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One of the top producers and suppliers of high-quality Duplex Steel S31803 Sheets and Plates is Daksh Sheets and Plates, situated in Hyderabad, India. These duplex products are known for their remarkable durability, strength, and resistance to corrosion. They are especially designed to be used in harsh conditions. To satisfy the demands of the power generation, oil and gas, marine, and chemical processing industries, we provide a range of sizes, thicknesses, and finishes. High-performance solutions that satisfy exacting project specifications and international standards are provided by Daksh Sheets and Plates, which is dedicated to quality, accuracy, and client satisfaction.
About 22–23% chromium, 4.5–6.5% nickel, 3–5% molybdenum, and trace elements like manganese, nitrogen, and carbon make up Duplex Steel S31803. This austenite and ferrite dual-phase microstructure provides a special blend of excellent corrosion resistance and high mechanical strength. The alloy exhibits elongation of 25–40%, yield strength of 450–620 MPa, and tensile strength of 620–850 MPa. S31803 plates are ideal for use in aggressive and chloride-rich industrial settings because of their exceptional resistance to stress corrosion cracking, pitting, and crevice corrosion.
| Size | : | 1/2″NB TO 4″NB IN |
| Standard | : | ASTM A182 / ASME SA182 |
| Dimensions | : | ANSI/ASME B16.11 & BS3799, etc. |
| Grade | : | UNS S31803, S32205, S2205, S32550, S32750, S32760. |
| Class | : | 2000LBS, 3000LBS, 6000LBS, 9000LBS, etc. |
| UNS S31803 | Ni | Cr | Mo | Mn | Si | C | N | S | P | Fe |
| min | 4.5 | 22.0 | 3.0 | – | – | – | 0.14 | – | – | – |
| max | 6.5 | 23.0 | 3.5 | 2.0 | 1.0 | 0.03 | 0.2 | 0.02 | 0.03 | Balance |
| Grade | S31803 |
| Density (g/cm 3) | 7.805 |
| Density (lb/in 3) | 0.285 |
| Melting Point (°C) | 1420 – 1465 |
| Melting Point (°F) | 2588 – 2669; |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Duplex Steel Sheet and Plates S31803 offer exceptional strength, corrosion resistance, and durability, making them ideal for harsh environments. With a balanced microstructure of austenite and ferrite, they provide higher resistance to stress corrosion cracking and pitting. These plates are highly resistant to chloride environments, ensuring long-lasting performance in industries like oil and gas, chemical processing, and marine applications. Their excellent weldability and formability make them versatile for various fabrication processes, while their cost-effectiveness compared to high-alloy steels makes them a popular choice for demanding applications.
| Duplex 2205 | UNS S31803 | 1.4462 | F51 |
| Thickness (mm) | Length x width (mm) | Length x width (mm) | Length x width (mm) | Length x width (mm) | Length x width (mm) |
| 5 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 6 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 8 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 10 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 12 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 15 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 16 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 20 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 25 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 30 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 35 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 40 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 45 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 50 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 60 | 4000 x 2000 | ||||
| 70 | 4000 x 2000 | ||||
| 80 | 4000 x 2000 | ||||
| 90 | 4000 x 2000 | ||||
| 100 | 4000 x 2000 |
| Surface finish | Thickness (mm) | Width (mm) |
|---|---|---|
| 2B – Cold rolled, heat treated, pickled, skin passed | 0.25–8.0 | max. 2032 |
| 2D – Cold rolled, heat treated, pickled | 0.4–6.35 | max. 1524 |
| 2E – Cold rolled, heat treated, mechanically descaled | 0.4–8.0 | max. 2032 |
| 2R – Cold rolled, bright annealed | 0.25–3.5 | max. 1524 |
| 2H – Work hardened | 0.4–6.35 | max. 1524 |
| Polished, brushed | 0.5–4.0 | max. 1524 |
Many industries that require mechanical strength, corrosion resistance, and durability use Duplex Steel S31803 Sheets and Plates. Heat exchangers, storage tanks, pressure vessels, pipeline systems, and offshore oil rigs are some of the main uses. They are ideal for desalination and marine plants because they can resist corrosion caused by chloride, and their durability supports vital infrastructure in pulp and paper mills, chemical plants, and power generation facilities. The material is favored for contemporary engineering challenges due to its exceptional weldability, superior fatigue and impact resistance, and long-term performance in high-stress environments.
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