What is 32760 material?

32760 is a super duplex stainless steel, based upon chromium additions of 25% to achieve excellent corrosion resistance. 32760 is shorthand for the grade identified as UNS S32760 by the unified numbering system.

The grade now referred to as 32760 has its roots in a development in the 1980’s by Mather & Platt and subsequently marketed as Zeron 100. 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. Alloy 32760 (UNS S32760, 1.4501, F55) includes a deliberate addition of tungsten, claimed to selectively improve corrosion resistance.

Langley Alloys carries a significant stock of 32760 at our UK and USA warehouses, as round bars from 5/8”-20” diameter (15.87-508mm), plate up to 3” (76.2mm) thickness, as well as pipes in scheduled sizes, flanges and fittings.


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