Duplex Stainless Steel Desalination Pump and Super Duplex Stainless Steel Desalination Pump

We are very experienced in the customized production of duplex stainless steel desalination pump parts and super duplex stainless steel desalination pump parts. We provide super quality of duplex stainless steel desalination pump parts and super duplex stainless steel desalination pump parts, which are designed to meet our customer’s target.

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super duplex stainless steel desalination pump assembly

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How Does Desalination Work?

Desalination is the process of obtaining fresh water from either seawater (30-44 grams of salt per liter) or brackish water from estuaries (less salty). These sources are inexhaustible – they account for nearly 98% of the Earth’s available water – but desalination is expensive and requires much more energy than either wastewater, surface water or groundwater treatment. There are three principle methods of seawater desalination: Thermal Distillation, Reverse Osmosis and Electrodialysis.

What is Duplex Stainless Steel Desalination Pump?

Duplex Stainless Steel Desalination Pump is that the pump is produced by using Duplex Stainless Steel such as Duplex Stainless Steel 2205. Usually Duplex Stainless Steel Desalination Pump is produced by casting process.

Material for Duplex Stainless Steel Desalination Pump

Duplex Stainless Steel 2205 is the most widely used duplex stainless steel grade for duplex stainless steel desalination pump. Also Known as: UNS: UNS S31803 – UNS S32205; SAF: SAF 2205® 22Cr; ASME SA-182 (F51), SA-182 (F60), SA-240, SA-798, SA-790, SA-815; ASTM A182 (F51), A182 (F60), A240, A276, A479, A480, A789, A790, A815, A928, A988; SAE J405

Duplex Stainless Steel 2205 is also called as Duplex 2205. The term of “Duplex” means that the steel consists of a two-phase microstructure — both ferritic stainless steel and austenitic stainless steel. Nitrogen is enhanced in Duplex 2205 comparing to other duplex stainless steel.

The Advantage of Duplex Stainless Steel Desalination Pump:

It combines the benefits of ferritic alloy (which provides high strength & stress corrosion cracking resistance)  and  austenitic alloy (which provides corrosion resistance & easy on fabrication.

Corrosion Resistance of Duplex Stainless Steel Desalination Pump:

Duplex Stainless Steel Desalination Pump is very cost-effective for various applications that require corrosion resistance. The combination of chromium, molybdenum and nitrogen provides good resistance to crevice corrosion and chloride pitting. Corrosion resistance is highly important for applications in marine environments.

Chemical Composition of Duplex Stainless Steel 2205
Cr Ni Mo C N
22.0-23.0 4.50-6.50 3.00-3.50 0.030 Max 0.14-0.20
Mn Si P S Fe
2.00 Max 1.00 Max 0.030 Max 0.020 Max Balance
Mechanical Properties of Duplex Stainless Steel 2205
Grade Tensile Strength
ksi (min)
Yield Strength
0.2% ksi (min)
Elongation (%) Hardness (HB) MAX
2205 90 65 25 217

Characteristics of 2205 Duplex Stainless Steel Desalination Pump:

  • High Strength
  • Great resistance to chloride crevice and pitting corrosion
  • Great resistance to chloride stress corrosion cracking
  • Good resistance to sulfide stress corrosion resistance
  • Good general corrosion resistance

What is Super Duplex Stainless Steel Desalination Pump?

Super Duplex Stainless Steel Desalination Pump is that the pump is produced by using Super Duplex Stainless Steel 2507 or Super Duplex Stainless Steel ZERON® 100. Usually Super Duplex Stainless Steel Desalination Pump is produced by casting process.

Material for Super Duplex Stainless Steel Desalination Pump

The most prominence of Super Duplex Stainless Steel is its exceptional corrosion resistance and strength. Super Duplex Stainless Steel 2507 and Super Duplex Stainless Steel ZERON® 100 are among the most commonly used grades in the family of super duplex stainless steel for super duplex stainless steel desalination pump.

Difference Between Duplex 2507 and Zeron 100: The chemical compositions of Duplex 1507 and Zeron 100 are similar, however Zeron 100 contains more cooper and tungsten. The copper content of Zeron 100 provides excellent resistance to corrosion in many non-oxidizing and mineral acids like hydrochloric and suifuric acid.

Chemical Composition of Duplex Stainless Steel 2507
Cr Cu Mn Mo C
24.0-26.0 0.5 Max 1.20 Max 3.0-5.0 0.03 Max
N Ni P S Si
0.24-0.32 6.0-8.0 0.035 Max 0.02 Max 0.8 Max
Chemical Composition of Duplex Stainless Steel Zeron 100
Cr Cu Mn Mo C N
24.0-26.0 0.5-1.0 1.0 Max 3.0-4.0 0.03 Max 0.2-0.3
Ni P S Si W
6.0-8.0 0.03 Max 0.01 Max 1.0 Max 0.8 Max

Casting Specifications for Super Duplex Stainless Steel Desalination Pump:

For alloy 2507, the casting specification is UNS S32750, A890/A995 5A CE3MN, for ally Zeron 100, the specification is UNS S32760, A890/A995 6A CD3MWCuN.

Duplex & Super Duplex Stainless Steel Casting Desalination Pump Parts