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Duplex Stainless Steels

A Closer Look at Duplex Stainless Steels

A Closer Look at Duplex Stainless Steels

Applications have included:

  • Hydraulic accumulator bodies and structural components for naval defense
  • Bowls, cones and conveyors for decanter centrifuges
  • Hydraulic cylinder bodies for Marine applications
  • Numerous components used in Mining

Advantages of Duplex Stainless Steel Casting

The starting tubes used in the production of these components can be produced by several processes: hot milled tubing, forged tubing, rolled, welded tubing, even tubing machined from bar stock but many customers have found cost and value benefits by using centrifugal castings.

In many cases, there is no sacrifice in corrosion resistance or mechanical properties when compared to various competing wrought products. Excellent repeatability can be achieved through careful process control in charge make-up, melt, pouring practices and heat treatment. While the mechanical properties of centrifugal castings are not always the equivalent of wrought products, very often the cast properties exceed the customers’ requirements with significant cost-savings.

Benefits:

  • Heavy wall thicknesses (up to 100 mm)
  • Non-standard sizes
  • Alloy flexibility
  • Quantity flexibility

Discussion of Duplex Stainless Steel Benefits

Download our paper (chapters 1 through 5), which offers a detailed survey of how design engineers and purchasing professionals can specify standard duplex alloys, super duplex, super austenitic alloys and newer lean duplex materials. It includes specific comparisons of cast versus wrought properties and attention to achieving cost savings.