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Hamad Fasteners, located in Riyadh, Saudi Arabia, has built a solid reputation as a manufacturer and supplier of top-notch industrial fasteners designed to thrive in challenging environments. Our Duplex Steel S31803 Stud Bolts are crafted for outstanding strength, corrosion resistance, and durability, making them perfect for harsh industrial applications. Whether it’s in the oil and gas sector, petrochemical industry, marine operations, or chemical processing, these bolts provide a reliable solution for corrosive and high-stress situations. Adhering to global quality standards, S31803 fasteners from Hamad Fasteners ensure long-lasting performance and dependability, even under demanding conditions.
These Duplex Steel S31803 Stud Bolts are made up of about 22% chromium, 5–6.5% nickel, 3% molybdenum, and a well-balanced combination of austenitic and ferritic phases. This unique alloy structure offers remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking caused by chlorides. Typically, these bolts boast a tensile strength ranging from 620–880 MPa and a yield strength of around 450–550 MPa. Plus, S31803 maintains excellent weldability and toughness, preserving its mechanical and chemical properties in environments with high salinity, chemical exposure, and moderate to high temperatures.
| 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 % |
| 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 |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
You’ll often find Duplex Steel S31803 Stud Bolts in offshore platforms, heat exchangers, pressure vessels, pipelines, desalination plants, and marine equipment. Their impressive strength and corrosion resistance make them the go-to choice for flanged joints and structural connections that face aggressive chemicals and seawater. These bolts not only outperform standard stainless steels in mechanical performance but also help reduce component weight and maintenance costs. For engineers looking for long-term, cost-effective solutions in corrosive and mechanically demanding environments, S31803 is the material of choice.
At Hamad Fasteners, Duplex Steel Stud Bolts S31803 are meticulously packaged to ensure safe and secure delivery. Each bolt is individually inspected and wrapped in protective material to prevent damage during transit. We use durable, high-quality packaging materials that safeguard against environmental factors such as moisture and impact. The bolts are organized in sturdy, labeled cartons for easy identification and handling. Our packaging process guarantees that your Duplex Steel Stud Bolts S31803 arrive in pristine condition, ready for immediate use.
Hamad Fasteners is one of the Industrial suppliers and manufacturers of quality fasteners in Riyadh, Saudi Arabia, that has spent more than 12 years serving various industries.
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