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2205 Duplex Stainless Steel 2205 Round Bar Duplex 2205 Rods
311.0 INR/Kilograms
Product Details:
- Grade 2205
- Standard ASTM A276, ASTM A479, UNS S32205 / S31803
- Diameter 10 mm to 300 mm or custom sizes
- Length Typically 3 to 6 meters, customizable
- Application Chemical processing, marine engineering, pulp & paper industry, oil & gas industry, structural and architectural applications
- Processing Annealed & Pickled, Cold drawn, Machined
- Type Round Bar / Rod
- Click to view more
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2205 Duplex Stainless Steel 2205 Round Bar Duplex 2205 Rods Price And Quantity
- 1 Kilograms
- 311.0 INR/Kilograms
2205 Duplex Stainless Steel 2205 Round Bar Duplex 2205 Rods Product Specifications
- Pressure vessels, bridge construction, shafts, fasteners, machine parts
- Black, Polished, Peeled, Bright
- Typically 3 to 6 meters, customizable
- 2205 Duplex Stainless Steel
- Chemical processing, marine engineering, pulp & paper industry, oil & gas industry, structural and architectural applications
- Hot Rolled, Forged
- Round Bar / Rod
- ASTM A276, ASTM A479, UNS S32205 / S31803
- h9, h11, h13 or as per requirement
- 10 mm to 300 mm or custom sizes
- Annealed & Pickled, Cold drawn, Machined
- 2205
- Excellent resistance to pitting and crevice corrosion
- 7.8 g/cm3
- 290 HB
- Good, but requires special techniques
- Cut, plain, beveled, or threaded as required
- 450 MPa
- 620 - 880 MPa
- High, even at sub-zero temperatures
- Hot rolled, peeled, turned, or polished
- Solution Annealed at 1020-1100C, rapid cooling
- Yes, magnetic
- 25%
Product Description
Duplex 2205 Stainless Steel Round Bars & Rods
Duplex 2205 (UNS S31803 / S32205) is the most widely specified and utilized nitrogen-alloyed duplex stainless steel grade in the world. It directly cross-references with European standard W.Nr. 1.4462 (X2CrNiMoN22-5-3) and forging standard ASTM A182 F51 / F60.
The name "Duplex" highlights its mixed microstructure, which contains roughly equal proportions of ferrite (approx. 50%) and austenite (approx. 50%). This dual-phase layout is engineered to capture the best properties of both microstructures: the high yield strength and stress corrosion cracking resistance of ferritic steel, combined with the superior ductility and ease of fabrication found in austenitic stainless steel (like 316L).
Technical Sourcing Formats for 2205 Rods
When procurement teams specify Duplex 2205 round bars, they select different surface finish conditions based on the downstream manufacturing steps:
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Peeled & Bright Turned: The standard industrial condition for CNC machining centers. The mill removes the rough hot-worked skin, providing a bright rod with a clean outer diameter, tight geometric tolerances, and zero surface decarburization.
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Centerless Precision Ground: Processed to strict tolerances (e.g., ISO h8 or h9 limits), yielding an ultra-smooth surface finish. This format is typically required for high-velocity rotating pump shafts, boat propeller shafting, and tight-tolerance valve stems.
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Hot Rolled / Black Forged: Supplied with a dark oxide scale skin directly from the forging hammer or rolling mill. This is the most economical choice for large-diameter blocks that will undergo massive rough milling or subsequent hot forging.
Chemical Profile & Pitting Resistance Index
The exact chemical balance of Duplex 2205 is designed to maintain high resistance to localized corrosion in aggressive environments like marine splash zones, brackish waters, and sour-gas wells. It guarantees a Pitting Resistance Equivalent Number (PREN) consistently greater than 34:
$$text{PREN} = % text{Cr} + 3.3(% text{Mo}) + 16(% text{N})$$
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Chromium (Cr) [22.0% 23.0%]: Forms the primary, self-healing passive chromium-oxide surface film that prevents general corrosion.
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Molybdenum (Mo) [3.0% 3.5%]: Significantly reinforces the passive layer, specifically defending against localized chloride pitting and crevice attack.
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Nickel (Ni) [4.5% 6.5%]: Acts as the primary austenite stabilizer, ensuring the steel maintains high ductility and fracture toughness.
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Nitrogen (N) [0.14% 0.20%]: Enhances interstitial matrix strength and strongly improves resistance to pitting.
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Carbon (C) [$le$ 0.030% max]: Kept to an absolute minimum to prevent the precipitation of chromium carbides during welding, which eliminates the risk of intergranular corrosion.
Mechanical Properties (Solution Annealed Condition)
The 50/50 dual-phase crystal matrix delivers mechanical performance limits that easily outclass standard 300-series stainless steels:
| Mechanical Property | Minimum Specified Value |
| Yield Strength ($R_{p0.2}$) | $ge 450 text{ MPa}$ (Roughly double the baseline yield of 316L stainless) |
| Tensile Strength ($R_m$) | $ge 655 text{ MPa}$ |
| Elongation ($A_5$) | $ge 25%$ |
| Hardness Maximum | 271 HBW (~28 HRC max), ensuring compliance with NACE MR0175 / ISO 15156 boundaries for sour service. |
| Low-Temperature Toughness | Retains high impact energy absorption ($ge 80 text{ J}$) down to $-40^circtext{C}$ or $-50^circtext{C}$. |
Primary Applications for Duplex 2205 Bars
Because Duplex 2205 combines high structural load limits with robust corrosion resistance, these round bars and rods are widely specified across heavy engineering sectors:
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Marine Engineering: High-fatigue rotating drive shafts, propeller shafts, subsea thruster rods, and high-velocity pump impellers.
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Heavy Clamping & Fasteners: High-strength, anti-galling double-bolted piping clamps, pressure-vessel structural studs, and heavy-duty 12-point flange bolts utilized on offshore rigs.
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Oil & Gas Flow Control: Core valve stems, wellhead gate components, downhole chokes, and subsea connectors handling sour process fluids ($H_2S$).
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Process Industries: Chemical mixer shafts, separation rotors, and high-load fasteners operating in pulp bleaching plants or phosphoric acid processing facilities.
Heat Treatment & Thermal Controls
Solution Annealing
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Process Window: Heated uniformly within the range of 1020C to 1100C, followed by an immediate rapid water quench.
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Metallurgical Phase Safety: The rapid quench step is absolutely critical to lock in the balanced 50/50 ferrite-austenite matrix. Machinists and heat-treat operators must strictly avoid slow cooling or allowing the material to dwell within the 600C to 950C zone. Exposure in this window triggers the rapid precipitation of brittle intermetallic phases (such as the Sigma ($sigma$) phase), which severely degrades both the steel's impact toughness and corrosion resistance.
Outstanding Mechanical Strength and Durability
2205 Duplex Stainless Steel round bars boast a yield strength of 450 MPa and tensile strength between 620 and 880 MPa, making them ideal for heavy-duty usage. With high elongation and impact strength, even at sub-zero temperatures, these bars excel in environments where robustness and safety are crucial.
Superior Corrosion Resistance in Challenging Environments
Engineered to withstand severe pitting and crevice corrosion, Duplex 2205 bars and rods are frequently employed in chemical, marine, and offshore industries. Their corrosion-resistant nature ensures reliability and longevity, even in aggressive environments.
Customizable Dimensions and Surface Finishes
The 2205 Duplex Stainless Steel bars come in diameters ranging from 10 mm to 300 mm and customizable lengths between 3 to 6 meters. They are available in finishes such as black, polished, peeled, bright, and can be supplied cut, plain, beveled, or threaded, meeting diverse project requirements.
FAQ's of 2205 Duplex Stainless Steel 2205 Round Bar Duplex 2205 Rods:
Q: How are 2205 Duplex Stainless Steel round bars manufactured?
A: 2205 Duplex round bars are produced using hot rolling or forging techniques, followed by solution annealing at 1020-1100C with rapid cooling. They are then processed to achieve various surface finishes such as hot rolled, peeled, turned, or polished, and tailored to specific end finishes.Q: What are the key applications for Duplex 2205 round bars and rods?
A: These round bars and rods see extensive use in chemical processing, marine engineering, oil and gas industry, pulp and paper production, structural frameworks, bridge construction, and pressure vessels, thanks to their excellent mechanical strength and corrosion resistance.Q: When should I choose Duplex 2205 round bars over traditional stainless steel?
A: Duplex 2205 should be selected when higher strength, superior corrosion resistance (especially against pitting and crevice corrosion), and durability under extreme conditions are required, such as in aggressive chemical or marine environments.Q: Where can Duplex 2205 stainless steel round bars be purchased in India?
A: 2205 Duplex Stainless Steel round bars are available through manufacturers, exporters, dealers, fabricators, suppliers, and traders across India. Many suppliers offer customized sizes, finishes, and prompt delivery to meet specific project needs.Q: What is the process for ensuring proper weldability of Duplex 2205 rods?
A: Although Duplex 2205 exhibits good weldability, it requires special welding techniques, such as using low heat input and controlled interpass temperatures, to maintain corrosion resistance and mechanical properties without causing phase imbalance or embrittlement.Q: What benefits does the magnetic property of Duplex 2205 provide?
A: The magnetic nature of 2205 Duplex Stainless Steel allows for easy handling and detection in automated systems, which can be advantageous during machining, fabrication, and quality control, especially where separation of magnetic and non-magnetic materials is important.Tell us about your requirement
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