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China ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205
China ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205

  1. China ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205
  2. China ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205
  3. China ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205
  4. China ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205

ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205

  1. MOQ: 500kgs
  2. Price:
  3. Get Latest Price
Payment Terms L/C,T/T
Delivery Time 7 DAYS
Packaging Details Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Product Name Duplex Steel Seamless Tube
Standard ASTM A789, ASME SA789
Material UNS S31803, Duplex 2205, 1.4462
OD 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc.
Thickness BWG10-25
Length Single Random, Double Random & Cut Length
End Plain End, Beveled End
High Light ASTM A789 UNS S31803 Duplex Steel Tube, Duplex 2205 Seamless Tube, Heat Exchanger Tube
Brand Name YUHONG
Model Number ASTM A789 UNS 31803 Duplex Stainless Steel Seamless Tube
Certification ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin CHINA

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  1. Product Details
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Product Specification

Payment Terms L/C,T/T Delivery Time 7 DAYS
Packaging Details Ply-wooden Case /Iron Case/ Bundle with plastic Cap Product Name Duplex Steel Seamless Tube
Standard ASTM A789, ASME SA789 Material UNS S31803, Duplex 2205, 1.4462
OD 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc. Thickness BWG10-25
Length Single Random, Double Random & Cut Length End Plain End, Beveled End
High Light ASTM A789 UNS S31803 Duplex Steel Tube, Duplex 2205 Seamless Tube, Heat Exchanger Tube Brand Name YUHONG
Model Number ASTM A789 UNS 31803 Duplex Stainless Steel Seamless Tube Certification ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin CHINA
High Light ASTM A789 duplex stainless steel tubeUNS S31803 heat exchanger tubeDuplex 2205 seamless tube

ASTM A789 UNS S31803 / Duplex 2205 Stainless Steel Seamless Tube Heat Exchanger Tube

 

 

ASTM A789 UNS S31803 is one of the most common specifications for duplex stainless steel seamless tubes, widely used in heat exchanger applications. Heat Exchanger Tube is kind of a tube specifically manufactured to meet the tight tolerances, cleanliness, and integrity requirements needed for transferring heat between two fluids without mixing. Duplex S31803 is a high-strength, corrosion-resistant and cost-effectiveness material designed to withstand aggressive environments (like chlorides and seawater) while providing better thermal efficiency and lower wall thickness compared to conventional 300-series stainless steels like 316L. 
 

 

Why Choose S31803 / 2205 for Heat Exchangers?

  • High strength: thinner walls / higher pressure rating / lighter weight.
  • Outstanding chloride SCC resistance: longer life in seawater/brine.
  • Good thermal conductivity: better efficiency than many high-alloy austenitics.
  • Cost-effective balance of performance vs. price vs. lifetime.

 

 

ASTM A789 UNS S31803 Duplex Stainless Steel Seamless Tube Equivalent Grade

Duplex

UNS Designation

Werkstoff NR.

EN / DIN

Grade

2205

S31803

1.4462

X2CrNiMoN22-5-3

F51

 

 

ASTM A789 UNS S31803 Duplex Stainless Steel Seamless Tube Chemical Composition %

C Si Mn P S Cr Ni Mo N Cu
0.03 max 1.0 max 2.0 max 0.030 max 0.020 max 21-23 4.5-6.5 2.5-3.5 0.08-0.20 -

 

 

ASTM A789 UNS S31803 Duplex Stainless Steel Seamless Tube Mechanical Properties

S31803 / S32205 Density Melting Point Yield Strength (0.2%Offset) Tensile Strength Elongation
7.8 g/cm3 1350 °C (2460 °F) Psi – 80000 , MPa – 550 Psi – 116000 , MPa – 800 15 %
 

 

Core Performance Advantages-- Corrosion Resistance (Critical for Heat Exchangers)

  • Chloride SCC resistance: Far superior to 304/316L in seawater, brine, H₂S, and chloride-containing process fluids.
  • Pitting/crevice corrosion: PREN (Pitting Resistance Equivalent Number) ≈ 34–36; performs much better than 316L.
  • Uniform corrosion: Good in sulfuric, phosphoric, organic acids and neutral chloride solutions.
  • Sea water service: Excellent for offshore, desalination, and marine heat exchangers.

 

 

Application

  • Shell and Tube Heat Exchangers
  • Coolers (oil coolers, gas coolers)
  • Condensers in refineries and chemical plants
  • Process piping in offshore oil & gas platforms (topsides)
  • Desalination plants (evaporators)
  • Pulp and paper industry digesters

 

 

 

 

Company Details

Bronze Gleitlager

,

Bronze Sleeve Bushings

 and 

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 from Quality China Factory
  • Business Type:

    Manufacturer,Importer,Exporter,Trading Company,Seller,Other

  • Year Established:

    1990

  • Total Annual:

    50M-70M

  • Employee Number:

    50~800

  • Ecer Certification:

    Verified Supplier

Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories,  the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n... Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories,  the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n...

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  • YUHONG HOLDING GROUP CO., LTD
  • 20 Floor, No.1 New World Building, NO.1018 Min'an Road, Yinzhou District, Ningbo, China, ZIP:315040
  • https://www.steelfintube.com/

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