Home > Duplex Steel > Duplex Steel S31803 Coils
At Nasir Nickel Alloys in Manama, Bahrain, Duplex Steel S31803 Coils are designed to deliver exceptional strength, corrosion resistance, and durability for demanding industrial applications. Featuring a balanced austenitic-ferritic microstructure, these coils resist pitting, crevice corrosion, and stress-corrosion cracking in chloride-rich and chemically aggressive environments. Manufactured with precision for consistent thickness, dimensional stability, and mechanical reliability, Duplex Steel S31803 Coils are ideal for fabrication, forming, and structural applications. Perfect for chemical processing, petrochemical, oil and gas, power generation, and marine industries, they provide robust, long-lasting, and high-performance solutions for critical industrial components.
Duplex Steel S31803 Coils are composed primarily of chromium, nickel, molybdenum, and nitrogen, forming a balanced austenitic-ferritic microstructure. This composition provides high tensile and yield strength, excellent toughness, and superior resistance to pitting, crevice corrosion, and stress-corrosion cracking. The coils maintain mechanical integrity, dimensional stability, and performance under thermal cycling, high-pressure, and mechanically demanding conditions. Combining corrosion resistance, durability, and high strength, Duplex Steel S31803 Coils ensure long-lasting, reliable performance in chemical, petrochemical, marine, offshore, and power generation applications where conventional stainless steels may fail.
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 Nasir Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Coils in Manama, Bahrain, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Bahrain, 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 widely used in industries requiring corrosion-resistant, high-strength, and durable metal for fabrication and structural applications. They are essential in chemical and petrochemical plants for heat exchangers, pressure vessels, storage tanks, and piping systems exposed to acids, chlorides, and oxidizing chemicals. Oil and gas industries utilize these coils in offshore platforms, subsea structures, and high-pressure piping systems. Power generation facilities employ Duplex Steel S31803 Coils in boilers, turbines, and cooling water systems. Marine and desalination plants rely on them for seawater-resistant fabrication. These coils ensure structural integrity, leak-tight performance, and long-term durability in harsh, corrosive, and high-pressure environments.
