Duplex stainless steels, also referred to austenitic-ferritic, combine many of the beneficial properties of ferritic and austenitic steels.
Duplex steels offer good resistance to pitting and uniform corrosion due to their high content of chromium and nitrogen, and often also molybdenum. The duplex microstructure contributes to the high strength and high resistance to stress corrosion cracking. Duplex steels have good weldability as well.
Applications
- Heat exchangers
- Water heaters
- Pressure vessels
- Large storage tanks
- Rotors, impellers and shafts
- Components for structural design
- Firewalls and blast walls on offshore platforms
- Digesters and other equipment in the pulp and paper industry
- Cargo tanks and pipe systems in chemical tankers
- Desalination plants
- Flue-gas cleaning
- Seawater systems Grades
| Outokumpu |
|
|
Chemical composition analysis, average % |
|
|
EN |
ASTM |
C |
N |
Cr |
Ni |
Mo |
| 2304 |
1.4362 |
S32304 |
0.02 |
0.10 |
23 |
4.8 |
0.3 |
| 2205 |
1.4462 |
S32205
S31803 |
0.02 |
0.17 |
22 |
5.7 |
3.1 |
| SAF 2507™ |
1.4410 |
S32750 |
0.02 |
0.27 |
25 |
7 |
4 |
SAF 2507® is a trademark owned by Sandvik AB.
Dimensions
|
Coil |
Sheet |
| Thickness |
0.5...3.0mm |
0.5...3.0mm |
| Width |
45...1350mm |
400...1350mm |
| Length |
depends on coil weight |
400...8000mm |