Home > Duplex Steel > Duplex Steel S31803 Stud Bolts
Chanathip Nickel Alloys & Plates manufactures top-quality Duplex Steel S31803 stud bolts in Bangkok, Thailand. These threaded fasteners are produced in various sizes, lengths, and thread forms according to ASTM A479 and ASME B18.2.1 standards. Our S31803 stud bolts are used in high-pressure flanged connections in chemical plants, offshore structures, and pipelines. Made from forged bar stock and precision threading techniques, our stud bolts ensure strength, dimensional accuracy, and corrosion resistance. Each batch comes with mechanical and chemical test reports, confirming traceability and compliance with customer requirements.
| Grade | Duplex Steel UNS S31803 / S31803 |
| Specifications | ASTM A 479 ASME SA 479 |
| Dimension | DIN, ASTM, BS and all International Standards |
| Length | 3mm to 200mm |
| Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Types | Threaded Rod, Class A double ended stud, Tie Rod, Double Ended Stud, Stud Bolts, Bronze Hex Studs, Threaded Studs etc |
| 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 Stud Bolts 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.
S31803 stud bolts are used to assemble flanged joints in pressure vessels, pipelines, and valves in harsh environments. Common applications include offshore oil rigs, seawater cooling systems, chemical reactors, desalination equipment, and heat exchangers. Their resistance to corrosion and mechanical fatigue makes them ideal for systems exposed to vibration, pressure cycling, or high salinity. They are often used with Duplex nuts and washers to maintain consistent clamping force. These stud bolts provide dependable fastening in critical applications where failure is not an option.
