What is super duplex material? Stainless Steels

Super duplex is ‘shorthand’ for a family of high-performance stainless steels based around a 25% chromium content. As the duplex name suggests, they have a microstructure made up from both austenitic and ferritic grains, which provides their unique combination of physical and mechanical properties. The original super duplex stainless steel, Ferralium 255, was developed by Langley Alloys in the 1960’s. A number of other grades have subsequently been developed.

Langley Alloys stocks the most complete range of super duplex material, including solid bars up to 16” (406.2mm) diameter, plate up to 3” thickness, plus access to pipes, flanges and fittings through our supply chain.

These are available in Ferralium 255 (UNS S32550, F61), SAF2507 (UNS S32750, F53) and S32760 (F55, Zeron 100).