Home > Duplex Steel > Duplex Steel S31803 Tube Fittings
Curtis Tube Fittings, based in Manila, Philippines, stands out as a leading manufacturer and supplier of top-notch fluid control solutions, with a special focus on Duplex Steel S31803 Tube Fittings. These fittings are celebrated for their remarkable corrosion resistance, impressive strength, and durability, ensuring reliable, leak-free connections even in the toughest industrial and offshore piping systems. At Curtis Tube Fittings, precision engineering, cutting-edge manufacturing, and rigorous quality control come together to produce components that are built to last and perform exceptionally well. Their Duplex Steel S31803 Tube Fittings find extensive use in the chemical, petrochemical, oil and gas, and marine sectors, providing safe, efficient, and robust solutions for transporting fluids under high pressure and in corrosive environments.
Made primarily from S31803 duplex stainless steel, Duplex Steel S31803 Tube Fittings blend austenitic and ferritic phases to deliver outstanding corrosion resistance, mechanical strength, and resilience against stress corrosion cracking. With precision-machined ends, threads, and joints, these fittings ensure tight, leak-free connections. They excel in durability, standing up to high pressure, thermal cycling, and exposure to harsh or corrosive fluids. These mechanical properties make Duplex Steel S31803 Tube Fittings perfect for industrial applications that demand reliable, long-term performance, structural integrity, and efficient fluid transport in challenging chemical, marine, and offshore settings.
| 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 Curtis Tube Fittings, we are the largest supplier, manufacturer, and exporter of Duplex Steel S31803 Tube Fittings in Manila, Philippines. Our advanced manufacturing facilities, strategically positioned in the Philippines, 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.
Venton Tube Fittings is the premier supplier, manufacturer and exporter of Duplex Steel S31803 Tube Fittings in Manila, Philippines. Our strategic manufacturing units placed in the Philippines allow us to supply high-quality solutions customized to your needs. We value Efficiency and Excellence. Ensuring that our products meet the highest industry standards. Maintaining a well-stocked inventory we are always ready to ship orders in time and reliably. Our dedication to customer satisfaction compels us to deliver strong and reliable solutions for a wide range of industrial uses.
In industries that require robust, corrosion-resistant, and high-performance piping solutions, Duplex Steel S31803 Tube Fittings are a go-to choice. In chemical and petrochemical plants, they manage aggressive fluids with safety and efficiency. They play a crucial role in oil and gas, offshore, and marine applications, ensuring secure, leak-free pipelines and process systems. In power generation, industrial machinery, and process plants, these fittings provide dependable and long-lasting fluid connections. They are also utilized in water treatment, manufacturing, and various other applications where durability and performance are key.
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