Duplex Steel Alloy 2205 Round Bar Overview
Zeon Exports supplies Alloy 2205 Duplex Stainless Steel Round Bars (UNS S31803 / S32205) to industries that demand high strength and superior resistance to chloride-induced corrosion. Backed by large ready stock in Mumbai and export-ready documentation, we deliver precision-finished bars in custom sizes for oil & gas, marine, chemical processing, and desalination applications worldwide.
Alloy 2205 is the world's most widely used duplex stainless steel, combining a balanced austenitic-ferritic microstructure that delivers roughly double the yield strength of standard 316L stainless, along with excellent weldability and toughness.
Its high chromium and molybdenum content, paired with controlled nitrogen, gives it outstanding resistance to pitting and stress corrosion cracking in chloride-rich environments – making it a preferred choice over 316L wherever seawater, brine, or aggressive process chemicals are present.
- Duplex microstructure gives ~2x the strength of standard austenitic stainless
- High resistance to pitting, crevice, and chloride stress corrosion cracking
- Available with full MTC (EN 10204 3.1) and export packaging
Quick Specifications of Duplex Steel Alloy 2205 Round Bar
Key reference specifications for Alloy 2205 Round Bar as typically supplied by Zeon Exports – confirm exact figures against the mill test certificate for your specific order.
| Specification | Detail |
|---|---|
| Material / Grade | Duplex Stainless Steel Alloy 2205 |
| UNS | S31803 / S32205 |
| Werkstoff Number | 1.4462 |
| Standards | ASTM A276, ASTM A479, ASME SA276, ASME SA479 |
| Form | Round Bar |
| Finish | Black, peeled/turned, polished, bright (as specified) |
| Heat Treatment | Solution annealed and water quenched |
| Certification | EN 10204 3.1 Mill Test Certificate |
Equivalent Grades of Alloy 2205
Alloy 2205 is recognized under several closely related international designations. These are comparable specifications, not always exact one-to-one equivalents – confirm the applicable standard for your project.
| UNS | Werkstoff Nr. | EN Steel Name | Common Trade Name | ASTM/ASME Standard |
|---|---|---|---|---|
| S31803 | 1.4462 | X2CrNiMoN22-5-3 | Duplex 2205 | ASTM A276 / A479 |
| S32205 | 1.4462 | X2CrNiMoN22-5-3 | Alloy 2205 / Duplex 2205 | ASME SA276 / SA479 |
Chemical Composition of Alloy 2205
Chemical composition of Alloy 2205 is governed by ASTM A276/A479; permissible ranges can vary slightly by supplier heat and specification revision – always verify against the specific mill certificate.
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 21.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Nitrogen (N) | 0.08 – 0.20 |
| Carbon (C), max | 0.030 |
| Manganese (Mn), max | 2.00 |
| Silicon (Si), max | 1.00 |
| Phosphorus (P), max | 0.030 |
| Sulphur (S), max | 0.020 |
| Iron (Fe) | Balance |
Physical Properties of Alloy 2205 Duplex Steel
General physical properties of Alloy 2205 duplex stainless steel are outlined below. Additional properties such as thermal conductivity or specific heat can be confirmed on request against the applicable material datasheet.
| Property | Value |
|---|---|
| Density | 7.80 g/cm3 |
| Melting Range | Approx. 1420–1460°C (confirm against specific datasheet) |
| Magnetic Behaviour | Ferromagnetic (due to ferrite phase content) |
Mechanical Properties of Duplex Steel Alloy 2205 Round Bar
Minimum mechanical properties for Alloy 2205 Round Bar in the solution-annealed condition, per ASTM A276/A479. Actual values vary by heat and section size – refer to the mill certificate for exact figures.
| Property | Minimum Value |
|---|---|
| Tensile Strength | 620 MPa (90 ksi) |
| Yield Strength (0.2% offset) | 450 MPa (65 ksi) |
| Elongation | 25% |
| Condition | Solution Annealed |
Corrosion Resistance of Alloy 2205 Duplex Steel
- PREN: Alloy 2205 has a Pitting Resistance Equivalent Number (PREN) of approximately 35, placing it well ahead of standard austenitic grades like 316L in aggressive, chloride-bearing environments.
- Pitting Resistance: The combined chromium, molybdenum, and nitrogen content forms a highly stable passive layer, giving strong resistance to localized pitting attack in seawater and brine.
- Crevice Resistance: The duplex microstructure resists crevice corrosion at flange joints, gaskets, and fastener interfaces significantly better than standard 316/316L stainless steel.
- Chloride SCC Resistance: Alloy 2205's duplex structure gives high resistance to chloride stress corrosion cracking, a common failure mode for austenitic stainless in hot chloride service.
Heat Resistance of Alloy 2205 Duplex Steel
Alloy 2205 performs reliably across a broad service temperature range, but duplex grades are generally limited to continuous service below roughly 300°C in most industry guidance, since prolonged exposure above this range can promote embrittling phases in the ferrite. At the low end, it retains good toughness well into sub-zero conditions. For applications running near these thresholds – high-temperature process piping, or cryogenic service – confirm exact limits against the applicable design code (e.g., ASME B31.3) and your project's engineering specification before finalizing material selection.
Key Properties of Duplex Steel Alloy 2205 Round Bar
Beyond corrosion and heat performance, Alloy 2205 Round Bar offers a strong overall property profile for demanding structural and mechanical applications.
- Roughly double the yield strength of standard austenitic stainless steels
- Good weldability using standard duplex-compatible welding procedures
- Solid machinability with appropriate tooling and cutting parameters
- High toughness maintained across a wide temperature range
- Excellent strength-to-weight ratio, allowing thinner sections in design
Benefits of Duplex Steel Alloy 2205 Round Bar
Choosing Alloy 2205 Round Bar from Zeon Exports gives buyers more than just a corrosion-resistant material – it simplifies sourcing and long-term project economics.
- Reduced maintenance and replacement costs over the material's service life
- Full documentation and EN 10204 3.1 traceability with every shipment
- Wide range of finishes and custom cut-to-size options on request
- Reliable, ready stock availability for urgent project timelines
- Export-grade packaging suited for long-distance and offshore delivery
- Single-source supply across bars, plates, pipes, and fittings
Related Products
Explore other Alloy 2205 and Duplex Steel product forms available from Zeon Exports.
Request a Quote for Duplex Steel Alloy 2205 Round Bar
Need Alloy 2205 Round Bar for Your Project? Submit your requirements and our team will get back with sizes, pricing, and delivery timelines.
Call: +91 98205 33105
Email: info@zeonexports.com
Website: www.zeonexports.com
Address: A-7/9, Saboo Building, Ardeshir Dady Cross Lane, Cawasji Patel Tank Road, Mumbai – 400004
Frequently Asked Questions About Duplex Steel Alloy 2205 Round Bar
Common questions from buyers sourcing Alloy 2205 Round Bar.
Q1: What is Alloy 2205 Round Bar?
Ans. It is a duplex stainless steel bar (UNS S31803/S32205) combining high strength with strong corrosion resistance.
Q2: What is the UNS number for Alloy 2205?
Ans. The UNS designations are S31803 and S32205, with Werkstoff number 1.4462.
Q3: What standards apply to Alloy 2205 Round Bar?
Ans. ASTM A276 and ASTM A479 (and ASME SA276/SA479) are the primary governing standards.
Q4: Is Alloy 2205 magnetic?
Ans. Yes, it is ferromagnetic due to its ferrite-phase content, unlike standard austenitic stainless.
Q5: How does Alloy 2205 compare to 316L?
Ans. It offers roughly double the yield strength and significantly better chloride corrosion resistance than 316L.
Q6: What sizes are available?
Ans. Zeon Exports supplies custom sizes and cut-to-length bars – contact us with your specification.
Q7: What certification is provided?
Ans. All bars ship with an EN 10204 3.1 Mill Test Certificate for full traceability.
Q8: Can Alloy 2205 be welded?
Ans. Yes, it has good weldability using duplex-compatible welding procedures and filler materials.
