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UNS S32205 (S31803) - EN 1.4462

UNS S32205 (S31803) - EN 1.4462

UNS S32205 (S31803) is a nitrogen alloyed duplex stainless steel containing 22% Chromium, 3% Molybdenum and 5-6% Nickel, providing superior strength and exceptional corrosion resistance. Impact toughness is also increased, along with localized and general stress corrosion-resistance properties.

Equivalent grades

• UNS S32205
• UNS S31803
• DIN 1.4462
• AISI 318LN
• X2CrNiMoN22-5-3

Chemical Composition Reference


Physical Property Reference

• Density: 7.80 g/cc

• Tensile Strength: 750 MPa

• Yield Strength: 460 MPa

• Modulus of Elasticity: 200 GPa

• Thermal Conductivity: 15.0 W/m-K

Stock & Dimensions

Our warehouse has a large number of stock to provide you with a variety of products in different sizes, and can also customize the size according to your needs.
• Bar: 0.5~600mm Diameter
• Coil: 0.5~150mm Thick
• Plate: 0.5~200mm Thick
• Pipe: 6~630mm External Diameter; 0.5~40mm Wall Tick
• Available in specific sizes

Product Forms

We provide you with a variety of product forms, including but not limited to:
• Bar/Rod
• Pipe/Tube
• Coil/Strip
• Plate/Sheet/Circle
• Wire
• Fitting (Flange, Elbow, Tee...)
• Customize

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UNS S32205 (S31803) - EN 1.4462

Essential details
Duplex UNS S31803/ S32205 are the most common duplex grades in the market. They have very good resistance to localized corrosion and stress corrosion cracking in combination with high mechanical strength. They are widely used in oil & gas, hydro power, pressure vessels, pulp & paper, structural components and chemical tankers. The alloys are not intended to be used at temperatures above 300°C due to embrittlement.

Typical Applications:

- Chemical processing, transport and storage – pressure vessels, tanks, piping, and heat exchangers

- Oil and gas exploration and processing equipment – piping, tubing, and heat exchangers

- Marine and other high chloride environments

- Effluent scrubbing systems

- Pulp and paper industry – digesters, bleaching equipment, and stock-handling systems

- Cargo tanks for ships and trucks

- Food processing equipment

- Biofuels plants

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