Duplex Steel UNS S32205 Buttweld Fittings
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Duplex Steel UNS S32205 Buttweld Fittings are high-strength, corrosion-resistant components made from a balanced mix of austenitic and ferritic stainless steel. Midland Alloys, a reliable UNS S31803 fittings manufacturer in Mumbai, India, offers a full range of ASME B16.9 duplex 2205 fittings, crafted to meet international standards and demanding service conditions. Known for their durability and excellent resistance to stress corrosion and pitting. The 2205 concentric reducer fittings are widely used to ensure secure, leak-free connections. These fittings are perfect for the offshore, marine, and chemical processing sectors. There are several varieties, including caps, reducers, tees, and elbows.
Benefits of ASME B16.9 duplex 2205 fittings
- Corrosion Resistance: Excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking.
- High Strength and Durability: Higher mechanical strength than standard austenitic stainless steels, ensuring long-term performance under pressure.
- Weldability and Fabricability: Good weldability and ease of fabrication allow for efficient installation and customization.
- Cost-Effectiveness: Combines strength and corrosion resistance, reducing material thickness and overall project cost.
Duplex S32205 Buttweld Pipe Fittings vs Other Grades
Duplex S32205 Buttweld Pipe Fittings offer improved performance over Duplex Steel UNS S31803 fittings, despite their similar composition. Although both grades have strong corrosion resistance and austenitic-ferritic microstructures, S32205’s tightly regulated nitrogen concentration increases strength and resistance to pitting and stress corrosion cracking. This makes S32205 a more reliable choice for demanding environments. In applications where long-term durability and mechanical performance are critical, S32205 fittings provide a more stable and consistent solution compared to standard S31803.
Specification of Duplex Steel UNS S32205 Buttweld Fittings
Duplex Steel UNS S32205 Buttweld Fittings conform to international standards for dimensions, wall thickness, and tolerances. These fittings support seamless integration in duplex stainless steel piping systems used in high-pressure and corrosive conditions.
Below are the key specifications of Duplex Steel UNS S32205 Buttweld Fittings:
Seamless Butt Weld Fittings: 1/2" - 10" Welded Butt Weld Fittings: 1/2" - 48"
ASTM A815 / ASME SA815
Forge, Cast, Push, Press, etc.
90 Deg. Elbow, 45 Degree Elbow, LR/SR Elbow, Reducers, Tee, Cross, Bends, U bend, 180 Deg Bend, End Cap, Lap-joint Stub End
ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Plain End, Beveled End, Treaded
SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75
Seamless / Welded / Fabricated
Type of Duplex Steel UNS S32205 Buttweld Fittings
Duplex Steel UNS S32205 Buttweld Fittings are properly crafted components designed to connect, redirect or terminate flow in duplex piping systems. Known for their strength and outstanding resistance to corrosion these fittings are built to withstand both high pressure and harsh environments with ease. They come in a variety of configuration to accommodate different pipeline layouts and flow needs ensuring they fit smoothly into complex process systems.
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Elbow (90°, 45°, Long Radius, Short Radius)Modifies the pipeline's flow direction at predetermined angles with regulated radii.
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Tee (Equal Tee, Reducing Tee)Adjusts the size of the main and branch lines to split or combine flow at 90° intersections.
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A reducer (eccentric or concentric)joins pipes with varying diameters while preserving flow offset or alignment.
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stub endIn non-permanent piping configurations, the stub end (long or short) connects to lap joint flanges for disassembly.
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Return Bends (180° bend)Redirects flow by 180 degrees, allowing the pipeline to reverse direction.
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Cross (Equal Cross, Reducing Cross)Provides multidirectional flow by joining four pipes at right angles.
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pipe capTo stop flow or pressure, an end cap also known as a pipe cap, seals the pipe's open end.
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Bend (3D, 5D, Custom Radius)This tool uses predefined or custom radii to gradually change the direction of pipelines.
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nipplesShort pipe segments called "nipples" (also known as "barrel" or "swage") are used to join two fittings or pipes.
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Collar / CouplingLinks two pipe sections in a straight run with a secure and leak-free joint.
Technical Details & Delivery Condition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 – 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
In demanding environments the mechanical characteristics of Duplex Steel UNS S32205 guarantee strength and structural dependability during installation and maintenance.
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| S32205 | 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
The following table shows equivalent grades across different international standards and designations.
Below is a sample Duplex Steel UNS S32205 Buttweld Fittings weight chart:
| STANDARD | WERKSTOFF NR. | UNS |
| Duplex 2205 | 1.4462 | S32205 |
| Products | Size | |
| ASTM A815 Duplex Steel Elbow – Long Radius | ASTM A815 Duplex Steel Stub Ends | Sizes 1/2″ – 48″ |
| ASTM A815 Duplex Steel Elbow – Short Radius | ASTM A815 Duplex Steel Cross | |
| ASTM A815 Duplex Steel Reducing Elbow | ASTM A815 Duplex Steel Reducing Cross | |
| ASTM A815 Duplex Steel 45° Elbow | ASTM A815 Duplex Steel Tees | |
| ASTM A815 Duplex Steel Fabricated Tee | ASTM A815 Duplex Steel End Cap | |
| ASTM A815 Duplex Steel Reducer | ASTM A815 Duplex Steel Coupling | |
| ASTM A815 Duplex Steel Concentric Reducer | ASTM A815 Duplex Steel Pipe Nipple | |
| ASTM A815 Duplex Steel Eccentric Reducer | ASTM A815 Duplex Steel 5D Elbow | |
| ASTM A815 Duplex Steel 3D Elbow | ASTM A815 Duplex Steel Welded Pipe Fittings | |
Duplex & Super Duplex Steel Buttweld Fittings Grades We Offer
Duplex Steel UNS S32205 Buttweld Fitting Schedule
| NB | OD | SCH XXS | SCH 80S | SCH 5S | SCH 160S | SCH 10S | SCH 40S | |||||||
| mm | in. | mm | WT (mm) | Weight (kg/m) | WT (mm) | Weight (kg/m) | Weight (kg/m) | WT (mm) | Weight (kg/m) | WT (mm) | WT (mm) | Weight (kg/m) | WT (mm) | Weight (kg/m) |
| 10 | 3/8 | 17.1 | – | – | 3.20 | 1.10 | 0.490 | 1.24 | – | – | 1.65 | 0.63 | 2.31 | 0.845 |
| 25 | 1 | 33.4 | 9.09 | 5.45 | 4.55 | 3.24 | 1.30 | 1.65 | 4.24 | 6.35 | 2.77 | 2.09 | 3.38 | 2.50 |
| 150 | 6 | 168.3 | 21.95 | 79.22 | 10.97 | 42.7 | 11.32 | 2.77 | 67.56 | 18.2 | 3.40 | 13.84 | 7.11 | 28.3 |
| 15 | 1/2 | 21.3 | 7.47 | 2.55 | 3.75 | 1.62 | 0.800 | 1.65 | 1.94 | 4.75 | 2.11 | 1.00 | 2.77 | 1.27 |
| 40 | 1 1/2 | 48.3 | 10.16 | 9.54 | 5.08 | 5.41 | 1.91 | 1.65 | 7.25 | 7.14 | 2.77 | 3.11 | 3.68 | 4.05 |
| 32 | 1 1/4 | 42.2 | 9.70 | 7.77 | 4.85 | 4.47 | 1.65 | 1.65 | 5.61 | 6.35 | 2.77 | 2.70 | 3.56 | 3.38 |
| 50 | 2 | 60.3 | 11.07 | 13.44 | 5.54 | 7.48 | 2.40 | 1.65 | 11.1 | 8.74 | 2.77 | 3.93 | 3.91 | 5.44 |
| 600 | 24 | 609.6 | – | – | 30.96 | 442.08 | 82.47 | 5.54 | 808.22 | 59.54 | 6.35 | 94.45 | 17.48 | 255.41 |
| 65 | 2 1/2 | 73.0 | 14.2 | 20.39 | 7.01 | 11.4 | 3.69 | 2.11 | 14.9 | 9.53 | 3.05 | 5.26 | 5.16 | 8.63 |
| 80 | 3 | 88.9 | 15.24 | 27.65 | 7.62 | 15.2 | 4.51 | 2.11 | 21.3 | 11.1 | 3.05 | 6.45 | 5.49 | 11.30 |
| 300 | 12 | 323.9 | 25.40 | 186.97 | 12.7 | 132.0 | 31.25 | 3.96 | 238.76 | 33.32 | 4.57 | 36.00 | 9.52 | 73.88 |
| 3 | 1/8 | 10.3 | – | – | 2.41 | 0.47 | 0.276 | 1.24 | – | – | 1.24 | 0.28 | 1.73 | 0.37 |
| 100 | 4 | 114.3 | 17.12 | 41.03 | 8.56 | 22.3 | 5.84 | 2.11 | 33.54 | 13.49 | 3.05 | 8.36 | 6.02 | 16.07 |
| 125 | 5 | 141.3 | 19.05 | 57.43 | 9.53 | 31.97 | 9.47 | 2.77 | 49.11 | 15.88 | 3.40 | 11.57 | 6.55 | 21.8 |
| 250 | 10 | 273.1 | 25.40 | 155.15 | 12.7 | 96.0 | 22.63 | 3.40 | 172.4 | 28.6 | 4.19 | 27.78 | 9.27 | 60.5 |
| 200 | 8 | 219.1 | 22.23 | 107.8 | 12.7 | 64.6 | 14.79 | 2.77 | 111.2 | 23.0 | 3.76 | 19.96 | 8.18 | 42.6 |
| 350 | 14 | 355.6 | – | – | 19.05 | 158.08 | 34.36 | 3.96 | 281.70 | 35.71 | 4.78 | 41.3 | 11.13 | 94.59 |
| 6 | 1/4 | 13.7 | – | – | 3.02 | 0.80 | 0.390 | 1.24 | – | – | 1.65 | 0.49 | 2.24 | 0.631 |
| 400 | 16 | 406.4 | – | – | 21.41 | 203.33 | 41.56 | 4.19 | 365.11 | 40.46 | 4.78 | 47.29 | 12.7 | 123.30 |
| 20 | 3/4 | 26.7 | 7.82 | 3.63 | 3.91 | 2.20 | 1.03 | 1.65 | 2.89 | 5.54 | 2.11 | 1.28 | 2.87 | 1.68 |
| 500 | 20 | 508.0 | – | – | 26.19 | 311.2 | 59.25 | 4.78 | 564.68 | 49.99 | 5.54 | 68.71 | 15.09 | 183.42 |
| 450 | 18 | 457.2 | – | – | 23.8 | 254.36 | 46.80 | 4.19 | 466.40 | 45.71 | 4.78 | 53.42 | 14.27 | 155.80 |
Duplex Steel UNS S32205 Buttweld Fitting Weight Chart
| Pipe Elbow Nominal Size | Pipe Elbow Outside Diameter Y | Wall Thickness T (Pipe Elbow Schedule) | 45 Deg. Elbow LR Centre to Face B | 45 Deg. Elbow LR Weight | 90 Deg. Elbow LR Centre to Face A | 90 Deg. Elbow LR Weight | 90 Deg. Elbow SR Centre to Face A | 90 Deg. Elbow SR Weight | ||
| mm | in | mm | mm | Schedule | mm | kg | mm | kg | mm | kg |
| 15 | 1/2” | 21.3 | 2.78 | STD | 15.9 | 0.04 | 38.1 | 0.08 | – | – |
| 3.73 | X.S | 15.9 | 0.05 | 38.1 | 0.10 | – | – | |||
| 20 | 3/4” | 26.7 | 2.87 | STD | 11.1 | 0.04 | 28.6 | 0.08 | – | – |
| 3.91 | X.S | 11.1 | 0.05 | 28.6 | 0.11 | – | – | |||
| 25 | 1” | 33.4 | 3.38 | STD | 22.2 | 0.09 | 38.1 | 0.15 | 25.4 | 0.11 |
| 4.55 | X.S | 22.2 | 0.11 | 38.1 | 0.19 | 25.4 | 0.14 | |||
| 32 | 11/4” | 42.2 | 3.56 | STD | 25.4 | 0.14 | 47.6 | 0.28 | 31.75 | 0.18 |
| 4.85 | X.S | 25.4 | 0.2 | 47.6 | 0.39 | 31.75 | 0.24 | |||
| 40 | 11/2” | 48.3 | 3.68 | STD | 28.6 | 0.2 | 57.1 | 0.4 | 38.1 | 0.26 |
| 5.08 | X.S | 28.6 | 0.25 | 57.1 | 0.5 | 38.1 | 0.35 | |||
| 50 | 2” | 60.3 | 3.91 | STD | 34.9 | 0.36 | 76.2 | 0.72 | 50.8 | 0.5 |
| 5.54 | X.S | 34.9 | 0.5 | 76.2 | 1.0 | 50.8 | 0.68 | |||
| 65 | 21/2” | 73.0 | 5.16 | STD | 44.4 | 0.73 | 95.2 | 1.46 | 63.5 | 0.95 |
| 7.01 | X.S | 44.4 | 0.91 | 95.2 | 1.82 | 63.5 | 1.27 | |||
| 80 | 3” | 88.9 | 5.49 | STD | 50.8 | 1.1 | 114.3 | 2.18 | 76.2 | 1.45 |
| 7.62 | X.S | 50.8 | 1.45 | 114.3 | 2.86 | 76.2 | 1.95 | |||
| 100 | 4” | 114.3 | 6.02 | STD | 63.5 | 2.1 | 152.4 | 4.2 | 101.6 | 2.8 |
| 8.56 | X.S | 63.5 | 2.9 | 152.4 | 5.7 | 101.6 | 3.9 | |||
| 125 | 5” | 141.3 | 6.65 | STD | 79.4 | 3.4 | 190.0 | 6.8 | 127.0 | 4.8 |
| 9.5 | X.S | 79.4 | 5.0 | 190.0 | 10.0 | 127.0 | 6.5 | |||
| 150 | 6” | 168.3 | 7.11 | STD | 95.2 | 5.1 | 229.0 | 10.1 | 152.4 | 6.8 |
| 10.97 | X.S | 95.2 | 7.7 | 229.0 | 15.3 | 152.4 | 10.2 | |||
| 200 | 8” | 219.1 | 8.18 | STD | 127.0 | 10.2 | 305.0 | 20.4 | 203.0 | 13.6 |
| 12.7 | X.S | 127.0 | 15.5 | 305.0 | 30.9 | 203.0 | 20.9 | |||
| 250 | 10” | 273.9 | 9.27 | STD | 159.0 | 18.1 | 381.0 | 36.1 | 254.0 | 24.1 |
| 12.7 | X.S | 159.0 | 24.4 | 381.0 | 48.8 | 254.0 | 32.5 | |||
| 300 | 12” | 323.9 | 9.52 | STD | 190.0 | 26.6 | 457.0 | 53.1 | 305.0 | 35.4 |
| 12.7 | X.S | 190.0 | 35.0 | 457.0 | 70.0 | 305.0 | 46.7 | |||
| 350 | 14” | 355.6 | 9.52 | STD | 222.0 | 34.1 | 533.0 | 68.1 | 356.0 | 45.4 |
| 12.7 | X.S | 222.0 | 45.0 | 533.0 | 90.0 | 356.0 | 60.0 | |||
| 400 | 16” | 406.4 | 9.52 | STD | 254.0 | 45.0 | 610.0 | 89.3 | 406.0 | 59.5 |
| 12.7 | X.S | 254.0 | 59.0 | 610.0 | 118.0 | 406.0 | 78.7 | |||
| 450 | 18” | 457.0 | 9.52 | STD | 286.0 | 56.5 | 686.0 | 113.0 | 457.0 | 75.6 |
| 12.7 | X.S | 286.0 | 75.0 | 686.0 | 150.0 | 457.0 | 100.0 | |||
| 500 | 20” | 508.0 | 9.52 | STD | 318.0 | 85.0 | 762.0 | 140.0 | 508.0 | 93.5 |
| 12.7 | X.S | 318.0 | 112.5 | 762.0 | 186.0 | 508.0 | 124.0 | |||
| 600 | 24” | 610.00 | 9.52 | STD | 381.0 | 101.5 | 914.0 | 203.0 | 610.0 | 135.0 |
| 12.7 | X.S | 381.0 | 134.5 | 914.0 | 269.0 | 610.0 | 179.0 | |||
Manufacturing Process of UNS S32205 Duplex Steel Buttweld Fitting
Choosing certified raw materials that satisfy ASTM A815 and ASME SA815 requirements is the first step in the production of Duplex S32205 Buttweld Fittings. Depending on the type of fitting, hot or cold forming is accomplished by pressing, hammering or extrusion after duplex stainless steel billet or pipe have been cut to the necessary length. Formed components undergo solution annealing heat treatment to stabilise the duplex structure and eliminate residual stresses.
Post heat treatment, the fittings are machined to precise dimensions and tolerances using CNC or conventional methods. The surface undergoes pickling, passivation, or shot blasting to remove scale and achieve a uniform finish. Non destructive testing (NDT) like dye penetrant, ultrasonic or radiographic inspection is performed on each fitting. Dimensional inspection, mechanical testing and the issuance of Mill Test Certificates (MTCs) in compliance with EN 10204 3.1 are examples of final quality checks. Consistency, traceability and adherence to global quality standards like ISO 9001:2015 are guaranteed by the procedure
Pipe
Cutting
Forming
Sizing
Heat Treatment
Pickling
Beveling
Polishing
Sand Blasting
Elbow
Inspection
Analytic
Marking
Packing & Shipping
Applications of UNS S32205 Duplex Steel Buttweld Pipe Fittings
UNS S32205 Duplex Steel Buttweld Pipe Fittings work well in tough and corrosive environments across many industries. In petrochemical plants these fittings connect pipes in high-pressure processing lines. In seawater systems, ASTM A815 S32205 Seamless Tee handles intake and discharge lines, where salt exposure is constant. The 2205 fittings for oil & gas pipelines are used in riser and flowline systems that face pressure and chloride attack. Desalination plants install them in high-salinity brine pipelines. In chemical processing units, they support reactors and storage tanks exposed to aggressive chemicals. Pharmaceutical plants use them in clean water and sterile fluid systems that demand corrosion-free piping.
Our headquartered in India, is a recognised exporter of Duplex Steel UNS S32205 Buttweld Fittings to a wide network of global markets. We are a reliable partner in many industrial sectors around the world because our fittings continuously satisfy the technical requirements of global projects.
We continue to export frequently to the Gulf nations such as the United Arab Emirates, Saudi Arabia, Oman, Qatar, and Kuwait, where the infrastructure and oil and gas industries require high-strength, corrosion-resistant piping solutions. With robust supply chains in Germany, the United Kingdom, France, and Italy, as well as in Asia-Pacific countries like Singapore, Malaysia, Indonesia, and South Korea, our presence is still growing.
We also serve emerging markets in Africa and Latin America, including South Africa, Nigeria, Egypt, and Brazil, where industrial growth drives demand for duplex-grade materials.We guarantee timely delivery, flawless port handling, export-quality packaging and correct customs documentation. Our dedication to quality, compliance and the dependability of global logistics has allowed us to establish enduring relationships with distributors, OEMs, EPC companies, government organizations and project contractors.
Why Choose Midland Alloys Inc. for Duplex Steel UNS S32205 Buttweld Fittings
Midland Alloys Inc. is an ISO 9001 certified manufacturer committed to delivering high-quality Duplex Steel UNS S32205 Buttweld Fittings with precision and reliability. We have a strong worldwide export network that guarantees every customer receives their orders safely, and on schedule. Our fittings are available in custom lengths, surface finishes and coil forms to match diverse project needs. We help customers in keeping control and confidence over each order by providing continuous customer service and full material traceability.
FAQs – Duplex Steel UNS S32205 Buttweld Fitting
Seamless fittings are manufactured from a single piece of metal, offering superior strength and uniformity. Welded fittings are made by welding pieces together, which is more cost-effective but may not offer the same pressure resistance as seamless types.
We have SCH 10, 40, 80, and custom wall thicknesses in addition to a large selection of sizes ranging from ½” to 24″.
Common tests include hydrostatic testing, PMI (Positive Material Identification), ultrasonic testing and destructive tests like tensile and impact testing, depending on client or project specifications.
Duplex S32205 performs well from -50°C up to approximately 300°C. Prolonged exposure above this range may cause microstructural changes and reduced corrosion resistance.
Yes, we offer specific requirements of each project, we provide customized fabrication alternatives like as non-standard dimensions, customized surface treatments, and end preparations.
