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ASTM A928 S32205 Duplex Stainless Steel EFW Pipe Class 1 with Filler Metal for Corrosive 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 A928 S32205 duplex stainless steel EFW pipe for global EPC contractors, offshore engineers, chemical processors, and pipeline fabricators requiring electric-fusion-welded duplex piping with filler metal addition for corrosive service. Produced to ASTM A928/A928M, this specification covers electric-fusion-welded ferritic/austenitic (duplex) steel pipe made with addition of filler metal.
ASTM A928 is the standard specification specifically for duplex stainless steel pipe welded with filler metal——a critical distinction from ASTM A790, which requires autogenous welding without filler metal for seamless and welded pipe. The addition of filler metal is essential for achieving proper weld chemistry and mechanical properties in thicker-wall and larger-diameter duplex piping, typically using over-alloyed fillers like ER2209 to compensate for nitrogen loss during welding. The specification covers five classes (Class 1 through Class 5) that define welding passes and radiographic examination requirements. S32205 (2205) 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. Heat treatment shall be performed after welding and in accordance with specified temperature and quench conditions.
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Dimension |
Specification |
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Product Name |
ASTM A928 S32205 Duplex Stainless Steel EFW Pipe |
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Product Alias |
2205 EFW Pipe / Filler Metal Welded Duplex / UNS S32205 Pipe / EN 1.4462 Pipe / Class 1 Duplex Pipe |
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Material Type |
Ferritic-Austenitic (Duplex) Stainless Steel (EFW with Filler Metal) |
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Key Feature |
EFW welded with filler metal; Class 1/3/5; 22% Cr, 3% Mo, N alloyed; 450 MPa yield; PREN ~35; suitable for chloride environments |
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UNS Number |
UNS S32205 |
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EN Equivalent |
EN 1.4462 (X2CrNiMoN22-5-3) |
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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 |
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Mechanical Properties |
Tensile ≥620 MPa / Yield ≥450 MPa / Elongation ≥25% |
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Heat Treatment |
Solution annealed at 1870-2010°F [1020-1100°C] + air or water quench |
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PREN |
~35-40 |
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Manufacturing Process |
Plate Forming → EFW Welding with Filler Metal (SAW/GTAW) → Heat Treatment → Sizing → RT/Hydro Testing |
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Primary Applications |
Chemical Processing / Oil & Gas / Offshore Platforms / Heat Exchangers / Desalination / Marine Environment |
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Parameter |
Available Options |
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Product Standard |
ASTM A928/A928M, ASME SA-928 |
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UNS Equivalent |
UNS S32205 |
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Nominal Pipe Size (NPS) |
1/8″ to 48″ (DN6 to DN1200); large diameter EFW standard |
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Wall Thickness |
Schedule 5S, 10S, 40S, 80S per ASME B36.19; custom up to 40mm |
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Length |
Single random (4-7m), double random, or cut-to-length |
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Pipe End |
Plain End (PE) / Beveled End (BE) |
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Class Options |
Class 1: Double-welded, filler metal all passes, 100% RT; Class 2: Double-welded, no RT; Class 3: Single-welded, 100% RT; Class 4: Single-welded, inside pass may be without filler, 100% RT; Class 5: Double-welded, spot RT |
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Heat Treatment |
Solution annealed at 1020-1100°C + quench (mandatory) |
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Recommended Filler Metal |
ER2209 (AWS A5.9) |
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Inspection |
Transverse Tension Test / Transverse Guided-Bend Test / Hydrostatic Test / Nondestructive Electric Test / 100% RT (Class 1) |
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Documents |
MTC 3.1 / Inspection Reports / Packing List / Heat Number Traceability |
ASTM A928 S32205 EFW pipe is specified for large-diameter corrosive service applications where filler metal addition is required to ensure weld seam integrity and corrosion resistance.
Typical applications include:
- Chemical and petrochemical process piping (large bore)
- Oil and gas production and refining systems
- Offshore platform topsides and subsea piping
- Desalination plants (seawater intake and brine systems)
- Heat exchangers and condensers
- Pulp and paper bleaching lines
- Marine and coastal infrastructure
Key selection considerations: Choose ASTM A928 over ASTM A790 when filler metal addition is necessary for weld integrity——this is particularly important for thicker wall pipe and applications requiring enhanced weld properties. Class 1 (double-welded, 100% RT) is standard for critical process piping. Heat input must be controlled (typically 0.5-2.5 kJ/mm) to maintain the 40-60% ferrite balance in the weld zone. Recommended filler metal is ER2209 to match the corrosion resistance and mechanical properties of S32205. S32205 offers more than double the yield strength of 316L (450 vs 170 MPa), allowing thinner wall sections. Maximum service temperature is approximately 300°C; above this, sigma phase embrittlement can occur. The PREN value (~35-40) indicates superior pitting resistance compared to 316L (~24).
Shangyou Stainless Steel provides value-added processing including custom cutting, beveling, and end protection for EFW pipes.
All pipes are packed with export-standard protection including protective end caps, steel strapping, waterproof wrapping, and steel frames or wooden pallets.
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 A928?
ASTM A928 is the standard specification for electric-fusion-welded ferritic/austenitic (duplex) stainless steel pipe made with addition of filler metal, suitable for corrosive service.
2. What is the difference between ASTM A928 and ASTM A790?
ASTM A790 requires autogenous welding without filler metal; ASTM A928 specifically requires filler metal addition during welding. A928 is typically used for larger diameter and thicker wall duplex pipes.
3. What classes are available under ASTM A928?
Class 1: Double-welded, 100% RT; Class 2: Double-welded, no RT; Class 3: Single-welded, 100% RT; Class 4: Single-welded, inside pass may be without filler, 100% RT; Class 5: Double-welded, spot RT.
4. Which ASTM A928 class is most common?
Class 1 (double-welded with 100% RT) is standard for critical process piping.
5. What are the UNS numbers for 2205?
UNS S32205 (improved version) and UNS S31803.
6. 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.
7. What is the heat treatment requirement for A928 S32205?
Solution annealing at 1020-1100°C [1870-2010°F] followed by air or water quench.
8. What filler metal is recommended for S32205 welding?
ER2209 (AWS A5.9) is the recommended filler metal.
9. What is the PREN of S32205?
~35-40, indicating excellent pitting resistance.
10. What temperature range is S32205 suitable for?
Maximum service temperature ~300°C; prolonged use above this temperature may cause sigma phase embrittlement.
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Need ASTM A928 S32205 duplex stainless steel EFW pipe for large-diameter chemical, offshore, or oil & gas applications? Send requirements including grade, class (1/3/5), NPS/wall thickness/length, end finish, quantity, and service conditions.
Shangyou Stainless Steel provides custom sizes, processing, and export solutions for global B2B customers.
