Home > Duplex Steel > Duplex Steel S31803 Tube Fittings
Iyle Tube Fittings, located in South Africa, is a reliable manufacturer and supplier of **Duplex Steel S31803 Tube Fittings**. These fittings are crafted for high-performance, corrosion-resistant, and durable connections in piping and instrumentation systems. They ensure leak-proof, secure connections for various applications, including chemical, industrial, and marine, providing dependable operation even in tough conditions. Made from top-quality Duplex Steel S31803, these fittings boast excellent resistance to stress corrosion cracking, pitting, and crevice corrosion, all while maintaining impressive mechanical strength. Iyle Tube Fittings is committed to delivering precision-engineered, quality-assured products to sectors such as chemical processing, petrochemicals, oil and gas, power generation, and marine applications.
The Duplex Steel S31803 Tube Fittings are primarily made up of iron, chromium (21%), nickel (5–6%), molybdenum (3%), and nitrogen, which together provide outstanding corrosion resistance, high tensile and yield strength, and remarkable toughness. They have a tensile strength ranging from 620 to 850 MPa and a yield strength between 450 and 620 MPa, ensuring they perform reliably in high-pressure, high-temperature, and chemically aggressive environments. Their sturdy design makes them perfect for critical piping and instrumentation applications.
| 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 Iyle Tube Fittings, we are the largest supplier, manufacturer, and exporter of Duplex Steel S31803 Tube Fittings in South Africa, Cape Town. Our advanced manufacturing facilities, strategically positioned in the Cape Town, 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.
These Duplex Steel S31803 Tube Fittings are widely utilized in industries that demand corrosion-resistant, durable, and high-strength connections. In chemical and petrochemical plants, they are commonly found in process lines, reactors, and instrumentation systems that come into contact with chloride-containing media. The oil and gas sector employs them in pipelines, offshore installations, and high-pressure systems. They are also vital in power generation, marine engineering, and other industrial fields where mechanical strength, corrosion resistance, and reliability are paramount. Their blend of toughness, precision, and durability guarantees safe and efficient performance in even the most demanding applications.
Duplex Steel S31803 Tube Fittings are widely used in applications requiring high strength and corrosion resistance, such as oil and gas, chemical processing, petrochemical, marine applications and are ideal for offshore platforms, heat exchangers, compression pottery and desalination plant piping systems Significantly these fittings are also used in water treatment, pulp and paper manufacturing, and electricity generation, providing excellent durability in harsh and corrosive environments, . and highly resistant to pitting, cracks, rust and erosion.
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