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Duplex 2205

Duplex 2205

Atlanta Rod manufactures Duplex 2205 hex bolts, nuts, and screws to your custom specifications, and we guarantee to meet your delivery schedule.

The high strength that makes Duplex 2205 useful in many applications unfortunately reduces its machinability. Cutting speeds are approximately 20% slower than for grade 304.  The strength of Duplex 2205 also makes bending and forming more difficult; requiring larger capacity equipment than for austenitic stainless steels. Atlanta Rod has the capacity and equipment to handle all of your Duplex 2205 projects.

Duplex 2205 is the most widely used duplex (ferritic/austenitic) stainless steel grade.  The Duplex 2205 alloy is a nitrogen-enhanced duplex stainless steel alloy. The nitrogen serves to significantly improve the corrosion resistance of the alloy; especially in the welded condition.

The typical high Cr, Mo and Ni contents of AL 2205 alloy give it a high PREN (Pitting Resistance Equivalent) of 35.8, further enhancing its corrosion resistance.  The PREN of AL 2205 alloy exceeds those of types 316L and 317L stainless steels. When heat-treated properly, the composition of AL 2205 alloy produces a microstructure that consists of a nearly equal mixture of austenite and ferrite phases.

The microstructure and composition of the Duplex 2205 alloy provides corrosion resistance to many environments that is superior to Types 316 or 317, and a minimum yield strength that is more than double that of conventional austenitic stainless steels. The microstructure and phase balance of Duplex 2205 alloy have been designed to facilitate the production of pipe and tube products. All AL 2205 alloys are metallographically examined to ensure that the as-shipped product is essentially free from the presence of detrimental precipitate phases such as sigma.

Typical Room Temperature Properties

Typical mechanical properties for annealed Duplex 2205 alloy material at room temperature are listed below:

Applications for Duplex 2205:

  • Chemical processing, transport and storage
  • Oil and gas exploration and processing equipment
  • Marine and other high chloride environments
  • Pulp and paper digesters, liquor tanks and paper machines

Information from ATI Properties, Inc., owner of the trademark for Duplex 2205.