S32205 Duplex Stainless Steel Tube
ASTM/ASME: S32205 (UNS:S32205 EN/DIN: 1.4462) is a material with well-balanced performance and excellent cost-effectiveness. It provides significantly higher strength and resistance to chloride stress corrosion than standard austenitic stainless steels such as 316L without significantly increasing costs. For applications facing corrosion problems (especially pitting and stress corrosion) but unable to afford the high costs of super duplex stainless steel or nickel-based alloys, S32205 is an ideal and reliable choice.
Applications:
Oil and Gas Industry: Subsea pipelines, wellheads, pressure vessels, process piping.
Chemical and Petrochemical Processing: Heat exchangers, reactors, storage tanks, pipelines transporting chloride-containing media.
Oil and Gas Industry: Desalination units, equipment in acidic environments.
Pulp and Paper Industry: Distillers, bleaching equipment.
Marine and shipbuilding industry: Seawater desalination systems, pumps, valves, propeller shafts.
Environmental and energy: Flue gas desulfurization (FGD) systems, wastewater treatment equipment.
Why Choose Our S32205 Stainless Steel Tubes?
S32205 stands out by combining the most desirable properties of both austenitic and ferritic stainless steels, offering a superior performance solution for demanding applications.
High Strength & Lightweight Design
With a yield strength (≥450 MPa) more than double that of conventional 304/316L stainless steels, it enables the use of thinner walls. This translates into significant weight reduction and material savings for your structures and equipment.
Good Weldability
S32205 possesses good weldability. To preserve the corrosion resistance and mechanical properties of the weld zone, it is essential to use matching filler metals (such as ER2209) and follow specific welding procedures.
Stable Thermal Properties
Its low thermal expansion coefficient, similar to carbon steel, and high thermal conductivity make it more dimensionally stable than standard austenitic steels in heat exchange applications, reducing thermal stress.
Excellent Wear & Fatigue Resistance
The robust dual-phase microstructure provides enhanced resistance to abrasion and fatigue, contributing to a longer service life and reduced maintenance for dynamic components.
Exceptional Corrosion Resistance
It offers outstanding resistance to Chloride Stress Corrosion Cracking (SCC), a key failure mode for 316L in chloride-containing environments, making it a game-changer for such applications.
Its high Pitting Resistance Equivalent Number (PREN ≥ 35) ensures excellent resistance to pitting and crevice corrosion, even in aggressive media like seawater and chemical process streams.
| Chemical Composition (%) | ||
| Element | Content (%) | |
| Molybdenum (Mo) | 3.0-3.5 | |
| Chromium (Cr) | 22.0-23.0 | |
| Nickel (Ni) | 4.5-6.5 | |
| Manganese (Mn) | ≤2.00 | |
| Carbon (C) | ≤0.03 | |
| Silicon (si) | ≤1.00 | |
| Phosphorus (P) | ≤0.03 | |
| Sulfur (s) | ≤0.02 | |
| Nitrogen (N) | 0.14-0.20 | |
| Key Emphasis: The precise control of Nitrogen (N) is particularly critical. It is the key element that ensures a balanced 50/50 austenite-ferrite microstructure, significantly increases the yield strength, and dramatically enhances resistance to pitting corrosion. Together, Cr, Mo, and N deliver the signature "duplex advantage." | ||
| Mechanical Properties (Solution Annealed) | ||
| Property | Value | |
| Tensile strength | ≥655 Mpa | |
| 0.2% Yield strength | ≥485 Mpa | |
| Elongation A5 | ≥25% | |
Our S32205 Steel Tube & Pipe Products
We are committed to providing the right S32205 duplex stainless steel solution for your specific pressure, corrosion, and budget requirements. Our dedication to excellence ensures you receive tubes that deliver maximum reliability and value.
Seamless Tubes (SMLS)
Ideal for high-pressure and high-reliability critical applications.
Welded Tubes
A cost-effective choice for large diameters and medium-to-low pressure services.
Full Standard Compliance
Certified to ASTM A789/A790, A928, EN 10216-5, and GB/T 21833.
Comprehensive Size Range
Outer Diameter from a few millimeters to several meters, available in thin to thick walls.
Applications of S32205 Stainless Steel Tube
Thanks to its exceptional combination of high strength and superior corrosion resistance, S32205 tubing is the material of choice across a wide range of demanding industries.
Oil & Gas
Subsea pipelines, oil & gas transmission lines, heat exchanger tubes, process piping.
Key Advantage: Specially suited for harsh "sour service" environments with high concentrations of chlorides, CO₂, and H₂S.
Chemical & Petrochemical
Reactors, distillation columns, heat exchangers, and process piping.
Key Advantage: Provides excellent resistance to a wide range of corrosive acids, alkalis, and chemical solvents.
Marine & Desalination
Seawater cooling systems, desalination plant piping, shipboard piping systems.
Key Advantage: Offers outstanding resistance to pitting and crevice corrosion in high-chloride seawater.
Energy & Environmental Protection
Flue Gas Desulfurization (FGD) systems, wastewater treatment systems, nuclear auxiliary systems.
Key Advantage: Withstands corrosive flue gas condensates and aggressive chemical treatments.
Pulp & Paper Industry
Digesters, bleach plants, and other equipment.
Key Advantage: Resists corrosion from chlorides and oxidizing bleaching agents.
Professional Fabrication Guidelines
-
Cutting
More >>+We recommend using waterjet cutting for clean and efficient results. If abrasive cutting wheels must be used, ensure dedicated stainless steel wheels are employed to prevent contamination.
-
Forming & Bending
More >>+S32205 has a strong tendency to work-harden during cold working processes. This may require greater power for forming and can necessitate an intermediate annealing stage for complex shapes to restore workability and prevent cracking.
-
Welding (Critical Process)
More >>+Welding is a focal point for maintaining material integrity.
Filler Metal: It is essential to use low-carbon, matching duplex stainless steel filler metals, such as ER2209.
Procedure: Strictly control heat input and interpass temperature (typically recommended to be < 150°C / 302°F). This prevents excessive precipitation of detrimental phases in the critical temperature range.
Post-Weld Treatment: Solution annealing is generally recommended after welding to dissolve any harmful precipitates and restore optimal corrosion resistance in the heat-affected zone (HAZ).
-
Service Temperature
More >>+Avoid prolonged exposure to the temperature range of 425°C to 850°C (797°F to 1562°F). Extended time in this range can lead to the precipitation of brittle intermetallic phases (such as Sigma phase), which significantly reduces toughness and corrosion resistance.
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Have specific technical questions about S32205 tubes for your application? Need a competitive quote with fast delivery?
Contact our specialists today for free, no-obligation consultation. We provide detailed product information, technical data, and tailor the best solution to meet your exact performance and budget requirements.
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E-mail： jimmy.steel@gaoshengpipe.com
