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UNS S32654 - EN 1.4652

UNS S32654 - EN 1.4652

UNS S32654, also known as 654SMO, boasts tremendous mechanical strength, making it ideal for high-temperature seawater applications. Moreover, it is simple to weld and shape. This steel alloy is extremely corrosion-resistant and has excellent pitting resistance, making it perfect for sea-based industries. It is also a cost-effective choice in comparison to other stronger nickel alloys.

Equivalent grades

• UNS S32654
• DIN 1.4652
• 654 SMO
• X1CrNiMoCuN24-22-8

Chemical Composition Reference


Physical Property Reference

• Density: 7.88 g/cm³

• Melting Range: 2525-2630 ℉

• Thermal Conductivity (W/m-K): 19.0

• Tensile Strength: 621 MPa

• Elastic Modulus: 200 GPa

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

View full details

UNS S32654 - EN 1.4652

Essential details
7% Mo, very high N alloyed austenitic grade. The most corrosion resistant stainless steel in the world. High mechanical strength. Useful for e.g. pressurized and erosive systems handling chlorinated sea water at higher temperatures, plate heat exchangers and flue gas cleaning applications.

Typical Applications:

- Pressurized and erosive systems handling chlorinated sea water at higher temperatures

- Plate heat exchangers

- Flue gas cleaning

- Process equipment in chemical industry

- Bleaching equipment in the pulp and paper industry

- Desalination


- Food and beverage

- Pharmaceuticals

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