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Victor Nickelalloys, located in Abuja, Nigeria, has earned a solid reputation as a reliable manufacturer and supplier of top-notch Duplex Steel S31803 Nuts. These nuts are celebrated for their precision, durability, and outstanding resistance to corrosion, making them essential for critical sectors like oil and gas, marine, chemical processing, and desalination. Designed to perform securely and lastingly in tough environments, their Duplex Steel S31803 Nuts can withstand seawater, harsh chemicals, and high pressure while keeping their mechanical strength and structural integrity intact. With cutting-edge technology and rigorous quality control in their manufacturing process, these nuts guarantee safety and reliability for demanding industrial and marine applications.
The composition of Duplex Steel S31803 Nuts includes about 22% chromium, 5–6% nickel, 3% molybdenum, and nitrogen, all balanced with iron. Their unique dual-phase microstructure, which combines ferrite and austenite, offers remarkable strength—almost double that of regular austenitic stainless steels—along with excellent resistance to pitting, crevice, and stress corrosion cracking. These nuts boast high tensile and yield strength, impressive fatigue resistance, and stability under mechanical and thermal stress. This blend of corrosion resistance and mechanical properties makes them perfect for high-performance fastening tasks in aggressive environments.
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Material
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Specification
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Standards |
Size
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Length
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Duplex Steel S31803 |
IS BS ASTM |
ASTM / ASME – A/ SA 479 / 479
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3 mm |
M02 to M30 |
| Cr | N | Ni | C | Mn | Si | P | S | Mo | |
|---|---|---|---|---|---|---|---|---|---|
| S31803 | min: 21.0 max: 23.0 | min: 0.08 max: 0.20 | min: 4.5 max: 6.5 | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | min: 2.5 max: 3.5 |
| S32205 | min: 22.0 max: 23.0 | min: 0.14 max: 0.20 | min: 4.5 max: 6.5 | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | min: 3.0 max: 3.5 |
Grade | Tensile Strength (MPa) min | Elongation (% in 50mm) | Yield Strength 0.2% Proof (MPa) min | Hardness Rockwell C (HR C) |
|---|---|---|---|---|
UNS-S 31803 | 650-880 | 25 | 448 | |
UNS-S 32205 | 621 | 25 | 448 | 21 max |
At Victor Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Nuts in Abuja, Nigeria, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Nigeria, 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 Steel S31803 Nuts find extensive use in offshore platforms, shipbuilding, and marine systems where they frequently encounter seawater and corrosive chemicals. They’re also a great fit for chemical processing plants, desalination units, heat exchangers, and piping systems that need secure, corrosion-resistant fastening solutions. Additionally, they play a vital role in oil and gas equipment, pumps, and power generation setups. Thanks to their durability, strength, and long service life, Duplex Steel S31803 Nuts deliver dependable, maintenance-free performance for industries facing tough conditions.