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ASTM A790 S32205 Duplex Stainless Steel Welded Pipe High Strength Chloride Stress Corrosion 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 A790 S32205 duplex stainless steel welded pipe for global EPC contractors, oil and gas operators, chemical processors, and marine fabricators requiring high-strength piping with exceptional resistance to chloride-induced stress corrosion cracking. Produced to ASTM A790/A790M, this specification covers seamless and straight-seam welded ferritic/austenitic (duplex) steel pipe for general corrosive service, with particular emphasis on resistance to stress corrosion cracking.
ASTM A790 is the primary pipe specification for duplex stainless steel. 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, delivering yield strength nearly double that of 304/316 austenitic grades. The pipe shall be made by an automatic welding process without the addition of filler metal and must be solution annealed and water quenched to achieve the target austenite-ferrite balance.
| Dimension | Specification |
|---|---|
| Product Name | ASTM A790 S32205 Duplex Stainless Steel Welded Pipe |
| Product Alias | 2205 Welded Pipe / UNS S32205 Pipe / EN 1.4462 Pipe / Ferritic-Austenitic Pipe |
| Material Type | Duplex Stainless Steel (Austenite-Ferrite, ~50% each) |
| Key Feature | 450 MPa min yield; chloride SCC resistance; PREN ~36; solution annealed; autogenous welded no filler |
| UNS Number | UNS S32205 |
| EN Equivalent | EN 1.4462 (X2CrNiMoN22-5-3) |
| Chemical Composition | 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 |
| Mechanical Properties | Tensile ≥620 MPa / Yield ≥450 MPa / Elongation ≥25% / Hardness ≤290 HBW |
| Heat Treatment | Solution annealed at 1020-1100°C + water quench or air cool |
| Manufacturing Process | Plate/Coil Forming → Automatic Welding (No Filler Metal) → Solution Annealing → Quenching → Sizing → Hydro/NDE Testing |
| Primary Applications | Oil & Gas / Offshore Platforms / Chemical Processing / Desalination / Marine Environments |
| Parameter | Available Options |
|---|---|
| Product Standard | ASTM A790/A790M, ASME SA-790 |
| UNS Equivalent | UNS S32205 |
| Nominal Pipe Size (NPS) | 1/2″ to 24″ (standard); up to 110″ for EFW |
| Wall Thickness | Schedule 5S, 10S, 40S, 80S, XXS per ASME B36.19; custom up to 100mm |
| Length | Single random, double random, or cut-to-length |
| Pipe End | Plain End (PE) / Beveled End (BE) / Threaded |
| Welding Process | Automatic welding, no filler metal added |
| Heat Treatment | Solution annealed at 1020-1100°C + quench |
| Inspection | Hydrostatic Test / Eddy Current or UT / Tension Test / Flattening Test / ASTM A923 Intermetallic Test |
| PREN | ~35-40 |
| Documents | MTC 3.1 / Inspection Reports / Packing List / Heat Number Traceability |
ASTM A790 S32205 duplex welded pipe is specified for applications requiring high strength and resistance to chloride-induced pitting, crevice corrosion, and stress corrosion cracking. Its yield strength (~450 MPa) is more than double that of 316L (~170 MPa), allowing thinner wall sections and lighter piping systems.
Typical applications include:
- Offshore topside and subsea process piping
- Oil and gas production facilities (produced water handling)
- Chemical processing plant piping handling organic acids and chlorides
- Desalination plants (seawater intake and brine systems)
- Pulp and paper bleaching lines
- Heat exchangers and condensers
- FPSO and semi-submersible platforms
Key selection considerations: S32205 is the improved 2205 grade with tighter nitrogen and molybdenum control than S31803, offering more consistent mechanical properties and corrosion resistance. The autogenous welding without filler metal is a key requirement of ASTM A790—for welded pipe with filler metal, ASTM A928 applies instead. Solution annealing and quenching are mandatory to prevent detrimental intermetallic phases (sigma, chi) that severely degrade toughness and corrosion resistance. The recommended service temperature range for duplex 2205 is -40°C to 250°C. Duplex steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures above 300°C.
Shangyou Stainless Steel provides value-added processing including custom cutting, beveling, and end protection for duplex welded pipes.
All pipes 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 A790 S32205? ASTM A790 S32205 is a duplex (ferritic/austenitic) stainless steel pipe grade with 22% chromium and 3% molybdenum, offering high strength and excellent resistance to chloride stress corrosion cracking.
2. What is the difference between S31803 and S32205? S32205 is the improved version of S31803 with tighter composition control (22-23% Cr, 3.0-3.5% Mo, 0.14-0.20% N) for more consistent properties. Both are 2205 duplex grades.
3. What is the UNS number for 2205? UNS S32205.
4. What is the EN equivalent? EN 1.4462 (X2CrNiMoN22-5-3).
5. What mechanical properties does S32205 have? Tensile ≥620 MPa, Yield ≥450 MPa, Elongation ≥25%, Hardness ≤290 HBW.
6. Is filler metal used in welding A790 pipe? No. ASTM A790 requires automatic welding without the addition of filler metal.
7. Is heat treatment required for S32205? Yes, solution annealing at 1020-1100°C followed by water quench or air cool is mandatory.
8. What is the PREN of S32205? ~35-40, indicating excellent pitting resistance.
9. What are typical applications for S32205 pipe? Oil & gas, offshore platforms, chemical processing, desalination, pulp & paper, and marine environments.
10. What temperature range is S32205 suitable for? -40°C to 250°C.
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