Home > Duplex Steel > Duplex Steel S31803 Tube Fittings
Bilal Nickel Alloys, based in Safat, Kuwait, is a trusted manufacturer and supplier of Duplex Steel S31803 Tube Fittings, engineered for exceptional strength, corrosion resistance, and long-term reliability. These fittings are precision-manufactured to provide secure, leak-free connections in high-pressure, chemically aggressive, and marine environments. Leveraging decades of expertise in duplex stainless steels, Bilal Nickel Alloys ensures that every S31803 tube fitting meets stringent quality standards, combining mechanical performance with chemical durability. Their commitment to engineering excellence and customer satisfaction makes these fittings a preferred choice for industries requiring robust, corrosion-resistant, and high-performance tube connections for critical piping systems.
Duplex Steel S31803 Tube Fittings are composed of iron, chromium (~22%), nickel (~5–6%), molybdenum (~3%), and nitrogen, providing a balanced duplex microstructure of ferrite and austenite. This composition ensures excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, while offering high tensile strength, hardness, and ductility. Mechanically, S31803 fittings maintain structural integrity under high pressure and elevated temperatures. Their robust microstructure ensures dimensional stability, long-term durability, and chemical resistance, making these tube fittings ideal for demanding industrial applications where both mechanical reliability and corrosion resistance are essential.
| ASTM A815 WPS S31803 Pipe Fittings Standard Dimensions | ASME/ ANSI B16.9, ASME B16.28, MSS-SP-43, BS1560, BS4504, BS10 ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799 |
|---|---|
| Specifications | ASTM A815 / ASME SA815 |
| Duplex Steel S31803 Elbow | Angle : 22.5 deg, 30deg, 45 deg, 90 deg, 180 deg, 1.0D, 1.5D, 2.0D, 2.5D, 3D, 4D, 5D, 6D, 7D-40D. Standard: ASME B16.9, ASME B16.28, ASME B16.25, MSS SP-75 DIN2605 JISB2311 JISB2312 JISB2313, BS, GB, ISO |
| A815 WPS S31803 Pipe Fittings Thickness | SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75 |
| ASTM A815 WPS 31803 Pipe fittings Thread | NPT, BSPT, BSPP |
| Duplex Steel S31803 Forged Fittings Types | Seamless / Welded / ERW / Fabricated UNS S31803 DSS Pipe Fittings |
| 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 |
| 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 Bilal Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803Tube Fittings 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 Tube Fittings are widely used in chemical processing, petrochemical, oil and gas, marine, and offshore industries, where both corrosion resistance and mechanical strength are critical. They are ideal for connecting piping systems, heat exchangers, reactors, and high-pressure process tubing exposed to seawater, chlorides, and aggressive chemicals. These fittings are also employed in power generation, desalination plants, and specialized industrial equipment, providing safe, leak-free, and durable connections. Engineers rely on S31803 tube fittings whenever structural integrity, long-term reliability, and chemical durability are required, making them indispensable for demanding industrial operations.
