What is CE3Mn?

ASTM A890 CE3Mn or Grade 5A is the nearest equivalent grade to the wrought super duplex stainless steel UNS S32750. Its ASTM number is ASTM A995 and ASME SA351/995 grade CD3MWCuN or 6A. Meanwhile, J93404 or 25Cr-7Ni-Mo-N is its UNS designation. 

Langley Alloys carries a comprehensive stock of UNS S32750 (SAF2507, 1.4410, F53) as solid bar up to 16” in diameter and plate up to 3” thickness. Machining components from a solid bar or plate can help to reduce the risk of rejection, as the wrought product form is much less likely to suffer from internal defects. 

As these defects become apparent on castings only after machining, considerable time and expense can be lost. However, castings can be an effective way to produce more complex geometries or reduce the cost for larger components or longer production runs. The mechanical properties of a wrought product (rolled, forged) is significantly better than a cast product.

Although we no longer produce castings in-house, we can help our customers source them, and use our in-house testing and inspection facilities as required.

The Key Features of UNS S32750

Some of the key features of UNS S32750 include:

  • Superb resistance to stress corrosion cracking (sometimes referred to as SCC) in chloride-bearing environments
  • Excellent resistance to crevice corrosion and pitting
  • High resistance to general corrosion
  • Good weldability
  • Physical properties which offer advantages in terms of design
  • High resistance to erosion corrosion and corrosion fatigue
  • Very high mechanical strength

What Are The Typical Applications of ce3mn

Some of the typical applications of ce3mn include:

  • Subsea control 
  • Fire-fighting systems
  • Water systems
  • Offshore platforms
  • Heat exchanges

Got any Questions? Get in Touch

For more information about super duplex stainless steel alloys, please don’t hesitate to contact us today. We would be happy to answer any questions that you may have regarding specifications and common applications.

SAF2507 is a registered trademark of Sandvik Intellectual Property AB.


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