Home > Duplex Steel > Duplex Steel S31803 Tubing
At Nasir Nickel Alloys in Manama, Bahrain, Duplex Steel S31803 Tubing is designed to provide superior strength, corrosion resistance, and durability for demanding industrial applications. Featuring a balanced austenitic-ferritic microstructure, this tubing resists pitting, crevice corrosion, and stress-corrosion cracking in chloride-rich and chemically aggressive environments. Manufactured with precision for dimensional stability and consistent mechanical properties, Duplex Steel S31803 Tubing ensures reliable, leak-tight performance under high-pressure and thermal cycling conditions. Ideal for chemical processing, petrochemical, oil and gas, power generation, and marine applications, it delivers robust, high-performance solutions for critical piping, heat exchangers, and structural systems.
Duplex Steel S31803 Tubing 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 tubing 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 Tubing ensures long-lasting, reliable performance in chemical, petrochemical, marine, offshore, and power generation applications where conventional stainless steels may fail.
| Specifications | : | ASTM A789 ASME SA789 |
| Dimensions | : | ASTM, ASME and API |
| Tube Size | : | 1/2″NB TO 12 “NB IN |
| Specialized in | : | Large Diameter Size |
| Schedule | : | SCH20, SCH30, SCH40, STD, SCH80 |
| Type | : | Seamless / ERW / Welded / Fabricated |
| Form | : | Round, Hydraulic Etc |
| Length | : | Single Random, Double Random & Cut Length. |
| End | : | Plain End, Beveled End, Treaded |
| S31803 | C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 – 3.5 | 22.0 – 23.0 | 0.03 | 4.5 – 6.5 | 0.14 – 0.2 | Bal |
| S31803 | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
At Nasir Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Tubing 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 Tubing is widely used in industries that require corrosion-resistant, high-strength, and durable piping solutions. It is essential in chemical and petrochemical plants for heat exchangers, reactors, condensers, and process piping exposed to acids, chlorides, and oxidizing chemicals. Oil and gas industries utilize this tubing in offshore platforms, subsea pipelines, and high-pressure transport systems. Power generation facilities employ Duplex Steel S31803 Tubing in boilers, turbines, and cooling systems. Marine and desalination plants rely on it for seawater-resistant piping. This tubing ensures structural integrity, leak-tight performance, and long-term durability in harsh, corrosive, and high-pressure industrial environments.
