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Ashraf Nickel Alloys stands out as a reliable manufacturer and supplier of Super Duplex Steel Screws in Riyadh, Saudi Arabia. We provide high-performance fastening solutions tailored for industries that require outstanding strength and resistance to corrosion. Thanks to its unique dual-phase microstructure, Super Duplex stainless steel boasts remarkable mechanical strength and excellent protection against pitting, crevice corrosion, and stress corrosion cracking. Our screws are meticulously crafted in various sizes, grades, and finishes, adhering to ASTM, ASME, DIN, and ISO standards for global use. Built to withstand extreme conditions, these screws find their place in marine engineering, desalination, offshore oil & gas platforms, petrochemical plants, and structural assemblies.
Super Duplex Steel is typically composed of 25% chromium, 7% nickel, 4% molybdenum, along with trace elements like nitrogen, manganese, and silicon, which together provide outstanding corrosion resistance and strength. It boasts a yield strength of around 550 MPa and an ultimate tensile strength of 800 MPa, making it nearly twice as strong as standard austenitic stainless steels. With a Pitting Resistance Equivalent Number (PREN) exceeding 40, it performs reliably in environments rich in chlorides and acids. These screws also demonstrate excellent fatigue strength, low thermal expansion, and good weldability, making them a preferred choice for critical applications where durability is essential.
| 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 Ashraf Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Super Duplex Steel Screws in Riyadh, Saudi Arabia, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Saudi Arabia, 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 perfect for offshore platforms, subsea equipment, and desalination plants, where they constantly face seawater and harsh chemicals. They are extensively used in oil & gas refineries, chemical processing plants, and petrochemical industries for secure fastening in challenging environments. In the marine sector, these screws are favored for shipbuilding, boat fittings, and coastal infrastructure. Their impressive strength and corrosion resistance also make them ideal for heat exchangers, pipelines, and other critical applications where reliability is a must.
