Duplex 2205
UNS S31803 / S32205EN 1.4462JIS SUS329J3L
The most widely used duplex grade. Roughly double the yield strength of 316L, allowing thinner and lighter sections while delivering far better chloride stress corrosion cracking resistance.
- Twice the yield strength of 316L
- High chloride SCC resistance
- Lower nickel content stabilises cost
Available forms & sizes
| Form | Size range |
|---|---|
| Plates | 1.5 - 100 mm thk, up to 2500 mm wide |
| Seamless Pipes & Tubes | 1/2" - 24" NB, SCH 5S - SCH 160 |
| Welded Pipes | 6" - 48" OD |
| Round Bars | 6 - 500 mm dia |
| Flanges | 1/2" - 48", 150# - 2500# |
| Fittings | 1/2" - 48", SCH 10S - SCH 160 |
Chemical composition (%)
| Element | Min | Max |
|---|---|---|
| C | - | 0.030 |
| Cr | 22.0 | 23.0 |
| Ni | 4.5 | 6.5 |
| Mo | 3.0 | 3.5 |
| N | 0.14 | 0.20 |
Mechanical properties
| Property | Value | Unit |
|---|---|---|
| Yield Strength (0.2%) | 450 min | MPa |
| Tensile Strength | 620 min | MPa |
| Elongation | 25 min | % |
| Hardness | 293 max | HBW |
Physical properties
| Property | Value | Unit |
|---|---|---|
| Density | 7.80 | g/cm3 |
| PREN | 35 | - |
| Max Service Temperature | 300 | C |
Typical applications
Offshore topside piping
Chemical tanker cargo tanks
Desalination evaporators
Pressure vessels
