Home > Duplex Steel > Duplex Steel S31803 Pipe
At Nasir Nickel Alloys in Manama, Bahrain, Duplex Steel S31803 Pipe is engineered to provide superior strength, corrosion resistance, and durability for demanding industrial applications. Featuring a balanced austenitic-ferritic microstructure, this pipe resists pitting, crevice corrosion, and stress-corrosion cracking in chloride-rich and chemically aggressive environments. Manufactured with precision to ensure dimensional stability and consistent mechanical properties, Duplex Steel S31803 Pipe delivers reliable, leak-tight performance under high-pressure and thermal cycling conditions. Ideal for chemical processing, petrochemical, oil and gas, power generation, and marine industries, it provides robust, long-lasting, and high-performance solutions for critical piping systems.
Duplex Steel S31803 Pipe is composed primarily of chromium, nickel, molybdenum, and nitrogen, forming a balanced austenitic-ferritic structure. This composition provides high tensile and yield strength, excellent toughness, and superior resistance to pitting, crevice corrosion, and stress-corrosion cracking. The pipe maintains 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 Pipe ensures long-lasting, reliable performance in chemical, petrochemical, marine, offshore, and power generation applications where conventional stainless steels may fail.
Pipe Range : 1 / 2″ NB – 8″ NB
Outer Diameter : 6.0-630mm
Wall Thickness : 0.3mm – 50 mm
Schedules : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Length : Single Random, Double Random & Required Length
Specifications : ASTM A790 / ASME SA790
| Duplex | S31803 |
|---|---|
| Ni | 4.50 – 6.50 |
| Fe | 63.72 min |
| Cr | 22.0 – 23.0 |
| C | 0.030 max |
| Si | 1.00 max |
| Mn | 2.00 max |
| P | 0.030 max |
| S | 0.020 max |
| N | 0.14 – 0.20 |
| Grade | S31803 |
| Density (g/cm 3) | 7.805 |
| Density (lb/in 3) | 0.285 |
| Melting Point (°C) | 1420 – 1465 |
| Melting Point (°F) | 2588 – 2669; |
At Nasir Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Pipe 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 Pipe is widely used in industries requiring corrosion-resistant, high-strength, and durable piping solutions. It is essential in chemical and petrochemical plants for heat exchangers, reactors, storage tanks, and process piping exposed to acids, chlorides, and oxidizing chemicals. Oil and gas industries utilize this pipe in offshore platforms, subsea pipelines, and high-pressure transportation systems. Power generation facilities employ Duplex Steel S31803 Pipe in boilers, turbines, and cooling water systems. Marine and desalination plants rely on it for seawater-resistant piping. The pipe ensures structural integrity, leak-tight performance, and long-term durability in harsh, high-pressure, and corrosive industrial environments.
