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Punit Fasteners is a trusted manufacturer and supplier of Super Duplex Steel Stud Bolts in Delhi, India. These bolts are made from high-grade Super Duplex materials for superior performance in corrosive and high-stress conditions. They are designed to handle extreme loads and aggressive chemicals, making them fit for the marine, offshore, and petrochemical sectors. Punit Fasteners uses top technology and thorough testing to ensure accurate dimensions, mechanical strength, and a long lifespan. Customers trust our products for their durability and reliability in challenging industrial applications where failure is not an option.
Super Duplex Steel Stud Bolts are made up of about 25% chromium, 7% nickel, 3.5% molybdenum, and nitrogen, with small additions of manganese and tungsten. They can achieve tensile strengths of up to 1000 MPa and yield strengths above 700 MPa. With strong resistance to chloride-induced stress corrosion cracking and pitting, these bolts keep their structural integrity under heavy loads and corrosive environments. Their solid mechanical properties make them ideal for heavy operations where both strength and corrosion resistance are essential for safe and long-lasting fastening.
| 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 Stud Bolts are extensively used in chemical plants, offshore oil platforms, desalination systems, and subsea equipment. They are key for flanged connections, structural joints, and pipeline supports, especially in high-salinity and chemical exposure environments. Their high tensile strength and durability are suitable for high-pressure vessels and heat exchangers. Additionally, they are used in fire-fighting systems, seawater cooling plants, and reactors, where regular steel fasteners may corrode or fail. Their outstanding durability ensures secure connections even in highly corrosive and extreme operational conditions.
At Punit Fasteners, we make sure that our Super Duplex Steel stud bolts are packed in the most appropriate manner. Every stud bolt is covered with protective materials to avoid scratching, rusting, and contamination of the bolt during transportation. We use durable cartons and provide custom packaging to suit your needs and preferences in the best way possible. Clear labeling and packing also help in identification and handling of the products, which is a proof of our high quality products in good condition.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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