What is Zeron 100? Super Duplex

Following the invention of super duplex stainless steels in 1967 by Langley Alloys with our Ferralium 255, Zeron 100 was an alternative grade developed in the 1980’s by Mather & Platt.

Mather & Platt was a UK-based company, hailing from Manchester, focused on the manufacture of large-scale centrifugal pumps. The use of super duplex stainless steels for such applications was obvious, given the potentially aggressive solutions being handled, requiring significant corrosion resistance, strength and wear resistance. Hence, the team at Mather & Platt sought to optimise ease of casting and long-term performance of their pump bodies for more demanding applications.  The pump division of Mather & Platt was subsequently acquired by Weir Pumps, although the Manchester site and foundry closed. The Zeron 100 trademark is now held by Rolled Alloys Inc.

This particular grade is more widely referred to as Alloy 32760 (UNS S32760, 1.4501, F55). It utilises the 25% chromium content of other super duplex stainless steels, but also includes a deliberate addition of tungsten, claimed to selectively improve corrosion resistance.

Langley Alloys stocks Alloy 32760 from 1/2″ to 16″ diameter in solid bars, plus plate up to 2 1/2″ thickness.