Home > Duplex Steel > Duplex Steel S31803 Tube Fittings
For businesses in Canberra and the surrounding region seeking exceptional performance in demanding environments, Warner Tube Fittings stands as your local, trusted partner. We specialise in supplying high-quality Duplex Steel S31803 Tube Fittings, engineered to bridge the gap between standard stainless steels and super austenitic grades. Our commitment is to provide components that deliver outstanding strength and corrosion resistance, ensuring the integrity and longevity of your critical fluid and gas systems with reliable, local support.
The strength of Duplex Steel S31803 lies in its unique metallurgical composition, a near-equal blend of austenite and ferrite phases. This balanced structure provides a remarkable combination of high tensile and yield strength, far surpassing that of common 300 series stainless steels. Alongside this robust mechanical performance, it offers excellent toughness and good ductility, making it a formidable material that stands up to significant stress and pressure without compromising its structural integrity.
| 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 Warner Tube Fittings, we are the largest supplier, manufacturer, and exporter of Duplex Steel S31803 Tube Fittings in Canberra, Australia. Our advanced manufacturing facilities, strategically positioned in the Australia, 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 impressive capabilities of Duplex Steel S31803 Tube Fittings make them ideal for challenging applications where both strength and corrosion resistance are non-negotiable. You will commonly find them in critical systems for offshore oil and gas platforms, chemical processing plants, and in pipelines handling seawater or other aggressive media. Their resistance to chloride-induced stress corrosion cracking makes them a perfect choice for desalination units, heat exchangers, and various demanding industrial and marine projects, ensuring safety and reliability where failure is not an option.
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