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Puri Fasteners, a well-respected manufacturer and supplier located in Chennai, specializes in top-notch Super Duplex Screws designed for the toughest and most corrosive industrial settings. These screws are crafted using cutting-edge technology and rigorous quality control measures, ensuring they provide outstanding strength, remarkable corrosion resistance, and top performance in environments rich in chlorides and under high pressure. Known for their durability, resistance to pitting and crevice corrosion, and long-lasting service life, Super Duplex Screws from Puri Fasteners are a go-to choice even in harsh conditions. The company caters to various sectors, including offshore, marine, chemical processing, petrochemical, desalination, and power generation, establishing itself as a reliable partner for dependable fastening solutions.
These Super Duplex Screws are made from super duplex stainless steels like 2507, which contains around 25% chromium, 7% nickel, 4% molybdenum, and nitrogen to boost strength. This carefully balanced chemical makeup offers exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-heavy environments. With high tensile and yield strength, impressive fatigue resistance, and dependable toughness even in extreme temperatures and pressures, these screws are built to last. Their unique dual-phase austenite-ferrite structure guarantees excellent mechanical stability, making Super Duplex Screws perfect for demanding applications that require superior durability and corrosion performance.
| Standard | DIN, ASTM, BS and all International Standards |
| Specifications | ASTM A479 & ASME SA479 |
| UNS S32760 Nut and Bolts Size | M3 To M56 3/6″ to 2″ |
| Length | 3 to 200 MM |
| Super Duplex Steel 2207 Machine Screws Size | M1.6 To M12 |
| Duplex Steel 2205 Washers Size | M3 To M56 3/6″ to 2″ |
| Tensile Strength(MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) | Hardness Rockwell C (HR C) | |
| Super Duplex Steel Bolts | 760 | 550 | 15 | 32 Max |
| 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 % |
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.
Super Duplex Screws are a go-to choice in industries that demand top-notch corrosion resistance and impressive mechanical strength. In the offshore oil and gas world, you’ll find them in subsea equipment, pipelines, and structural components that face the tough challenges of seawater and harsh chemicals. They shine in marine settings, making them perfect for shipbuilding, desalination plants, and underwater systems. Chemical and petrochemical facilities rely on these screws in reactors, heat exchangers, process vessels, and high-pressure situations. Plus, they’re also utilized in power generation, mining, pulp and paper production, and environmental engineering systems where long-lasting reliability and resistance to aggressive substances are absolutely crucial.
At Puri Fasteners, We make sure that our Super Duplex Steel Screws are packed with the utmost of precaution. Every screw is covered separately to avoid any damages, rust or any other contaminant that may affect the screw during transportation. We employ sturdy cartons and provide customized packaging services depending on the client’s requirements. We ensure that our products are well packed and labeled to enhance identification and handling to ensure that the end consumer receives our products in the best condition.
Puri Fasteners is a leading manufacturer and supplier of high-quality fasteners in Chennai, India, with over 8 years of experience serving global industries.
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