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Themban Nickel Alloys is the leading manufacturer and distributor of Duplex Steel S31803 tubing in Cape Town , South Africa. Renowned for its superior corrosion resistance, strength, and durability, Duplex Steel S31803 is ideal for a wide range of demanding industrial applications. At Themban Nickel Alloys, we pride ourselves on delivering top-quality products that meet the highest industry standards. Our extensive inventory and commitment to customer satisfaction make us the go-to supplier for Duplex Steel S31803 tubing in the region. Partner with us for reliable and efficient solutions tailored to your specific needs.
| Specifications | : | ASTM A789 ASME SA789 |
| Dimensions | : | ASTM, ASME and API |
| Tube Size | : | 1/2″NB TO 12 “NB IN |
| Specialized in | : | Large Diameter Size |
| Schedule | : | SCH20, SCH30, SCH40, STD, SCH80 |
| Type | : | Seamless / ERW / Welded / Fabricated |
| Form | : | Round, Hydraulic Etc |
| Length | : | Single Random, Double Random & Cut Length. |
| End | : | Plain End, Beveled End, Treaded |
| S31803 | C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 – 3.5 | 22.0 – 23.0 | 0.03 | 4.5 – 6.5 | 0.14 – 0.2 | Bal |
| S31803 | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
The composition of Duplex Steel S31803 Tubing from Themba Nickel Alloys includes a balance of iron, along with 21% chromium, 5–6.5% nickel, 2.5–3% molybdenum, and trace amounts of nitrogen, manganese, and silicon. This unique mix gives the tubing remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in environments rich in chlorides and oxidizing agents. With mechanical properties that boast a tensile strength of about 620–880 MPa and a yield strength of 450–620 MPa, along with high toughness, ductility, and fatigue resistance, this tubing is built to perform reliably under extreme conditions of temperature, pressure, and chemical exposure.
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Duplex Steel S31803 Tubing is widely sought after in industries that demand corrosion-resistant, high-strength, and durable piping solutions. It’s perfect for applications in chemical processing plants, oil and gas pipelines, desalination facilities, heat exchangers, marine and offshore structures, and power generation systems. This tubing not only maintains its structural integrity but also resists scaling, deformation, and corrosion, ensuring long-term durability even in aggressive environments. With Themba Nickel Alloys’ Duplex Steel S31803 Tubing, you can count on safe, high-performance, and dependable solutions, making it a top choice for critical industrial applications worldwide.
