Home > Duplex Steel > Duplex Steel S31803 Pipe
Elvis Nickel Alloys, a prominent manufacturer and supplier located in Houston, USA, specializes in high-quality Duplex Steel S31803 Pipes, designed to excel in tough environments. Duplex S31803 (UNS S31803) is a nitrogen-enhanced duplex stainless steel that boasts a well-balanced austenitic-ferritic microstructure, delivering impressive strength and outstanding corrosion resistance, especially in chloride-rich and acidic settings. These pipes come in various forms, including seamless, welded, ERW, and fabricated, and are produced in line with international standards like ASTM A790 and ASME SA790. Industries such as oil & gas, chemical processing, marine, and desalination frequently rely on S31803 pipes.
Duplex Steel S31803 Pipes are made up of roughly 21–23% chromium, 4.5–6.5% nickel, 2.5–3.5% molybdenum, 0.14–0.20% nitrogen, with the remainder being iron and trace elements. This unique blend provides exceptional resistance to pitting and crevice corrosion, along with superior resistance to chloride stress corrosion cracking. These pipes boast a tensile strength of ≥620 MPa, yield strength of ≥450 MPa, and a good elongation of around 25%, offering double the strength of typical austenitic stainless steels. Additionally, Duplex S31803 is known for its high toughness and excellent weldability, performing well in both sub-zero and high-temperature conditions.
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 Elvis Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Pipe in Texas, USA, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the USA, 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 Pipes S31803 are widely used in industries requiring high strength and corrosion resistance. Common applications include chemical processing, oil and gas, marine environments, and wastewater treatment. Their robustness makes them ideal for handling aggressive chemicals, high-pressure systems, and extreme temperatures. Additionally, these pipes are employed in the construction of heat exchangers, pressure vessels, and pipelines where durability and resistance to stress corrosion cracking are critical. Their versatility ensures reliable performance across diverse and challenging environments.
