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Puri Fasteners, a leading manufacturer and supplier located in Chennai, specializes in high-quality Super Duplex Steel Bolts S32750, crafted for tough industrial applications. Known for their exceptional strength, impressive corrosion resistance, and long-lasting durability, these bolts are built to endure extreme conditions, including high pressure and environments rich in chlorides. With a commitment to precision and adherence to strict international standards, Puri Fasteners’ S32750 bolts deliver dependable and enduring fastening solutions. They find extensive use in sectors like oil & gas, marine, chemical, and power generation, ensuring mechanical stability, safety, and performance—making them a top choice for critical infrastructure and high-performance industrial projects.
Super Duplex Steel Bolts S32750 are made from a high-chromium, high-molybdenum alloy that features a balanced austenitic-ferritic microstructure, typically comprising 25% chromium, 4% molybdenum, and 7% nickel. These bolts boast remarkable mechanical properties, including high tensile and yield strength, excellent fatigue resistance, and superior protection against pitting, crevice corrosion, and chloride stress corrosion cracking. Their dual-phase structure offers outstanding toughness and stability in harsh chemical environments and elevated temperatures, ensuring reliable long-term performance in demanding industrial settings.
| 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.
These Super Duplex Steel Bolts S32750 are widely utilized in offshore platforms, subsea systems, and marine engineering due to their exceptional resistance to seawater corrosion. In the oil and gas sector, they are commonly found in pipelines, pumps, heat exchangers, and pressure vessels. Chemical and petrochemical plants depend on these bolts for equipment and structures that face acidic or chloride-rich conditions. Moreover, they are essential in power generation, desalination plants, and other heavy industrial applications where high strength, durability, and corrosion resistance are crucial. These bolts guarantee safety and reliability in every application.
At Puri Fasteners, our Super Duplex Steel Bolts S32750 are carefully installed to ensure safety and optimal quality. Each bolt is individually inspected and wrapped in corrosion resistant packaging, then placed in sturdy, carefully labeled boxes. Boxes are clearly marked with item details and sizes for easy handling and storage. We prioritize safe and efficient deliveries, so our packaging also includes shock absorbers to prevent damage during transit, and to ensure your fasteners arrive in edible condition deaf
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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