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Hashmi Sheets and Plates, based in Doha, Qatar, is a trusted manufacturer and supplier of high-performance stainless steels. Among its specialized offerings are Duplex Steel Sheets and Plates S31803, designed for applications requiring superior corrosion resistance and enhanced mechanical strength. Manufactured under strict quality standards and in compliance with international specifications, these sheets and plates provide exceptional durability and reliability in challenging environments. Serving industries such as oil and gas, chemical processing, marine, and water treatment, Hashmi delivers steel solutions that combine excellent resistance to pitting, stress corrosion cracking, and crevice corrosion with high structural strength, ensuring long-term operational performance.
Duplex Steel S31803 Sheets and Plates feature a balanced duplex microstructure with approximately equal portions of austenite and ferrite. Its composition includes chromium, nickel, molybdenum, nitrogen, and iron, providing excellent resistance to chloride-induced stress corrosion cracking and pitting. The steel offers a minimum yield strength of 450 MPa and tensile strength of 750–850 MPa, along with good ductility and toughness. S31803 sheets and plates also exhibit excellent weldability and formability, making them suitable for structural and pressure-containing applications requiring both high strength and superior corrosion resistance.
| 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 |
Duplex Steel Sheet and Plates S31803 are widely used in industries requiring high strength and corrosion resistance. Common applications include the oil and gas industry, chemical processing, marine environments, and power generation. These plates are ideal for offshore rigs, heat exchangers, pressure vessels, and storage tanks due to their resistance to chloride-induced stress corrosion cracking. They are also used in pulp and paper mills, desalination plants, and various structural applications. Their excellent weldability, combined with superior mechanical properties, makes them suitable for demanding, high-performance environments.
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