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Xuan Flanges, a reputable manufacturer and supplier based in Da Nang, Vietnam, offers top-notch Duplex Steel S31803 Flanges that are well-known for their impressive strength, durability, and outstanding resistance to corrosion. These flanges are crafted to meet international standards, guaranteeing reliability and long-lasting performance even in tough conditions. You can find them in various types, including slip-on, weld neck, socket weld, blind, threaded, and lap joint, ensuring secure and leak-proof connections in pipes. This makes them a go-to choice for industries where both strength and corrosion resistance are crucial.
The makeup of Duplex Steel S31803 Flanges features around 22% Chromium, 5–6% Nickel, 3% Molybdenum, and controlled Nitrogen, which together create a balanced austenitic-ferritic structure. This unique dual-phase microstructure provides excellent resistance to stress corrosion cracking, crevice corrosion, and pitting caused by chlorides. On the mechanical side, these flanges boast high tensile and yield strength, remarkable fatigue resistance, and great toughness, often outshining many traditional stainless steels, particularly in demanding and high-pressure situations.
| Specifications | ASTM A182 / ASME SA182 |
| Size | 1/8″ NB TO 48″ NB |
| Standards | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Grades | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
At Xuan Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Flanges in Da Nang, Vietnam, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Vietnam, 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.
Duplex Steel S31803 Flanges find extensive applications across various sectors, including oil & gas, petrochemicals, chemical processing, power generation, marine engineering, paper & pulp, and desalination. Their exceptional ability to resist harsh, chloride-rich environments makes them perfect for offshore platforms, pipelines, heat exchangers, pressure vessels, and structural uses. With their sturdy design, long service life, and capacity to endure extreme operating conditions, Duplex Steel S31803 Flanges are a smart and reliable choice for critical industrial projects.