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Puri Fasteners, a well-respected manufacturer and supplier located in Chennai, focuses on crafting top-notch Super Duplex Steel Nuts that are built to endure the toughest corrosive and high-pressure industrial settings. Utilizing cutting-edge manufacturing techniques and strict quality control, these nuts offer remarkable strength, outstanding corrosion resistance, and durability that lasts. Renowned for their ability to resist pitting, crevice corrosion, and stress corrosion cracking, Super Duplex Steel Nuts are perfect for demanding sectors such as offshore, marine, petrochemical, chemical processing, desalination, and power generation. With a strong dedication to precision, timely delivery, and ensuring customer satisfaction, Puri Fasteners has established itself as a reliable partner for high-performance fastening solutions.
Typically made from grades like Super Duplex 2507, these nuts contain about 25% chromium, 7% nickel, 4% molybdenum, and nitrogen, which boosts their strength and corrosion resistance. This unique blend allows them to withstand harsh and chloride-rich environments. They showcase high tensile and yield strength, excellent fatigue resistance, and remarkable toughness, even in extreme temperatures and pressures. Thanks to their dual-phase austenitic-ferritic microstructure, they maintain mechanical stability, making them ideal for critical industrial applications that demand both strength and long-lasting durability.
| 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 Steel Nuts are widely used in industries where both corrosion resistance and mechanical strength are crucial. In the offshore oil and gas sector, they are used in subsea equipment, pipelines, risers, and platform structures exposed to harsh seawater conditions. In marine engineering, they support shipbuilding, underwater installations, and desalination systems. Chemical and petrochemical plants rely on these nuts for pumps, valves, reactors, and heat exchangers operating in corrosive environments. Additionally, they are used in power generation, mining operations, pulp and paper industries, and structural applications that demand long-term reliability, high safety, and superior resistance to environmental degradation.
At Puri Fasteners, we make sure that our Super Duplex Steel nuts are packed in a very special manner. Every nut is packed separately in protective materials to avoid any impact such as mechanical, chemical or microbial on the nuts during transportation. Our cartons are made of durable material and we provide customized packaging services for your products. Proper labeling and packing also help in identification and handling of the products, thus showing our seriousness in providing quality products in good 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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