Home > Duplex Steel > Duplex Steel S31803 Tubing
Mumbai-based Jyoti Steels is a well-known manufacturer and supplier of Duplex Steel S31803, a high-strength alloy renowned for its higher strength and resistance to corrosion. With a firm commitment to quality and accuracy, Jyoti Steels supplies products that adhere to international standards and cater to critical sectors like oil & gas, marine, chemical processing, and power generation. Their Duplex S31803 products cover sheets, plates, pipes, tubes, and fittings, with the capability to operate efficiently under harsh conditions. Jyoti Steels is a well-known brand in local and global markets for duplex stainless steel solutions.
Duplex Steel S31803 comprises around 21–23% Chromium, 4.5–6.5% Nickel, 2.5–3.5% Molybdenum, and 0.14–0.2% Nitrogen, with the balance being Iron. Minor constituents are Manganese (≤2%) and Silicon (≤1%). This alloy possesses high tensile strength of 620–880 MPa, yield strength of about 450 MPa, and elongation of 25–30%. It has a density of 7.8 g/cm³ and a melting point of about 1350°C. The duplex structure of ferrite and austenite phases with balanced composition provides superior resistance to pitting, stress corrosion cracking, and general corrosion and is therefore ideal for high-pressure and chloride-containing environments.
| 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 Jyoti Steels, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Tubing in Mumbai, India, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the India, 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 is widely applied where there is a need for high mechanical strength and superior corrosion resistance. In the oil and gas sector, it is applied in pressure vessels, pipelines, and offshore platforms. Marine uses include propeller shafts, seawater cooling systems, and desalination plant applications. It is also utilized on a large scale in chemical processing for heat exchangers, tanks, and chemical transport systems. Power stations and pulp & paper mills take advantage of its erosion resistance and corrosion resistance in hostile conditions. Its weldability, strength in fatigue, and toughness qualify S31803 as the perfect choice for structural parts in aggressive industrial environments.
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