Duplex Stainless Steel Pumps

Duplex stainless steels have a ‘duplex’ two-phase micro-structure consisting of both austenitic and ferritic grains that gives them a combination of attractive properties. Duplex alloys were developed around a 22% Chromium addition level.

In general Duplex stainless steel pumps are twice as strong as either austenitic or ferritic stainless steel pumps. They achieve good toughness and ductility, somewhere between the two. Their corrosion resistance is also very good, assuming comparable levels of Chromium, Molybdenum and Nitrogen in selected compositions. One important advantage over austenitic stainless steels is their resistance to stress corrosion cracking.

Duplex Stainless Steel pumps are highly heat resistant, with temperatures over 300^oC and cannot be hardened by heat. Duplex Stainless Steel Pumps are oftens used for pumps within the chemical, petrochemical  and offshore sectors.