Stainless steel
EU
1.4462 - 329LN - X2CrNiMoN22.5.3 - Z3CND 22-05 Az
US
AISI 318LN - UNS S31803 - F51
Duplex stainless steel, specially designed for use in hostile chloride-rich environments
AISI 318LN stainless steel - 1.4462 - Available from stock
The 1.4462 alloy, also known as 329LN, X2CrNiMoN22-5-3 or UNS S31803, is aduplex stainless steel. This type of steel combines properties of austenitic and ferritic structures, offering the ideal balance between corrosion resistance and superior mechanical properties.
Technical summary of this steel:
- Europe: 1.4462 | 329LN | X2CrNiMoN22.5.3 | Z3CND 22-05 Az
- USA: UNS S31803 | F51
- Europe: EN 10028-7 | EN 10088-2 | EN 10088-3 | EN 10088-4 | EN 10088-5 | EN 10216-5 | EN 10217-7 | EN 10222-5 | EN 10250-4 | EN 10253-3 | EN 10253-4 | EN 10263-5 | EN 10270-3 | EN 10272 | EN 10294-2 | EN 10296-2 | EN 10297-2 | EN 13445-2 | EN 13480-2 | NF S 94-090
- USA: ASTM A240 | A789 | A790 | A928 | A479 | A276 | A182
- Corrosion resistance: excellent resistance in chloride-rich environments, higher than that of standard austenitic stainless steels.
- Superior mechanical properties: higher tensile and yield strength than austenitic steels thanks to its duplex structure.
- Good stress corrosion resistance, particularly in chloride environments, an essential feature for maritime applications and some chemical applications.
- Although duplex stainless steels can undergo heat treatment to enhance their properties, the 1.4462 alloy is generally used in its solution state (heat treating at around 1020-1100°C / 1868-2012°F) to optimise its corrosion resistance and mechanical properties.
Properties
- Corrosion resistance: excellent resistance in chloride-rich environments, higher than that of standard austenitic stainless steels.
- Superior mechanical properties: higher tensile and yield strength than austenitic steels thanks to its duplex structure.
- Good stress corrosion resistance, particularly in chloride environments, an essential feature for maritime applications and some chemical applications.
Standards and Designations
Heat treatment
- Although duplex stainless steels can undergo heat treatment to enhance their properties, the 1.4462 alloy is generally used in its solution state (heat treating at around 1020-1100°C / 1868-2012°F) to optimise its corrosion resistance and mechanical properties.
Special advantages
Conclusion
Application
- 1.4462 stainless steel is specially designed for hostile environments, particularly chloride-rich environments. It is widely used in the chemical industry, water treatment, the oil and gas sectors, as well as maritime applications.
- Used for making pumps, valves, pipes, desalination systems and other critical components often exposed to corrosive conditions.
- The 1.4462/UNS S31803 alloy is known for its corrosion resistance in chloride-rich environments, superior mechanical characteristics, and stress corrosion resistance. This makes it an ideal choice for a variety of applications, especially in hostile environments.
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