Duplex 2205 Stainless Steel Tubeside and 304 SS Shellside Prehea

Duplex 2205 Stainless Steel Tubeside and 304 SS Shellside Preheaters High Pressure Shell and Tube Heat Exchanger

TITAN gained its reputation in the precision welding of complex and difficult to handle corrosion-resistant alloys. While welding Duplex Stainless Steel may seem routine, its welding characteristics can actually be problematic. Difficulties often result if the weld does not have the proper austenitic/ferrite mixture to yield correct strength, toughness and corrosion resistance.

Duplex Stainless Steel can be difficult to weld properly.
The balance of properties is the key.

Duplex Stainless Steels have a microstructure that contains both ferrite and austenite. When Duplex Stainless Steel is melted, it solidifies from the liquid phase to a completely ferritic structure. As the material cools, approximately half of it changes to an austenitic structure. The result is an alloy with a microstructure of roughly 50% austenite and 50% ferrite. Duplex alloys have higher strength and better stress corrosion cracking resistance than most austenitic alloys and greater toughness than ferritic alloys, especially at low temperatures.

Titanium Grade 2 Tubeside with Duplex 2205 Stainless Steel Shell

Titanium Grade 2 Tubeside with Duplex 2205 Stainless Steel Shellside Shell and Tube Heat Exchangers

Duplex 2205 Stainless Steel Tubeside and Shellside Organic Solve

Duplex 2205 Stainless Steel Tubeside and Shellside Organic Solvent Vapor Condenser Shell and Tube Heat Exchanger

Zirconium 702 Tubeside with 2507 Duplex Stainless Steel Shellsid

Zirconium 702 Tubeside with 2507 Duplex Stainless Steel Shellside – Vertical Cooler designed with ASME Lethal Service

TITAN has the experience and knowledge to make sure each weld is always correct. Our proven track record with the reactive metals makes TITAN the best choice for all your Duplex Stainless Steel requirements.

The lower nickel and molybdenum content of the Duplex Stainless Steels as compared to the austenitic grades with similar corrosion resistance, gives the Duplex grades a lower cost per pound. The Duplex grades are also about twice as strong, resulting in material savings because of wall thickness requirements. This means less metal at a lower cost per pound.

Cost Benefits of Duplex Stainless Steel May Make It a Good Choice for Your Project.

AL6XN Tubeside with 2205 Duplex Stainless Steel Shellside TEMA d

AL6XN Tubeside with 2205 Duplex Stainless Steel Shellside TEMA design BEM Fixed Tube Sheets

When considering Duplex Stainless Steel for Heat Exchangers, often there is even more benefit. The lower nickel content of the Duplex grades means a better thermal conductivity as compared to the austenitic equivalent grade. Less heat transfer surface area is required to perform the same duty. Welding the Duplex Stainless Steels seems easy if the only criteria is passing ASME code, but consideration of the all-important weld mixture and correct handling are needed to insure successful corrosion resistance.

Duplex Stainless Steel may be a good material selection for your project. We invite you to call TITAN to discuss your application and we can quickly see if you should consider Duplex. When it comes to the fabrication of Duplex and Super Duplex Stainless Steel, TITAN has the experience and knowledge to make sure it is engineered, built and inspected to the highest standards.

You’ll find more information about applications of Duplex Stainless Steel and common grades in the Technical Resources Section on this site.

Duplex Stainless Steel Fabrications

TITAN regularly designs, engineers and fabricates the following applications of Duplex Stainless Steel and custom process equipment:

Applications of Duplex Stainless Steel

Duplex Stainless Steel serves many different applications in these industry categories:

  • Chemical Process
  • Petrochemical
  • Oil & Gas
  • Pharmaceutical
  • Geothermal
  • Sea Water
  • Water Desalination
  • LNG (Liquefied Natural Gas)
  • Biomass
  • Mining
  • Utilities
  • Nuclear Power
  • Solar Power

Duplex Stainless Steel is very well suited to many industrial processes. The following are some of the environments in which Duplex is fully resistant*.

  • Ammonium Bicarbonate
  • Ammonium Bromide
  • Ammonium Carbonate
  • Ammonium Hydroxide
  • Ammonium Oxalate
  • Ammonium Phosphate
  • Ammonium Sulfate
  • Ammonium Sulfide
  • Ammonium Sulfite
  • Benzoic Acid
  • Calcium Chloride
  • Calcium Hydroxide
  • Calcium Nitrate
  • Carbon Tetrachloride
  • Chlorobenzene
  • Copper Acetate
  • Copper Carbonate
  • Copper Cyanide
  • Cupric Chloride
  • Ethyl Chloride
  • Gallic Acid
  • Magnesium Carbonate
  • Magnesium Chloride
  • Magnesium Sulfate
  • Malic Acid
  • Mercuric Cyanide
  • Mercuric Nitrate
  • Nitric Acid
  • Nitrous Acid
  • Perchloric Acid
  • Phosphoric Acid
  • Picric Acid
  • Potassium Bromide
  • Potassium Cyanide
  • Potassium Dichromate
  • Potassium Hydroxide
  • Potassium Iodide
  • Potassium Oxalate
  • Potassium Permanganate
  • Potassium Sulfate
  • Pyrogallic Acid
  • Quinine Bisulfate (Dry)
  • Quinine Sulfate (Dry)
  • Silver Bromide
  • Silver Nitrate
  • Sodium Acetate
  • Sodium Bicarbonate
  • Sodium Bisulfate
  • Sodium Bromide
  • Sodium Chlorate
  • Sodium Chlorite
  • Sodium Nitrate
  • Sodium Nitrite
  • Sodium Peroxide
  • Sodium Silicate
  • Sodium Sulfate
  • Sodium Sulfide
  • Sodium Sulfite
  • Stannic Chloride
  • Sulfuric Acid
  • Sulfurous Acid
  • Urea
  • Zinc Chloride
  • Zinc Sulfate

For a general guide on corrosion resistance, temperatures and concentrations please see TITAN’s publication, “Corrosion Resistance of Metals in Various Chemical Media” for additional information.*

*Please Note: Final selection of material must be based on actual evaluation of the metal in the corrosive medium under study.

Consult with TITAN if you have need for unique Duplex Stainless Steel process equipment.  Contact us by phone at (805) 487-5050 or toll-free (877) 487-5050 or email info@titanmf.com.