Home > Duplex Steel > Duplex Steel S31803 Sheet and Plates
Bilal Nickel Alloys, based in Safat, Kuwait, is a respected manufacturer and supplier of high-quality Duplex Steel S31803 Sheet and Plates, trusted by industries that demand exceptional strength and corrosion resistance. Duplex Steel S31803 features a balanced ferritic–austenitic microstructure, offering superior mechanical properties and enhanced resistance to pitting, crevice corrosion, and stress-corrosion cracking. At Bilal Nickel Alloys, each sheet and plate is crafted with precision to meet rigorous international standards. With a commitment to reliability, durability, and customer satisfaction, the company delivers S31803 products ideally suited for challenging environments in chemical processing, marine engineering, and oil and gas applications.
Duplex Steel S31803 Sheet and Plates are composed of chromium, nickel, molybdenum, and nitrogen, creating a dual-phase alloy that enhances strength and corrosion resistance. The ferritic–austenitic structure provides high tensile and yield strength, excellent toughness, and superior resistance to chloride-induced corrosion. S31803 maintains stability under high pressures and varying temperatures, offering great fatigue and stress-corrosion resistance. The alloy also demonstrates good weldability and formability, enabling efficient fabrication. These mechanical properties make S31803 ideal for demanding industries that require long-term structural performance.
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 Bilal Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex S31803 Sheets and Plates in Safat, Kuwait, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Kuwait, 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 Sheet and Plates are widely used in applications where enhanced strength and corrosion resistance are essential. In the chemical and petrochemical sectors, they are used for heat exchangers, tanks, pressure vessels, and processing equipment exposed to aggressive chemicals. The marine and offshore industries rely on them for seawater systems, desalination plants, and structural components due to their excellent resistance to chloride corrosion. Oil and gas operations use S31803 for pipelines, flowlines, and risers. Additional applications include pulp and paper equipment, food processing units, and mining machinery. Their durability makes them suitable for harsh, high-performance environments.
