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ASTM A789 S32205 Duplex Stainless Steel Welded Tube High Strength Chloride SCC Resisting Service
| MOQ: | 5Ton |
| Price: | Based on grade, size, surface, processing, quantity and current raw material market price. |
| Standard Packaging: | Standard seaworthy export packing with bundles, waterproof wrapping, pallets or wooden cases. |
| Delivery Period: | 7-15 |
| Payment Method: | L/C,D/A,D/P,T/T,Western Union |
| Supply Capacity: | Stock supply, regular production and custom manufacturing available. |
Shaanxi Shangyou Stainless Steel Co., Ltd. supplies ASTM A789 S32205 duplex stainless steel welded tube for global heat exchanger manufacturers, chemical processors, oil and gas operators, and equipment fabricators requiring high-strength tubing with exceptional resistance to chloride-induced stress corrosion cracking. Produced to ASTM A789/A789M, this specification covers seamless and welded ferritic/austenitic (duplex) stainless steel tubing for general corrosion-resisting service, with particular emphasis on resistance to stress corrosion cracking.
ASTM A789 is the standard specification for duplex stainless steel tubing (distinct from A790 pipe), covering sizes typically from 1/4″ to 12″ OD for heat exchanger and condenser service. S32205(also known as 2205, UNS S32205, EN 1.4462) is the improved version of S31803 with tighter composition control: 22.0-23.0% chromium, 4.5-6.5% nickel, 3.0-3.5% molybdenum, and 0.14-0.20% nitrogen. The balanced chemistry results in a dual-phase microstructure of approximately 50% ferrite and 50% austenite after proper heat treatment. The tube shall be made by an automatic welding process and must be solution annealed at 1020-1100°C and quenched to achieve the target microstructure.
| Dimension | Specification |
|---|---|
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Product Name
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ASTM A789 S32205 Duplex Stainless Steel Welded Tube |
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Product Alias
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2205 Welded Tube / UNS S32205 Tubing / EN 1.4462 Tube / Duplex Heat Exchanger Tube |
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Material Type
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Duplex Stainless Steel (Austenite-Ferrite, ~50% each) |
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Key Feature
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450 MPa min yield; chloride SCC resistance; PREN ~36; solution annealed; welded; flange tested |
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UNS Number
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UNS S32205 |
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EN Equivalent
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EN 1.4462 (X2CrNiMoN22-5-3) |
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Chemical Composition
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Cr 22.0-23.0% / Ni 4.5-6.5% / Mo 3.0-3.5% / N 0.14-0.20% / C ≤0.030% / Mn ≤2.00% / Si ≤1.00% / Fe Balance |
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Mechanical Properties
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Tensile ≥620 MPa / Yield ≥450 MPa / Elongation ≥25% / Hardness ≤293 HBW |
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Heat Treatment
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Solution annealed at 1020-1100°C + water quench or air cool |
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Manufacturing Process
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Coil/Plate Forming → Automatic Welding → Solution Annealing → Quenching → Sizing → Flange Test → Hydro/NDE Testing |
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Primary Applications
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Heat Exchangers / Condensers / Oil & Gas / Chemical Processing / Marine Environments |
| Parameter | Available Options |
|---|---|
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Product Standard
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ASTM A789/A789M, ASME SA-789 |
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UNS Equivalent
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UNS S32205 |
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Outside Diameter (OD)
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1/4″ to 12″ (6.35mm to 323.85mm) standard; custom sizes available |
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Wall Thickness
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0.020″ to 0.220″ (0.51mm to 5.59mm) standard; custom up to 30mm |
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Length
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Single random, double random, or cut-to-length |
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Pipe End
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Plain End (PE) / Beveled End (BE) |
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Heat Treatment
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Solution annealed at 1020-1100°C + quench (mandatory) |
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Welded Tube Testing
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Flange Test (required for welded tubes) / Hydrostatic or NDE Test / Tension Test / Flattening Test / Hardness Test |
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Corrosion Testing
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Pitting Corrosion Test per ASTM G48; Intergranular Corrosion Test per ASTM A262 |
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Documents
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MTC 3.1 / Inspection Reports / Packing List / Heat Number Traceability |
ASTM A789 S32205 duplex welded tube is specified for tubing applications requiring high strength and resistance to chloride-induced pitting, crevice corrosion, and stress corrosion cracking. It is a "mainstay" grade material in the oil and gas industry.
Typical applications include:
- Heat exchangers and condensers (chloride-bearing cooling water, brackish water)
- Oil and gas production tubing and flowlines
- Chemical processing plant tubing handling organic acids and chlorides
- Desalination plant heat exchanger tubing
- Pulp and paper bleaching equipment
- Offshore and marine environments
Key selection considerations: ASTM A789 is the tubing counterpart to ASTM A790 (pipe). Select S32205 over S31803 for more consistent mechanical properties and corrosion resistance. For welded tubes, the flange test is a mandatory mechanical test. Solution annealing and quenching are mandatory to prevent detrimental intermetallic phases. For heat exchanger service, inner surface cleanliness requirements (pickled & passivated or bright annealed) are typically specified. The recommended service temperature range is -40°C to 250°C; duplex steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.
Shangyou Stainless Steel provides value-added processing including custom cutting, beveling, and end protection for duplex welded tubes. Welded tubes for heat exchanger applications require careful weld seam quality control.
All tubes are packed with export-standard protection including protective end caps, steel strapping, waterproof wrapping, and wooden pallets or steel frames.
Quality documents include MTC 3.1, inspection reports, packing list, and heat number traceability. Third-party inspection (SGS, TUV, BV) can be arranged upon request.
1. What is ASTM A789?
ASTM A789 is the standard specification for seamless and welded ferritic/austenitic (duplex) stainless steel tubing for general corrosion-resisting service, with particular emphasis on resistance to stress corrosion cracking.
2. What is the difference between ASTM A789 and ASTM A790?
ASTM A789 coverstubing(typically heat exchanger sizes, OD ≤ 12″); ASTM A790 covers pipe(larger NPS sizes).
3. What is the UNS number for 2205?
UNS S32205 (improved version).
4. What is the difference between S31803 and S32205?
S32205 is the improved version with tighter composition control (22-23% Cr, 3.0-3.5% Mo, 0.14-0.20% N) for more consistent properties.
5. What mechanical properties does S32205 have?
Tensile ≥620 MPa, Yield ≥450 MPa, Elongation ≥25%, Hardness ≤293 HBW.
6. Is heat treatment required for S32205?
Yes, solution annealing at 1020-1100°C followed by water quench or air cool is mandatory.
7. What testing is required for welded tubes under ASTM A789?
Flange test (specific to welded tubes), tension test, flattening test, hardness test, and hydrostatic or NDE test.
8. What is the PREN of S32205?
~35-40.
9. What are typical applications for S32205 tubing?
Heat exchangers, condensers, oil & gas production, chemical processing, desalination, and marine environments.
10. What temperature range is S32205 suitable for?
-40°C to 250°C. Prolonged use at elevated temperatures may cause embrittlement.
Need ASTM A789 S32205 duplex stainless steel welded tube for heat exchanger, oil & gas, chemical, or marine applications? Send requirements including grade, OD/wall thickness/length, quantity, and intended service conditions.
Shangyou Stainless Steel provides custom sizes, processing, and export solutions for global B2B customers.
