm³ |
| Thermal Conductivity |
19 W/m·K |
| Electrical Resistivity |
0.85 µΩ·m |
| Modulus of Elasticity |
200 GPa |
| Melting Range |
1350 – 1450°C |
Type of Grade UNS S32205 Duplex Tubes
- Seamless Tubes
- Welded Tubes
- ERW Tubes
- EFW Tubes
- Heat Exchanger Tubes
- Instrumentation Tubes
Application
- Oil & Gas Processing
- Petrochemical Equipment
- Heat Exchangers & Condensers
- Marine & Offshore Structures
- Desalination Plants
- Chemical Processing Units
- Pulp & Paper Industry
- Pressure Vessels
- Food & Pharmaceutical Industry
Reviews
There are no reviews yet.