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Okoye Nickel Alloys, a premier manufacturer and supplier in Kinshasa, Congo, specializes in providing high-quality Super Duplex Steel Screws. Renowned for their exceptional strength and corrosion resistance, these screws are ideal for applications in demanding environments such as offshore, chemical, and marine industries. Engineered to withstand extreme conditions, Okoye Nickel Alloys’ Super Duplex Steel Screws offer superior durability, ensuring long-lasting performance and reliability. Trust Okoye Nickel Alloys for cutting-edge fastening solutions tailored to meet your most rigorous industrial requirements.
Super duplex steel screws are typically made of 25% chromium, 7% nickel and 4% molybdenum, with the addition of nitrogen for increased strength They offer excellent mechanical properties, such as high tensile strength, yield strength and toughness. Their two-phase microstructure provides exceptional resistance to pitting, crevice corrosion and stress corrosion cracking. Advantages include excellent durability in harsh environments, making it ideal for the marine, chemical and oil and gas industries. Their stable performance in high chloride environments ensures durability and reliability in complex applications.
| Standard | DIN, ASTM, BS and all International Standards |
| Specifications | ASTM A479 & ASME SA479 |
| Length | 3 to 200 MM |
| Super Duplex Steel 2207 Machine Screws Size | M1.6 To M12 |
| Phosphorus | Sulphur | Silicon | Carbon | Manganese | Nickel | Molybdenum | Nitrogen | Copper | Chromium |
|---|---|---|---|---|---|---|---|---|---|
| 0.035 % max | 0.02 % max | 0.80 % max | 0.03% Max | 1.20 % max | 6.00 – 8.00 % | 3.00 – 5.00 % | 0.24 – 0.32 % | 0.50 % max | 24.0 – 26.0 % |
| Material Product | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) | Hardness Rockwell C (HR C) |
| Super Duplex Steel Screw | 760 | 550 | 15 | 32 Max |
At Okoye Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Super Duplex Steel Screws in Kinshasa, Congo, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Congo, 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.
Super duplex steel screws are widely used in applications requiring high corrosion resistance and strength, such as marine, medical systems, and oil and gas industry Ideal for fastening applications in offshore platforms, heat exchangers and desalination plants, where exposure to chlorides and hard surfaces are common Besides, these screws are used in pressure vessels, tanks and pipelines because of their ability to withstand high pressures and extreme temperatures , ensuring long-term reliability and critical safety.
