Home > Duplex Steel > Duplex Steel S31803 Sheet and Plates
Strategically located in the industrial heart of Kinshasa, Okoye Nickel Alloys stands as a leading provider of essential materials, serving a diverse range of demanding sectors across the Congo. We are specialists in high-performance metals, with a core focus on supplying premium Duplex Steel S31803 sheet and plate. Our commitment is to equip local industries with robust materials that offer a superior combination of strength and corrosion resistance, empowering them to tackle challenging projects with confidence and build towards a stronger, more resilient future.
The unique strength of Duplex Steel S31803 lies in its balanced microstructure, which blends the best qualities of austenitic and ferritic steels. This results in a material with roughly double the yield strength of standard austenitic grades, providing exceptional resistance to stress cracking and wear. It also possesses outstanding resistance to pitting and corrosion from chlorides, making it far more durable than many alternatives in harsh environments where other materials might quickly fail.
Specifications : ASTM A240 / ASME SA240
Dimensions : ASTM, ASME, and API
Width : 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc
Thickness : 4mm-100mm
Length : 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc
Surface Finish : 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, chequered, embossed, hairline, sand blast, Brush, etching, Hot rolled plate (HR), Cold rolled sheet (CR), SATIN (Met with Plastic Coated) etc
Hardness : Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc.
Form : Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) etc.
| 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 Okoye Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex S31803 Sheets and Plates in Kinshasa, Congo, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Congo, 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.
This impressive combination of strength and durability makes S31803 sheet and plate indispensable across numerous critical industries. You’ll find it confidently performing in the demanding environments of chemical processing plants, oil and gas extraction equipment, and desalination units where saltwater corrosion is a constant challenge. It is also a top choice for marine architecture, pollution control systems, and components within pulp and paper manufacturing, consistently delivering long-lasting performance where reliability and safety are absolutely non-negotiable.
