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Super Duplex 2205 | Product Overview
Introduction To Super Duplex Stainless Steel 2205
Super Duplex Stainless Steel 2205 is a dual-phase (ferritic-austenitic) stainless steel that combines exceptional corrosion resistance with high strength. It contains approximately 22% chromium, 5–6% nickel, and 3% molybdenum, giving it superior resistance to pitting, crevice corrosion, and stress corrosion cracking compared to conventional austenitic and ferritic stainless steels.
Moksh Tubes & Fittings LLP is a trusted supplier, exporter, importer, and stockist of Duplex Stainless Steel 2205 (UNS S32205 / S31803 / ASTM A182 F51). Our product portfolio includes Pipes, Tubes, Sheets, Plates, Coils, Bars, Pipe Fittings, Flanges, Fasteners, Welding Rods, Wire Mesh, and custom fabricated components.
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Specifications of Duplex Stainless Steel 2205
| Category | Details |
|---|---|
| Grade | Duplex 2205 / UNS S32205 / ASTM A182 F51 |
| Type | Duplex Stainless Steel (Austenite + Ferrite) |
| Available Conditions | Hot Rolled, Cold Drawn, Annealed, Solution Annealed |
| Testing | Tensile, Hardness, PMI, Impact, Corrosion Testing |
| Certification | EN 10204 3.1 / 3.2 |
Chemical Composition of Duplex Stainless Steel 2205
| 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 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.020 |
| Carbon (C) | ≤ 0.030 |
| Iron (Fe) | Balance |
UNS S32205 has tighter nitrogen control than S31803, giving better pitting resistance.
Technical Properties of Duplex Stainless Steel 2205
Physical Properties of Duplex Stainless Steel 2205
| Property | Value |
|---|---|
| Density | 7.80 g/cm³ |
| Melting Point | 1350–1450°C |
| Elastic Modulus | 200 GPa (29,000 ksi) |
| Thermal Conductivity @100°C | 19 W/m·K |
| Specific Heat | 500 J/kg·K |
| Magnetic Response | Slightly Magnetic |
Heat Treatment of Duplex Stainless Steel 2205
| Heat Treatment Process | Temperature Range | Cooling / Procedure |
|---|---|---|
| Solution Annealing | 1020–1100°C | Rapid water quench to restore duplex structure |
| Stress Relieving | 350–450°C | Air cool; short duration only to avoid sigma-phase formation |
| Aging / Precipitation (Not applicable) | — | 2205 cannot be precipitation hardened |
| Hardening | — | Cannot be hardened by heat treatment (only cold working increases hardness) |
| Post-Weld Heat Treatment (PWHT) | — | Not recommended; control heat input during welding |
⚠ Important: Duplex steels must be cooled quickly after heat treatment to prevent formation of sigma phase, which reduces corrosion resistance.
Mechanical Properties of Duplex Stainless Steel 2205
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | ≥ 620 MPa | ≥ 90,000 psi |
| Yield Strength (0.2% Offset) | ≥ 450 MPa | ≥ 65,000 psi |
| Elongation | ≥ 25% | ≥ 25% |
| Hardness | ≤ 94 HRB | ≤ 94 HRB |
| Impact Toughness | Excellent | Excellent |
| PREN (Pitting Resistance) | 35–40 | 35–40 |
Products in Duplex Stainless Steel S31803
Duplex Stainless Steel S31803 is available in a variety of mill forms:
✔
Seamless Pipes
✔
Welded Pipes (ERW & EFW)
✔
Tubes (Capillary, U-Bend)
✔
Sheets & Plates
✔
Coils & Strips
✔
Round Bars, Flat Bars, Hex Bars, Square Bars
✔
Pipe Fittings (Elbows, Tees, Reducers, Caps, Stub Ends)
✔
Flanges (Weld Neck, Slip-On, Blind, Socket Weld, Threaded)
✔
Fasteners (Bolts, Nuts, Screws, Washers, Studs)
✔
Custom Fabricated Components
We supply Duplex Stainless Steel S31803 materials in accordance with the most stringent industry standards:
Uses and Advantages
Excellent resistance to chloride-induced stress corrosion cracking
Superior pitting and crevice corrosion resistance
Twice the yield strength of conventional austenitic stainless steels
Good weldability and formability
High mechanical strength and durability in harsh environments
Applications of Super Duplex Stainless Steel 2205
Super Duplex Stainless Steel 2205 is widely used across multiple industries:
Chemical Processing
Reactors, heat exchangers, and storage tanks for chemical processing equipment.
Oil & Gas Industry
Offshore platforms, risers, subsea equipment, and pipelines.
Marine & Desalination Plants
Seawater systems, offshore structures, and desalination equipment.
Pulp & Paper Industry
Machinery and piping used in pulp and paper production processes.
Pollution Control & Pressure Vessels
Equipment and tanks in corrosive conditions for safe storage and processing.
WHY CHOOSE US?
Duplex Stainless Steel S31803 Price per kg in India
Typical Range: ₹350 – ₹650 per kg
(Price depends on size, form, condition & order volume.)
Request an exact quotation for accurate pricing.
FAQ's
What makes Super Duplex 2205 superior to standard austenitic stainless steel?
It has twice the strength and significantly better resistance to chloride stress corrosion cracking than standard austenitic grades like 304 or 316.
Is Super Duplex 2205 weldable?
Yes, but proper control of heat input and post-weld treatment is essential to maintain corrosion resistance and strength.
Where is Super Duplex 2205 most commonly used?
In offshore oil & gas, desalination plants, chemical processing, and marine applications where corrosion resistance and high strength are critical.
Can Super Duplex 2205 be used in seawater environments?
Yes, it has excellent resistance to seawater corrosion and chloride-induced stress corrosion cracking.
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