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Duplex Steel pipe fittings are top-notch components crafted from duplex stainless steel, which boasts a unique dual-phase microstructure of austenite and ferrite. This special structure gives them remarkable mechanical strength, exceptional corrosion resistance, and impressive durability, even in tough environments. These fittings stand up well against pitting, crevice corrosion, and stress corrosion cracking caused by chlorides, making them perfect for critical piping systems in industries like chemical processing, petrochemicals, oil and gas, marine, and power generation.
Typically, Duplex Steel pipe fittings are made up of 22–25% chromium, 4–7% nickel, 2–4% molybdenum, and nitrogen, all of which boost their corrosion resistance and mechanical strength. They offer tensile strength ranging from 620–850 MPa and yield strength around 450–550 MPa, along with excellent toughness, ductility, and fatigue resistance. The balanced duplex microstructure also provides thermal stability and resistance to intergranular corrosion, ensuring reliable performance under high-pressure and high-temperature conditions.
| Specifications | ASTM A815/ ASME SA815 |
|---|---|
| Bending Radius | Radius=1 D, 2D, 3 D, 5D, 6D, 8 D, 10D |
| Size Range | Seamless Butt-Weld Fitting: From 1/2″ – 10″ Welded ButtWeld Fitting: From 1/2″ – 48″ |
| Dimension | ASME/ ANSI B16.9 | ASME B16.28 | MSS-SP-43 | BS1560 | BS4504 | BS10 |
| Size Ranges | ½” NB to 24″ NB in Schedule 10s, 40s, 80s, 160s, XXS. |
| Other Grades | Duplex 2205 Fittings, UNS S31803 Fittings, UNS S32205 Fittings |
| Types | Welded | Seamless | Fabricated |
| Process of Duplex Steel Fittings Manufacturer in india | Push, Press, Cast, Forge. |
| Thickness of Fitting | SCH10, SCH 20, SCH30, STD SCH40, SCH80, SCH60, XS, SCH100, SCH 120, SCH140, SCH 160, XXS available with NACE MR 01-75 |
| Grade | Duplex Pipe Fittings |
|---|---|
| S | 0.020 maximum |
| C | 0.030 maximum |
| Cr | 22.0 – 23.0 |
| Mn | 2.00 maximum |
| Ni | 4.50 – 6.50 |
| Si | 1.00 maximum |
| Fe | 63.72 min |
| P | 0.030 maximum |
| Mo | 3.0 – 3.5 |
| N | 0.14 – 0.20 |
| Gr. | Density (lb/in 3) | Density (g/cm 3) | Melting Point (°F) | Melting Point (°C) |
| Duplex Steel Pipe Fittings | 0.285 | 7.805 | 2588 – 2669 | 1420 – 1465 |
At Themban Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Pipe Fittings in Cape Town , South Africa, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Cape Town, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
You’ll find Duplex Steel pipe fittings in pipelines, pressure vessels, heat exchangers, desalination plants, and offshore installations. Their blend of high mechanical strength, corrosion resistance, and long-lasting durability guarantees secure connections, low maintenance, and dependable performance in aggressive industrial and marine settings. These fittings are particularly suited for applications involving seawater, acids, and other corrosive substances.