Stainless alloy 1.4462 / Duplex 2205 – properties, applications and technical data
1.4462, also known as Duplex 2205, is a duplex stainless steel that combines high strength with very good corrosion resistance.
The material consists of a balanced microstructure of ferrite and austenite, which provides both high mechanical strength and good resistance to stress corrosion cracking in chloride-containing environments.
Duplex 2205 is often used in the chemical industry, offshore environments, energy industry and marine applications where both strength and corrosion resistance are crucial.
Properties of 1.4462 / Duplex 2205
Duplex 2205 combines the advantages of both austenitic and ferritic stainless steels. The duplex microstructure provides high strength and improved resistance to chloride-induced stress corrosion cracking.
Due to high levels of chromium, molybdenum and nitrogen, the alloy also has very good resistance to pitting and crevice corrosion.
- Type: duplex stainless steel
- Alloy: Fe-Cr-Ni-Mo-N
- Structure: duplex (austenite + ferrite)
- Designations: 1.4462, Duplex 2205, UNS S32205, UNS S31803, F51, SS2377, X2CrNiMoN22-5-3
- Typical composition: Cr ~22%, Ni ~5%, Mo ~3%, N ~0.15 %
Advantages
- Very high strength compared to standard austenitic steels
- Very good resistance to pitting and crevice corrosion
- Good resistance to chloride-induced stress corrosion cracking
- Good fatigue strength
- Good corrosion resistance in marine and chemical environments
Limitations
- Welding requires controlled processes to maintain duplex structure
- Not suitable for very high temperatures
- Machining can be more demanding than standard stainless steels
Common product forms for 1.4462
- Round bar
- Sheet and flat steel
- Tubes and tubes
- Forgings
- Special dimensions according to drawing
Typical components manufactured in Duplex 2205
- Heat exchangers
- Pressure vessels
- Pipe systems in the chemical industry
- Pump and valve components
- Offshore and marine structures
- Equipment for desalination and water treatment
Corrosion resistance
Duplex 2205 has very good resistance to pitting and crevice corrosion in chloride-containing environments.
The duplex structure also provides improved resistance to stress corrosion cracking compared to many austenitic stainless steels.
Environments where 2205 performs well
- Offshore and marine environments
- Chemical process industry
- Desalination and water treatment
- Process equipment with chloride-containing media
Environments to avoid
- Very high temperatures for extended periods
- Environments where simpler stainless steels provide adequate performance
Technical data
| Yield strength (0.2 %) |
~450–550 MPa |
| Tensile strength |
~620–880 MPa |
| Extension |
~25% |
| Density |
~7.8 g/cm³ |
| Modulus of elasticity |
~200 GPa |
| Pitting Resistance Equivalent (PREN) |
~35 |
| Max recommended temperature |
~300°C for long-term operation |
With a global network of suppliers, we can offer 1.4462 / Duplex 2205 in technical dimensions for demanding industrial applications.
Contact us for price, availability and technical advice.
Supplier of Duplex 2205 with certified quality
HARALD PIHL is one of Europe's largest suppliers of special alloys and advanced stainless steels, including duplex materials such as 1.4462.
With over 100 years of experience in the metal industry, we deliver materials with full traceability and certification according to EN 10204 3.1 / 3.2 as well as relevant ASTM and ISO standards.
Cutting, testing and quality assurance are done in-house to ensure the right tolerances and fast global delivery for technically demanding projects.
- Europe's largest stock of nickel and titanium alloys
- Special alloys from stock
- ASTM / ISO standards
- Top quality for safety-critical applications
- Fast global delivery
- Full material certification (EN 10204 3.1 / 3.2)
- Over 100 years in the metal industry
- Nickel and titanium experts
