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ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
Specifications
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
MOQ :
500kgs
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
Description

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

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

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

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Product Detail
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
MOQ :
500kgs
Payment Terms :
L/C,T/T
Contact Supplier
ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube

YUHONG HOLDING GROUP CO., LTD

Verified Supplier
3 Years
ningbo
Since 1990
Business Type :
Manufacturer, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Stainless Steel Heat Exchanger Tube, Studded Tube, Duplex Stainless Steel Heat Exchanger Tube
Total Annual :
50M-70M
Employee Number :
50~800
Certification Level :
Verified Supplier
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