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High resistance to pitting and crevice corrosion
Excellent in most caustic environments
Good weldability
Duplex 2205, also known as UNS S32205, is a nitrogen-enhanced stainless steel. Users choose Duplex 2205 for its excellent corrosion resistance along with its high strength. It is important to note that Duplex 2205, offers much higher levels of corrosion resistance than most other austenitic stainless steels. Other benefits include:
High resistance to pitting and crevice corrosion
Excellent in most caustic environments
Good weldability
To be considered Duplex 2205, a stainless steel must have a chemical composition that includes:
| Grade | C | Si | Mn | P≤ | S≤ | Cr | Mo | Ni | Other |
| 2205 | ≤0.030 | ≤1.00 | ≤2.00 | 0.035 | 0.015 | 21-23 | 2.5-3.5 | 4.5-6.5 | – |
Mechanical Properties
| Grade | YS(Mpa) ≥ | TS (Mpa) ≥ | El (%) ≥ | Hardness(HV) ≤ |
| 2205 | 460 | 640 | 25 | 293 |
This unique mix of materials makes Duplex 2205 the right choice for a number of different critical applications in a range of industries, including:
Chemical processing, transport, and storage
Marine and Land cargo tanks
Biofuel production
Food processing
Pulp and Paper manufacturing
Oil and gas exploration and processing
Waste management
High chloride environments
