Duplex 2205 Stainless Steel Plate Manufacturer & Supplier
Duplex 2205 has a roughly 50/50 ferrite-austenite microstructure, giving about twice the yield strength of 316L with far better chloride stress corrosion cracking resistance. The usual outcome is a thinner, lighter vessel for the same duty. The most specified duplex grade worldwide.
UNS: S32205 / S31803 | Category: Duplex & Super Duplex Stainless Steel
Size Range
Outer Diameter: Thickness 3 - 100 mm · Width 1000-3000 mm · Length 2000-12000 mm
Wall Thickness: 3 - 100 mm
Chemical Composition (%)
| C | Si | Mn | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| 0.030 max | 1.00 max | 2.00 max | 0.030 max | 0.020 max | 22.00-23.00 | 4.50-6.50 | 3.00-3.50 | 0.14-0.20 |
Mechanical Properties
- Yield Strength Rp0.2
- 450 MPa min
- Tensile Strength Rm
- 620-880 MPa
- Elongation A5
- 25% min
- Hardness
- 293 HB max / 31 HRC max
- Impact KV -46 °C
- 45 J min
- Ferrite content
- 35-55%
Applicable Standards
- ASTM A240 / ASME SA240
- ASTM A923 (intermetallic phase test)
- EN 10088-2
- EN 10028-7
- NACE MR0175 / ISO 15156 (on request)
- EN 10204 3.1 certification
Applications
- Pressure vessels & reactors
- Chloride service storage tanks
- Offshore process equipment
- Heat exchanger tubesheets
- Desalination plant equipment
- Pulp & paper digesters
Industries Served
- Oil & Gas
- Chemical & Petrochemical
- Water & Desalination
- Marine & Shipbuilding
- Pulp & Paper
Equivalent Grades
- EN
- 1.4462 / X2CrNiMoN22-5-3
- UNS
- S32205 / S31803
- JIS
- SUS 329J3L