Duplex 2205 Pipe ASTM A789/A790 NACE MR0175 50/50 Austenite-Ferrite Duplex Stainless Steel Pipe
Duplex 2205 Pipe Silicon Alloy Steel Duplex Stainless Steel Pipe For Chemical Processing
Material Description
Duplex 2205 (UNS S32205 / S31803) is a nitrogen-alloyed duplex stainless steel with an approximately 50/50 austenite–ferrite structure.
It offers:
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About twice the yield strength of 304L/316L
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High resistance to pitting, crevice corrosion and chloride SCC
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Reliable performance in chloride-bearing, mildly sour and mixed acid/alkali chemical media
This makes Duplex 2205 pipe a strong, corrosion-resistant, and cost-effective choice for demanding chemical-processing and offshore systems.
Specifications
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Grades / Designations:
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UNS: S32205, S31803
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EN: 1.4462 / X2CrNiMoN22-5-3
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JIS: SUS329J3L
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GB: 022Cr22Ni5Mo3N / S22253
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Product Forms:
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Seamless and welded duplex stainless steel pipe and tube
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Supply condition: solution-annealed and pickled, cold- or hot-finished
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Main Features
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High strength – Rp0.2 ≥ 450 MPa, Rm ≥ 620 MPa, allowing thinner walls at the same design pressure.
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Excellent corrosion resistance – high PREN, strong resistance to pitting, crevice corrosion and chloride SCC.
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Good weldability – suitable for standard welding processes when heat input and interpass temperature are properly controlled.
Our Advantages
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Better than 316L in chlorides
We support material selection and wall-thickness calculations (2205 vs 316L) to show clear benefits in strength, weight and service life. -
Sour and aggressive service capability
Pipes can be supplied to meet NACE MR0175 / ISO 15156 and relevant project requirements, including SSC/HIC testing when specified. -
Engineering and project support
Assistance with WPS/PQR for Duplex 2205, NDE and PMI control, plus customized dimensions, lengths and complete QA/ITP documentation for chemical-processing projects.
Chemical Composition
| Grade / System | Designation | C max | Si max | Mn max | P max | S max | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|---|
| ASTM / ASME | UNS S32205 (A789/A790) | 0.03 | 1.00 | 2.00 | 0.03 | 0.02 | 21–23 | 4.5–6.5 | 2.5–3.5 | 0.08–0.20 |
| ASTM / ASME | UNS S31803 (A789/A790) | 0.03 | 1.00 | 2.00 | 0.03 | 0.02 | 21–23 | 4.5–6.5 | 2.5–3.5 | 0.08–0.20 |
| EN | 1.4462 / X2CrNiMoN22-5-3 | 0.03 | 1.00 | 2.00 | 0.035 | 0.015 | 21–23 | 4.5–6.5 | 2.5–3.5 | 0.10–0.22 |
| JIS | SUS329J3L | 0.03 | 1.00 | 2.00 | 0.04 | 0.03 | 21–24 | 4.5–6.5 | 2.5–3.5 | 0.08–0.20 |
| GB | 022Cr22Ni5Mo3N / S22253 | 0.03 | 1.00 | 2.00 | 0.03 | 0.015 | 21–23 | 4.5–6.5 | 2.5–3.5 | 0.08–0.20 |
Mechanical Properties
| Grade / System | Product / Reference | Rp0.2 (MPa) | Rm (MPa) | A (%) | Hardness (max) |
|---|---|---|---|---|---|
| UNS S32205 | Seamless / welded pipe – ASTM A789/A790 | 450 | 620 | 25 | 32 HRC ≈ 290 HBW |
| UNS S31803 | Seamless pipe – ASTM A789 | 450 | 620 | 25 | 290 HBW |
| EN 1.4462 | Bar / section – EN 10088-3 (+AT) | 450 | 650 | 25 | ~270 HBW |
| SUS329J3L | Hot-rolled plate – JIS G 4304 | 450 | 620 | 18 | 302 HBW, 32 HRC |
| 022Cr22Ni5Mo3N | Forging/pipe – NB/T 47010 / GB/T 21833 | 450 | 620 | 25 | HBW not specified |
Standards
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ASTM / ASME: ASTM A789, ASTM A790, ASTM A928, ASME SA789, SA790
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EN: EN 10216-5, EN 10217-7, EN 10088-3
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GB / NB: GB/T 21833, GB/T 21832, GB/T 12770, GB/T 12771, NB/T 47010
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JIS: JIS G 4303 / 4304 / 4305 / 4317, JIS G 3459, JIS G 3463
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GOST: GOST 5632
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Corrosion / Sour: NACE MR0175 / ISO 15156
Application Fields
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Chemical and petrochemical process piping and headers
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Heat-exchanger and condenser tubes with seawater or high-chloride cooling water
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Columns, absorbers and scrubbers in refineries and chemical plants
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Fire-water, utility-water, brine and seawater lines in coastal and offshore facilities
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Desalination, power-plant FGD, and pulp-and-paper systems where high strength and SCC resistance are required.
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,
it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
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