Duriron Pump |link| -

Duriron, a high-silicon cast iron (typically 14.5% Si), is a benchmark material for pumps handling aggressive, erosive, and corrosive slurries. This paper examines the metallurgy of Duriron, its exceptional resistance to acids (especially sulfuric and nitric), its inherent brittleness, and the design considerations required for centrifugal and diaphragm pumps. Key industrial applications in chemical processing, mining, and wastewater treatment are reviewed.

Because Duriron is brittle, operation and maintenance differ from standard ANSI pumps. duriron pump

The term "Duriron" is actually a proprietary eponym—a brand name that became synonymous with the material itself. The alloy is a high-silicon cast iron, typically containing between 14.5% and 15% silicon. This high silicon content is the secret sauce; it creates a tough, passive oxide layer on the surface of the metal that renders it exceptionally resistant to corrosion. Duriron, a high-silicon cast iron (typically 14

Standard cast iron is an alloy of iron and carbon. It is strong but chemically reactive. When silicon is added in small amounts, it acts as a deoxidizer. However, when the silicon content is pushed above 14%, a metallurgical transformation occurs. The iron forms a solid solution with the silicon, and the microstructure becomes dominated by a hard, brittle phase. Because Duriron is brittle, operation and maintenance differ

In 1997, Duriron merged with BW/IP to form Flowserve Corporation, which continues to manufacture the pumps under the Durco Mark 3 series. 2. Key Technical Features