2205 duplex stainless (UNS S32205) has a roughly equal ferrite/austenite structure. Yield strength is about twice that of 316L and PREN is around 35, with excellent chloride stress-corrosion-cracking and pitting resistance, making it a mainstay for marine, chemical and oil and gas service.
As a manufacturer and global exporter of special alloys since 2012, Shanghai Hangbo Alloy Group Co., Ltd. supplies Duplex Stainless Steel 2205 as round bars (φ2–600 mm, up to 12 m), plates & sheets (0.5–100 mm thick, up to 2500 mm wide), seamless tubes & pipes (φ6–630 mm OD, 0.5–40 mm wall), flanges & pipe fittings (Class 150–2500, DN15–DN1200), forgings & rolled rings (up to 7500 kg, 3500 mm OD) — all with EN 10204 3.1 certified material test reports.
Duplex Stainless Steel 2205 Chemical Composition (wt%)
| Element | Content (wt%) | Element | Content (wt%) |
|---|---|---|---|
| Fe (铁) | Balance | N (氮) | 0.14–0.20 |
| Cr (铬) | 22.0–23.0 | Mn (锰) | ≤ 2.00 |
| Ni (镍) | 4.50–6.50 | Si (硅) | ≤ 1.00 |
| Mo (钼) | 3.00–3.50 | C (碳) | ≤ 0.030 |
Duplex Stainless Steel 2205 Mechanical Properties
| Property | Value |
|---|---|
| Tensile strength (Rm) | ≥ 620 MPa |
| Yield strength (Rp0.2) | ≥ 450 MPa |
| Elongation (A) | ≥ 25 % |
| Hardness | ≤ 293 HB |
| Density | 7.80 g/cm³ |
| Melting range | 1385–1443 °C |
| Thermal conductivity | 19.0 W/m·K |
| Young's modulus | 190 GPa |
| Max service temperature | 300 °C |
Key Advantages
- Yield ≥ 450 MPa, about twice 316L
- Much better chloride SCC resistance than 304/316
- PREN around 35 — strong pitting and crevice resistance
- Low nickel content makes cost less sensitive to nickel prices
Relevant Standards
- ASTM A276
- ASTM A240
- ASTM A790
- ASTM A182
- UNS S32205
Typical Applications
- Offshore platforms and subsea pipelines
- Chemical vessels and heat exchangers
- Oil and gas transport and sour gas piping
- Desalination and effluent treatment
- Pulp digesters and bleaching equipment
Why Buy from Hangbo Alloy?
- Factory-direct manufacturer — founded 2012, headquartered in Shanghai Qingpu
- Full product range — bar, plate, sheet, strip, tube, forging, welding wire, flanges and machined parts
- Certified quality — ISO 9001:2015, GB/T 19001-2016, GJB 9001C-2017, EN 10204 3.1 mill test certificates with third-party inspection (SGS / BV / TUV) available on request
- Complete mill documentation — chemical analysis, mechanical test, ultrasonic test (UT), hardness and grain-size reports with every shipment
Contact Us — Shanghai Hangbo Alloy Group Co., Ltd.
Shanghai Hangbo Alloy Group Co., Ltd.
📍 No. 388 Songhuang Road, Qingpu District, Shanghai, China
📞 Tel / WhatsApp: +86 15618279078
✉️ Email: demi@nickel-alloy.com
🕒 Available 24 hours a day, 7 days a week — enquiries answered around the clock.
Send your drawing or enquiry (grade, form, size, quantity, standard) for a same-day quotation.
Frequently asked questions
What is the service temperature limit of 2205 duplex?
2205 is generally limited to −50 to 300 °C. Long-term exposure between 300 and 525 °C precipitates sigma phase, sharply reducing toughness and corrosion resistance, while below −50 °C the ferrite phase risks ductile-to-brittle transition. For high-temperature service use 316H, 800H or a nickel alloy.
How do I choose between 2205 and 2507 super duplex?
2507 (S32750) contains 25% Cr, 4% Mo and 0.27% N with PREN around 40–42 and yield near 550 MPa — better corrosion resistance and strength than 2205 at roughly 30–50% higher price. Choose 2507 for high chloride, higher temperature or extended-life service; 2205 is adequate for normal seawater and chemical duties.
What forms and sizes are available?
We supply Duplex Stainless Steel 2205 as round bars (φ2–600 mm, up to 12 m), plates & sheets (0.5–100 mm thick, up to 2500 mm wide), seamless tubes & pipes (φ6–630 mm OD, 0.5–40 mm wall), flanges & pipe fittings (Class 150–2500, DN15–DN1200), forgings & rolled rings (up to 7500 kg, 3500 mm OD). Custom lengths, tolerances and machining to drawing are available on request.
What is the MOQ and lead time?
MOQ is flexible — trial orders from a single piece are welcome. Stock sizes ship in 3–7 days; custom forgings and machined parts typically 15–35 days depending on quantity and process.
Can you provide third-party inspection and shipping to my port?
Yes. SGS / BV / TUV or your nominated inspector can witness all tests before shipment. Full export documentation is provided, and we ship worldwide by sea or air on FOB, CIF or DDP terms.