Home > Duplex Steel > Duplex Steel S31803 Coils
Aisha Nickel Alloys, located in Muscat, Oman, stands out as a top manufacturer and supplier of high-quality Duplex Steel S31803 Coils. Known for their remarkable corrosion resistance, outstanding strength, and durability, these coils are designed to meet the rigorous demands of various industries. With cutting-edge manufacturing facilities and strict quality control measures, Aisha Nickel Alloys guarantees that every S31803 Coil performs consistently and reliably. Serving sectors like oil and gas, chemical processing, and marine applications, the company has built a solid reputation for delivering robust, precision-engineered duplex steel solutions that boost operational efficiency and longevity.
Duplex Steel S31803 Coils boast a well-balanced microstructure of austenite and ferrite, providing high strength and excellent resistance to stress corrosion cracking. The alloy typically includes 22–23% chromium, 3.0–3.5% nickel, and 3.0% molybdenum, along with low carbon content that enhances toughness and corrosion resistance. Mechanically, these coils show a yield strength of 450–550 MPa, tensile strength of 700–850 MPa, and an elongation of about 25%. The duplex structure ensures superior resistance to pitting and crevice corrosion while maintaining excellent weldability and fatigue performance, making S31803 Coils perfect for challenging industrial settings.
Standard ASTM A240 / ASME SA240
Range 5mm To 150mm
Width 1000mm / 1219mm /1250mm / 1500mm / 2000mm
Length 2000 mm / 2440 mm / 2500 mm / 3000 mm / 6000 mm.
Surface Finishing Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)
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 |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| S31803 | 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
At Aisha Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Coils in Muscat, OMAN, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the OMAN, 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 Coils are extensively utilized in industries that demand high strength and corrosion resistance. They are particularly suited for chemical and petrochemical plants, desalination units, pulp and paper processing, and offshore oil and gas platforms. These coils are also employed in heat exchangers, pressure vessels, storage tanks, and marine structures that face seawater exposure. Their exceptional resistance to stress corrosion cracking and pitting ensures long-lasting performance, making them a reliable choice for various demanding applications.