Home > Duplex Steel > Duplex Steel S31803 Tube Fittings
For businesses in Safat and across Kuwait operating in demanding sectors, Mirza Tube Fittings stands as a trusted local source for high-performance components. We specialize in supplying and manufacturing Duplex Steel S31803 Tube Fittings, offering a robust solution engineered to withstand the region’s challenging industrial environments. Our commitment is to provide reliable, durable fittings that ensure integrity and longevity in your critical piping systems, backed by our presence and expertise right here in Safat.
Duplex Steel S31803 achieves an impressive balance, combining the best qualities of austenitic and ferritic steels. Its composition, rich in chromium, nickel, molybdenum, and nitrogen, grants it exceptional strength and toughness. This alloy offers a tensile strength that is approximately double that of standard austenitic stainless steels, along with excellent resistance to stress corrosion cracking. This superior mechanical performance makes it a fundamentally stronger and more resilient choice for demanding 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 Mirza Tube Fittings, we are the largest supplier, manufacturer, and exporter of Duplex Steel S31803 Tube Fittings in Safat, Kuwait. Our advanced manufacturing facilities, strategically positioned in the Kuwait, 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.
The exceptional properties of Duplex Steel S31803 Tube Fittings make them ideal for severe conditions. They are extensively used in the oil and gas industry for offshore platforms and pipelines, where resistance to corrosive seawater and chlorides is paramount. Beyond energy, these fittings are essential in chemical processing plants, petrochemical refineries, and desalination units, effectively handling aggressive acids, caustics, and high-pressure fluids. Their strength and durability also make them a wise choice for pulp and paper production and other industrial settings where reliability cannot be compromised.
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