Duplex 2205 (UNS S32205) Seamless Pipes & Tubes Manufacturer & Supplier
Duplex 2205 (UNS S32205) is the world's most widely used duplex stainless steel, with a balanced microstructure of approximately 50% ferrite and 50% austenite. It offers nearly double the yield strength of standard austenitic grades with superior corrosion resistance.
UNS: S32205 | Category: Duplex Stainless Steel | Werkstoff Nr: 1.4462 | EN Name: X2CrNiMoN22-5-3
Duplex 2205 — Also Known As
Duplex 2205 is also commonly known as Duplex 2205, 2205 Duplex, Duplex 2205 (UNS S32205) Seamless Pipes & Tubes, S32205, UNS S32205, 1.4462, Werkstoff 1.4462, W.Nr 1.4462, X2CrNiMoN22-5-3, 2205, s31803, ur 45n.
Duplex 2205 — Applicable Standards & Specifications
Duplex 2205 is commonly supplied to ASTM A789, ASTM A790, ASME SA789, ASME SA790, EN 10216-5, EN 10217-7.
Size Range
Outer Diameter: 1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
Wall Thickness: SCH 5S to SCH 160
Chemical Composition (%)
| C | Mn | Si | Cr | Ni | Mo | N | P | S |
|---|---|---|---|---|---|---|---|---|
| 0.030 max | 2.00 max | 1.00 max | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 | 0.030 max | 0.020 max |
Mechanical Properties
- Tensile Strength
- 655 MPa min
- Yield Strength
- 450 MPa min
- Elongation
- 25% min
- Hardness
- 31 HRC max
Physical Properties
- Density
- 7.82 g/cm3
- Melting Range
- 1350-1400 C
- Thermal Conductivity
- 19 W/m-K
- Electrical Resistivity
- 850 nOhm-m
- Specific Heat
- 480 J/kg-K
- Coeff. of Thermal Expansion
- 13.0 um/m-C
Corrosion Resistance
- Pitting Resistance (PREN)
- ~35
- Max Service Temp (Oxidizing)
- 315 C (to avoid 475C embrittlement)
- Intergranular Corrosion
- Highly resistant
- Stress Corrosion Cracking
- Excellent resistance vs austenitic
- General Corrosion Rate
- <0.02 mm/yr in most environments
- Seawater Resistance
- Excellent up to 20C
Applicable Standards
- ASTM A789 / ASME SA789
- ASTM A790 / ASME SA790
- NORSOK MDS D45
- DIN EN 10216-5
Applications
- Offshore oil & gas platforms
- Chemical process vessels and piping
- Heat exchangers in aggressive media
- Desalination plants
- Structural marine applications
- Pulp & paper digesters
Industries Served
- Oil & Gas
- Chemical Processing
- Marine
- Desalination
- Pulp & Paper
Key Advantages
- Nearly double the yield strength of 316L
- Excellent chloride SCC resistance
- Outstanding pitting and crevice corrosion resistance
- NORSOK approved for offshore applications
- Lower nickel content = more stable pricing
- Excellent fatigue resistance
Equivalent Grades
- ASTM
- S32205/S31803
- NORSOK
- MDS D45
- Trade
- SAF 2205