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MUKAU FASTENERS, a reputable manufacturer and supplier located in Kinshasa, Congo, proudly offers top-notch Duplex Steel Stud Bolts S31803. These bolts are celebrated for their exceptional strength, impressive corrosion resistance, and long-lasting durability. Designed to meet the highest industrial standards, they find their place in tough environments like offshore, chemical, and marine industries. The Duplex Steel Stud Bolts S31803 from MUKAU FASTENERS blend remarkable mechanical strength with outstanding resistance to stress corrosion cracking and pitting, making them perfect for critical fastening tasks in aggressive and high-pressure settings.
Duplex Steel Stud Bolts S31803 are made up of about 22% chromium, 5–6% nickel, 3% molybdenum, along with nitrogen additions that boost their corrosion resistance. This well-balanced microstructure of austenite and ferrite gives them high tensile and yield strength, excellent toughness, and resistance to chloride-induced stress corrosion cracking. These bolts showcase superior mechanical performance, with yield strength nearly double that of standard austenitic stainless steels, while also offering good weldability and formability.
| 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.
Duplex Steel Stud Bolts S31803 are widely utilized in industries that demand high mechanical strength and corrosion resistance, such as chemical processing, marine engineering, oil and gas, and desalination plants. They are particularly suited for pressure vessels, heat exchangers, pumps, and pipeline systems that are exposed to harsh chloride environments. Additionally, these bolts are employed in construction, power generation, and the paper industry for critical fastening applications that require both durability and reliability in corrosive or high-stress conditions.
At Mukau 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.
Mukau Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kinshasa, Congo, with over 8 years of experience serving global industries.
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