What is UNS S32750 material?

UNS S32750 is a super duplex stainless steel, also referred to as ASTM A182 F53 and DIN 1.4410.

This particular 25% Cr super duplex stainless steel was originally developed by Sandvik (now Alleima) during the 1990’s and marketed as SAF2507. With an increased chromium content compared with F51 it offers improved pitting corrosion resistance.  The yield strength is also higher, allowing component designers to reduce section size for load-bearing applications.

‘Duplex’ stainless steels are a family of stainless steels that contain a mixed microstructure of austenite and ferrite phases. They offer a combination of good corrosion resistance and high strength, making them suitable for a wide range of applications.

Super duplex stainless steels have a higher content of alloying elements, such as chromium, nickel, and molybdenum, compared to duplex stainless steels. They are based upon 25% chromium content. As such, super duplex stainless steels exhibit even greater corrosion resistance and higher strength than duplex stainless steels, making them suitable for more demanding environments.

Langley Alloys carries the most complete range of duplex and super duplex stainless steels, in up to 40 different sizes, and in quantities sufficient to meet the largest of projects. In addition to S32750, we also carry large quantities of S32205 (DIN 1.4462, ASTM A182 F51), S32760 (DIN 1.4501, ASTM A182 F55) and Ferralium 255 (DIN 1.4507, ASTM A182 F61).

Langley Alloys stocks S32750 solid bars in sizes from 5/8” to 20” (15.87-508mm) diameter, plate up to 3” (76.2mm) thick, plus pipes in scheduled sizes, fittings and flanges.


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