Duplex 2205 Pipe Fittings (UNS S31803) Manufacturer and Supplier
Duplex 2205 Pipe Fittings UNS S31803 are an excellent combination of strength and corrosion resistance properties, making them a dependable alloy material in various industrial systems. Unlike ordinary stainless steel, duplex steel has a dual-phase structure comprising ferrite and austenite to boost mechanical properties and offer resistance against chloride stress corrosion cracking. This material is used in oil and gas, chemical, heat exchanger, and marine applications. Metinox Overseas provides Duplex 2205 fittings in accurate dimensions and quality for long-lasting service in moderately or highly heated environments.
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Types of Duplex 2205 Pipe Fittings (UNS S31803)
Saf 2205 Duplex Stainless Steel EFW Tube
Saf 2205 Duplex Stainless Steel Condenser Tube
Duplex Steel 2205 Round Tube
Duplex Stainless Steel 2205 Precision Tubes
Duplex Stainless Steel 2205 Gas Tube
Duplex SS 2205 Schedule 40S Seamless Tube
Duplex Alloy 2205 Square Tube
Duplex 2205 Welded Tube
ASTM A789 UNS S32205 Exhaust Tubing
ASTM A789 UNS S31803 Rectangular Tube
ASME SA 789 UNS S32205 ERW Tube
ASME SA 789 UNS S32205 Coiled Tube
ASME SA 789 UNS S31803 Boiler Tube
2205 Duplex Steel Polished Tube
2205 Duplex Stainless Steel Seamless Tube
2205 Duplex SS Capillary Tube
2205 Duplex Heat Exchanger Tube
22 Cr Duplex Steel Schedule 5S Tube
1.4462 Duplex 2205 SCH 40 Seamless Tube
1.4462 Duplex 2205 Instrument Tubing
Specifications of Duplex 2205 Pipe Fittings (UNS S31803)
| Specification Parameter | Details / Value |
|---|---|
| International Specifications | SA 789 alloy 2205, ASTM A789 duplex 2205, A789 gr 2205, ASTM A789 / ASME SA 789, ASTM A928 / ASME SA 928, ASTM A999 / ASME SA 999 |
| Standard Specification | JIS, GB, DS, EN, DTD, DIN, ASME, ASTM, AMS, SAE, AISI, NF, TOCT |
| Standard Tolerances | +/- 0.030 (tolerance may vary depending on grade and thickness) |
| Seamless Tube Size | 15 NB to 150 NB IN; 1/2" OD - 12" OD |
| Welded Tube Size | 1/2" OD - 12" OD; Gauge: 25 SWG - 10 SWG |
| Length & Ends | Up to 30 meters, single random, double random and required length. Ends: plain end, beveled end, threaded, or custom cut lengths. |
| Wall Thickness (WT) | 0.40 mm - 12.70 mm |
| Tube Schedule | 5, 10S, 10, 30, 40S, 40, 80, 80S, XS, 160, XXH |
| Tube SWG & BWG | 10 SWG, 12 SWG, 14 SWG, 16 SWG, 18 SWG, 20 SWG |
| Manufacturing Techniques | EFW, CEW, ERW, LSAW, fabricated, seamless, CDW, redrawn, DOM, welded, seam-welded |
| Material Origin | Indian, European, Korean, Japanese |
| Tube End Types | PBE, BBE, TBE, BE, BSE, BLE, POE / BOE, TOE / BOE, TOE / POE |
| End Finish | Low-burr, burr-free, brushed, trovalised |
| Forms Available | Round, square, oval, rectangular, coil, U shape, hydraulic and honed tubes |
| Delivery Condition | Welded, seamlessly drawn, polished, annealed and pickled, hot finished, bright annealed, cold drawn |
| Dimensional Specs | ANSI / ASME B36.10, B36.19, B2.1 |
| Value Added Services | Cut to size, thread, and groove |
| Shipping Port | Mumbai, India |
| Packaging | Ply wooden boxes, PE fabric bundles, steel strips bundled, plastic bags, standard seaworthy export packing, or as required |
| Standard Marking | Specification, material grade, nominal size, schedule/wall thickness, manufacturing method, heat number, and manufacturer's name/logo. Sample: ASTM A789 UNS S31803 12" NB SCH 40S SEAMLESS HEAT NO. XXXX |
| Applications | Oil tube, gas tube, fluid tube, boiler, and ASTM A789 UNS S32205 heat exchanger tube |
Chemical Composition of Duplex 2205 Pipe Fittings (UNS S31803)
| Element | Composition |
|---|---|
| Cr | 21-23.0% |
| Fe | 50.0% balance |
| Ni | 4.5-6.5% |
| Mn | 2.0% max |
| P | 0.30% max |
| Mo | 2.5-3.5% |
| Si | 1.0% max |
| N | 0.08-0.20% |
| C | 0.030% max |
Mechanical Properties of Duplex 2205 UNS S31803 / S32205 Pipe Fittings
| Density | Melting Point | Yield Strength (0.2% Offset) | Tensile Strength | Elongation |
|---|---|---|---|---|
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi - 80000, MPa - 550 | Psi - 116000, MPa - 800 | 15% |
Equivalent Grades of Duplex 2205 Pipe Fittings (UNS S31803)
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| Alloy 2205 Pipe | 1.4462 / 1.4462 | S31803 / S32205 |
HSN Code of Duplex 2205 Pipe Fittings (UNS S31803)
| Properties | Values |
|---|---|
| HSN Code | 72042190 |
Comparison between S31803 vs S32205 Pipe Fittings
| Parameter | UNS S31803 | UNS S32205 | Industry Practice Insight |
|---|---|---|---|
| Standard Specification | ASTM A182 / A240 / A790 | ASTM A182 / A240 / A790 | Both grades fall under same ASTM specs |
| Chromium (Cr) | 21.0 - 23.0% | 22.0 - 23.0% | S32205 has tighter lower limit for better corrosion resistance |
| Molybdenum (Mo) | 2.5 - 3.5% | 3.0 - 3.5% | Higher minimum improves pitting resistance |
| Nitrogen (N) | 0.08 - 0.20% | 0.14 - 0.20% | S32205 ensures higher strength and SCC resistance |
| Yield Strength | ≥ 450 MPa | ≥ 450 MPa | Mechanical properties are similar |
| Pitting Resistance (PREN) | Approx. 30-33 | Approx. 34-35 | S32205 offers more consistent PREN values |
| Corrosion Resistance | Good | Superior | Due to tighter chemistry control |
| Certification Practice | Often certified | Tested and achieved | Mills typically produce to S32205 chemistry but certify as S31803 for wider acceptance |
| Reason for Dual Certification | Broader compliance | Higher performance | Enables supply flexibility across global projects |
Size Chart of Duplex 2205 Pipe Fittings (UNS S31803)
| Gauge | Outside Diameter Tolerance (mm) | Regular Wall (RW) (mm) | Thin Wall (TW) (mm) | Extra Thin Wall (XTW) (mm) | Ultra Thin Wall (UTW) (mm) |
|---|---|---|---|---|---|
| 30 | 0.304 - 0.317 | 0.064 - 0.089 | - | - | - |
| 29 | 0.330 - 0.342 | 0.064 - 0.089 | - | - | - |
| 28 | 0.355 - 0.368 | 0.076 - 0.102 | - | - | - |
| 27 | 0.406 - 0.419 | 0.089 - 0.115 | 0.064 - 0.089 | - | - |
| 26 | 0.457 - 0.469 | 0.089 - 0.114 | - | - | - |
| 25 | 0.508 - 0.520 | 0.115 - 0.140 | 0.089 - 0.114 | - | - |
| 24 | 0.558 - 0.571 | 0.114 - 0.140 | 0.089 - 0.114 | 0.051 - 0.102 | - |
| 23 | 0.635 - 0.647 | 0.140 - 0.165 | 0.089 - 0.114 | 0.051 - 0.102 | - |
| 22 | 0.711 - 0.723 | 0.140 - 0.165 | 0.096 - 0.121 | 0.077 - 0.102 | 0.051 - 0.102 |
| 21 | 0.812 - 0.825 | 0.140 - 0.165 | 0.102 - 0.127 | 0.051 - 0.102 | - |
| 20 | 0.901 - 0.914 | 0.108 - 0.165 | 0.108 - 0.134 | - | - |
| 19 | 1.054 - 1.079 | 0.166 - 0.216 | 0.102 - 0.140 | 0.070 - 0.108 | - |
| 18 | 1.257 - 1.282 | 0.191 - 0.241 | 0.127 - 0.165 | 0.083 - 0.121 | 0.051 - 0.102 |
| 17 | 1.460 - 1.485 | 0.177 - 0.229 | 0.115 - 0.152 | 0.083 - 0.127 | 0.057 - 0.102 |
| 16 | 1.638 - 1.663 | 0.204 - 0.254 | 0.127 - 0.165 | 0.096 - 0.133 | 0.070 - 0.121 |
| 15 | 1.816 - 1.841 | 0.204 - 0.254 | 0.127 - 0.165 | 0.096 - 0.134 | 0.070 - 0.121 |
| 14 | 2.082 - 2.133 | 0.216 - 0.292 | 0.165 - 0.229 | 0.114 - 0.165 | 0.076 - 0.134 |
| 13 | 2.387 - 2.438 | 0.267 - 0.343 | 0.191 - 0.267 | - | - |
| 12 | 2.743 - 2.749 | 0.267 - 0.321 | - | - | - |
| 11 | 3.023 - 3.073 | 0.293 - 0.368 | 0.216 - 0.292 | - | - |
| 10 | 3.378 - 3.429 | 0.318 - 0.394 | 0.216 - 0.292 | - | - |
Thickness Chart of Duplex 2205 Pipe Fittings (UNS S31803)
| Gauge | Thickness Range (Inch) | Typical Value (Inch) |
|---|---|---|
| 22 | 0.025 - 0.029 | 0.028 |
| 20 | 0.031 - 0.035 | 0.035 |
| 19 | 0.038 - 0.042 | 0.042 |
| 18 | 0.044 - 0.049 | 0.049 |
| 17 | 0.053 - 0.058 | 0.058 |
| 16 | 0.060 - 0.065 | 0.065 |
| 15 | 0.066 - 0.074 | 0.072 |
| 14 | 0.075 - 0.085 | 0.083 |
| 13 | 0.087 - 0.097 | 0.095 |
| 12 | 0.101 - 0.111 | 0.109 |
| 11 | 0.112 - 0.122 | 0.121 |
| 10 | 0.126 - 0.136 | 0.134 |
| 9 | 0.140 - 0.150 | 0.148 |
| 8 | 0.157 - 0.167 | 0.165 |
| 7 | 0.175 - 0.185 | 0.18 |
Wall Thickness Chart of Duplex 2205 Pipe Fittings (UNS S31803)
| Outer Diameter (O.D.) Range (Inches) | Wall Thickness Range (Inches) | O.D. Tolerance (+/- Inches) |
|---|---|---|
| 1/2" to 1" incl. | .025 to .065 | .005 |
| 1/2" to 1" incl. | Over .065 to .134 | .010 |
| 1 to 1-1/2" incl. | .025 to .065 | .008 |
| 1 to 1-1/2" incl. | Over .065 to .134 | .010 |
| 1-1/2" to 2" incl. | .025 to .049 | .010 |
| 1-1/2" to 2" incl. | Over .049 to .083 | .011 |
| 1-1/2" to 2" incl. | Over .083 to .148 | .012 |
| 2" to 2-1/2" incl. | .032 to .065 | .012 |
| 2" to 2-1/2" incl. | Over .065 to .109 | .013 |
| 2" to 2-1/2" incl. | Over .109 to .165 | .014 |
| 2-1/2" to 3-1/2" incl. | .032 to .165 | .014 |
| 2-1/2" to 3-1/2" incl. | Over .165 to .220 | .020 |
| 3-1/2" to 5" incl. | .083 to .165 | .020 |
| 3-1/2" to 5" incl. | Over .165 to .220 | .025 |
Application Uses of Duplex 2205 Pipe Fittings (UNS S31803)
- Oil and gas piping systems
- Chemical processing lines
- Heat exchangers and pressure equipment
- Marine and seawater handling systems
- Boiler, fluid, and gas tube applications
Price Chart of Duplex 2205 Pipe Fittings (UNS S31803)
| Description | Price in India (USD) | Enquiry |
|---|---|---|
| 45 Degree Duplex 2205 Stainless Steel Elbow Pipe Fitting | 1.00 / Piece | Get Quote |
| Stainless Steel Duplex 2205 BW Pipe Fittings Elbow | 1.20 / Piece | Get Quote |
| Duplex 2205 UNS S31803 Eccentric Concentric Reducer | 1.00 / Piece | Get Quote |
| ANSI Forged Pipe Fittings UNS S31803 A182 F51 2205 Duplex Stainless Steel Threaded Outlet | 1.00 / Piece | Get Quote |
| Duplex 2205 BW Pipe Fittings Elbow | 2.50 - 50.00 / Piece | Get Quote |
| 2205 Duplex Stainless Steel Equal Tee | 1.00 / Piece | Get Quote |
| Duplex Stainless Steel 2205 Stub End | 1.00 - 15.00 / Piece | Get Quote |
| 90D SAF2205 Duplex 2205 Seamless Stainless Steel DN50 Elbow | 1.00 / Piece | Get Quote |
| LR SR ASME B16.9 Factory-Made Duplex Stainless Steel 2205 S31803 90 Degree Elbow | 1.00 / Piece | Get Quote |
| S31803 (2205, 00Cr22Ni5Mo3) Pipe Elbows | 0.50 / Piece | Get Quote |
Note: Prices for Duplex 2205 Pipe Fittings (UNS S31803) are indicative and may change based on market fluctuations and raw material costs.
Frequently Asked Questions
Duplex 2205 pipe fittings are high-strength, corrosion-resistant components used to connect pipes in demanding environments.
UNS S31803 is a duplex stainless steel grade with a mixed ferrite-austenite structure, offering strength and corrosion resistance.
Duplex 2205 has higher strength and better corrosion resistance than standard austenitic stainless steels like 304 or 316.
It is used for its excellent resistance to corrosion, high pressure handling, and long service life in harsh conditions.
Yes, Duplex 2205 is generally better in terms of strength and resistance to chloride stress corrosion cracking.
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