ASTM A789 UNS S31803 Duplex Stainless Steel Heat Exchanger Tube Duplex 2205 Seamless Tube
Price:
Negotiable
MOQ:
500kgs
Delivery Time:
7 DAYS
Brand:
YUHONG
Product 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
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Company
YUHONG HOLDING GROUP CO., LTD
Location
20 Floor, No.1 New World Building, NO.1018 Min'an Road, Yinzhou District, Ningbo, China, ZIP:315040
Contact Person
Sales Dept.