At Adinox Overseas, we proudly supply a comprehensive range of Duplex Steel S31803 Flanges, manufactured to meet the most stringent international standards, including ASTM A182 F51. These flanges, also recognized under the UNS S31803 designation, are an industry-preferred choice for critical applications due to their superior mechanical properties and exceptional corrosion resistance.
Duplex Steel S31803 combines the best features of both austenitic and ferritic stainless steels, offering an excellent balance of strength and toughness. Our ASTM A182 F51 Flanges are engineered for performance in highly corrosive environments such as chemical processing, offshore oil drilling, petrochemical, and marine industries. The microstructure of Duplex S31803 offers double the yield strength compared to conventional austenitic stainless steels like 304 and 316, making it a cost-effective and durable option.
At Adinox Overseas, we provide a wide variety of Duplex Steel S31803 Flange types, including weld neck flanges, slip-on flanges, socket weld flanges, threaded flanges, lap joint flanges, blind flanges, and spectacle blind flanges. These are all manufactured using the latest machinery and thoroughly tested to ensure compliance with international norms. Our flanges exhibit excellent resistance to pitting, stress corrosion cracking, and crevice corrosion, particularly in chloride-rich environments. This makes them especially suitable for use in desalination plants, pressure vessels, heat exchangers, and marine environments.
If you're looking for dependable and efficient Duplex Steel S31803 ASTM A182 F51 Flanges, Adinox Overseas is your trusted partner. With a robust supply chain, custom size options, and timely delivery, we ensure your industrial projects move ahead without delays or compromise on quality.
| Specifications | ASTM A182, A240 / ASME SA182, SA240 |
|---|---|
| Standards | ANSI Flanges, ASME Flanges, DIN Flanges, EN Flanges, BS Flanges, JIS Flanges, AWWA Flanges etc. |
| Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc |
| Size Range | 1/2" (15 NB) to 48" (1200NB) |
| Pressure / Class | 150#, 300#, 600#, 900#, 1500# & 2500#. |
| Flange Face Type | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| 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 | 21.0 – 23.0 | 2.50 - 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
|---|---|---|---|---|
| S31803 | 7.8 | 0.281 | 1350 | 2460 |
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