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Chanathip Nickel Alloys & Plates is a renowned Duplex Steel S31803 Tubing Manufacturer in Bangkok, Thailand. We offer precision-crafted S31803 seamless and welded tubing appropriate for high-pressure and corrosive services. Made to ASTM A789/A790 standards, our tubes have superior mechanical properties and corrosion resistance. In different sizes, wall thickness, and finishes, Duplex S31803 tubing is suitable for structural, instrumentation, and fluid conveying in aggressive conditions. All tubing is tested for pressure, dimensions, and surface quality, making it suitable for critical industrial processes.
| 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 % |
At Chanathip Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Tubing in Bangkok, Thailand, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Thailand, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
Duplex S31803 Tubing is used in heat exchangers, condensers, chemical injection lines, instrumentation systems, and offshore platforms. Its superior corrosion resistance makes it suitable for brine lines, seawater cooling systems, and acid handling applications. The tubing is also used in food processing, power plants, and pharmaceutical equipment requiring both strength and hygiene. S31803’s mechanical strength permits thinner tube walls, minimizing overall system weight and cost of material. It operates dependably under fluctuating temperatures, vibration, and dynamic loads, making it well suited for long-term, maintenance-free tubing systems in harsh industrial environments.
