Home > Duplex Steel > Duplex Steel S31803 Tube Fittings
Rudra Tubefittings, a reputable manufacturer and supplier located in Kolkata, India, specializes in high-quality Duplex Steel S31803 Tube Fittings. These fittings are crafted for outstanding corrosion resistance, strength, and reliability, making them perfect for demanding industrial applications. They ensure secure, leak-proof connections in critical fluid and gas systems, delivering efficient performance even in tough environments. At Rudra Tubefittings, advanced manufacturing techniques, precision engineering, and strict quality control come together to produce durable, dimensionally accurate, and high-performance products. Their Duplex Steel S31803 Tube Fittings are widely utilized across various industries that require robust, corrosion-resistant solutions capable of withstanding high pressures, chloride-rich media, and challenging operating conditions.
Made from a balanced austenitic-ferritic stainless steel alloy that includes chromium, nickel, and molybdenum, Duplex Steel S31803 Tube Fittings offer remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking. The unique duplex microstructure provides nearly double the strength of traditional austenitic stainless steels while ensuring excellent toughness, ductility, and mechanical stability. S31803 performs exceptionally well in chloride-rich and harsh chemical environments, showcasing good weldability and dimensional stability. These features guarantee reliable long-term performance in high-pressure, high-temperature, and corrosive service conditions.
| ELEMENT | DUPLEX 31803 |
| NI | 4.50 – 6.50 |
| C | 0.030 max |
| MN | 2.00 max |
| P | 0.030 max |
| S | 0.020 max |
| SI | 1.00 max |
| CR | 22.0 – 23.0 |
| MO | 3.0 – 3.5 |
| N | 0.14 – 0.20 |
| FE | 63.72 min |
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
At Rudra Tube Fittings, we are the largest supplier, manufacturer, and exporter of Duplex Steel S31803 Tube Fittings in Kolkata, Kolkata. Our advanced manufacturing facilities, strategically positioned in the Kolkata, enable us to deliver high-quality solutions to meet your specific requirements. With a robust inventory of over 16,000 tons of top-grade materials, we are well-equipped to fulfil your needs promptly. Our commitment to excellence and efficiency ensures we always have the available stock to support your demands.
| STANDARD | UNS | WERKSTOFF NR. |
| Duplex S31803 | S31803 | 1.4462 |
| Straight Union | Bulkhead Union | Reducing Union | Union Elbow | Union Cross | Union Tee |
| Male Connector | Female Connector | Male Bulkhead Connector | Female Bulkhead Connector | Male to Male Elbow | Male Elbow |
| Female Elbow | Male to Female Elbow | Male Run Tee | Male Branch Tee | Female Branch Tee | Female Run Tee |
| Male Adaptor | Female Adaptor | Tube End Reducer | OD Plug | Bulkhead Lock Nut | OD Cap |
Contact us to get a quick quote for your requirement.
Duplex Steel S31803 Tube Fittings are extensively used in industries that require strong, corrosion-resistant, and durable connections. They are particularly suited for chemical and petrochemical processing, offshore and marine applications, and oil and gas systems that are exposed to seawater and chloride-laden environments. Power generation, desalination plants, and heat exchangers depend on them for lasting durability and mechanical integrity. Moreover, Duplex Steel S31803 Tube Fittings are also employed in high-pressure instrumentation lines and wastewater treatment systems, ensuring they meet the rigorous demands of various applications.
Please feel free to contact us if you need any further information or for enquiry.
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Standard : ASTM A276, A479 / ASME SA276, SA479
Thickness : 0.6 mm THK to 6.00 mm THK
Size Range : 1/16” 1/2” & 1.5MM to 38.1MM
Outer Diameter : 6.00 mm to 60.00 mm