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Malik Tube Fittings stands out as a top-notch manufacturer and supplier of high-quality Duplex Steel S31803 Tube Fittings in Riyadh, Saudi Arabia. These fittings are designed with strength, durability, and impressive corrosion resistance in mind, making them perfect for tough industrial and marine environments. Crafted from premium duplex stainless steel grade S31803, they boast a well-balanced microstructure of austenite and ferrite, which ensures exceptional mechanical performance even under high pressure and corrosive conditions. Malik Tube Fittings delivers precision-engineered Duplex Steel S31803 Tube Fittings that meet international standards, guaranteeing leak-proof connections, a long service life, and dependable performance in critical piping systems.
The composition of Duplex Steel S31803 Tube Fittings includes chromium, nickel, molybdenum, and nitrogen, forming a dual-phase microstructure that merges the strength of ferritic stainless steel with the toughness of austenitic stainless steel. This unique blend offers remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking, along with high tensile and yield strength. These fittings maintain their structural integrity even when faced with fluctuating pressure and temperature, ensuring safe, efficient, and consistent operation in demanding industrial 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 Malik Tube Fittings, we are the largest supplier, manufacturer, and exporter of Duplex Steel S31803 Tube Fittings in Riyadh, Saudi Arabia. Our advanced manufacturing facilities, strategically positioned in the Saudi Arabia, 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 find extensive use in oil and gas processing, chemical and petrochemical plants, desalination facilities, offshore platforms, marine engineering, and power generation systems. They are particularly well-suited for hydraulic and instrumentation lines, fluid and gas distribution networks, and high-pressure piping assemblies that come into contact with aggressive chemicals or seawater. With their sturdy construction, straightforward installation, and maintenance-free performance, these fittings are the go-to choice for industries looking for durable, corrosion-resistant, and cost-effective tube fitting solutions that prioritize operational safety and efficiency.
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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