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Tanvir Nickel Alloys, based in Cairo, Egypt, is a top-notch manufacturer and supplier known for its high-quality Super Duplex Steel Fasteners. These fasteners are celebrated for their incredible strength, resistance to corrosion, and durability even in the harshest environments. Crafted with cutting-edge precision forging and threading techniques, they guarantee excellent dimensional accuracy, a smooth surface finish, and reliable mechanical performance. Tanvir Nickel Alloys supplies these Super Duplex Steel Fasteners for crucial applications across the oil and gas, chemical processing, petrochemical, and marine sectors. Their impressive mechanical strength, along with their ability to resist pitting and stress corrosion cracking, makes them perfect for demanding industrial fastening needs.
Super Duplex Steel Fasteners are made up of about 22–25% chromium, 4–6% nickel, and 3–5% molybdenum, with nitrogen and iron forming the base. They boast tensile strengths reaching up to 800–1000 MPa, yield strengths around 550–700 MPa, and an elongation of 25–30%. This alloy is known for its exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, while also offering great toughness and durability. These properties make Super Duplex Steel Fasteners ideal for high-pressure, high-temperature, and chemically aggressive environments where long-term reliability is essential.
| Specification | IS, BS, ASTM, ASME |
| Grade | Super Duplex Steel | UNS S32750 | S32760 |
| Standard | ASTM A479 ASME SA479 |
| Length | 3mm to 200mm |
| Form | Screw, Nuts, Bolts, Washers |
| Size | 3/6″ to 2″, M3 – M56, Custom Sizes |
| Application | Oil & Gas, Heat exchanger and condenser, Automobile Industry, Engineering, Power plants, Refineries & Petrochemicals, Ship building, Desalination Plants |
| 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 % |
| Grade | YS (MPa) | UTS (MPa) | % Elongation | Hardness(BHN) |
| UNS S32750 | 550 min. | 795 min. | 15 min. | 310 max. |
| UNS S32760 | 550 min. | 750 min. | 25 min. | 270 max. |
At Tanvir Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Super Duplex Steel Fasteners in Cairo, Egypt, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Egypt, 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.
These fasteners are widely utilized in industries that demand high-strength, corrosion-resistant, and durable fastening solutions. You’ll find them in oil and gas pipelines, chemical and petrochemical plants, offshore platforms, and desalination systems. In marine applications, they are used in seawater piping, structural assemblies, and shipbuilding. Moreover, power generation and industrial processing plants depend on Super Duplex Steel Fasteners for valves, flanges, and high-pressure equipment that come into contact with corrosive media. Their blend of mechanical strength, corrosion resistance, and long-lasting reliability makes them a go-to choice for many industries.