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At Rinku Fasteners, located in the dynamic industrial landscape of Kolkata, we combine precision engineering with a personalised approach to quality. Our Super Duplex Steel Stud Bolts are crafted to deliver exceptional performance in some of the toughest working conditions. Every stud bolt is manufactured with care, ensuring consistency, durability, and long-term reliability. We are committed to supporting industries that rely on secure, high-performance fastening solutions that can withstand extreme environments, helping them build safer and more efficient systems.
Super Duplex Steel Stud Bolts are produced from a balanced alloy containing chromium, molybdenum, and nitrogen, offering remarkable resistance to pitting, crevice corrosion, and chloride stress cracking. Their austenitic–ferritic structure provides outstanding tensile strength, high yield strength, and excellent fatigue performance. They maintain structural stability across fluctuating temperatures and pressures, making them ideal for demanding operational conditions. The combination of superior metallurgical composition and robust mechanical characteristics ensures these stud bolts deliver dependable fastening where both strength and corrosion resistance are essential.
| 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 used in a variety of demanding industries and applications. In chemical processing, they are able to deal with cases of contact with aggressive chemicals and high pressures. In marine applications, they are immune to the effects of sea water, thus they are very reliable. In the oil and gas industry, they offer secure fastening where stress is high. Also, Super Duplex Steel stud bolts are applied in power generation and construction industries due to their superior performance in harsh conditions.
Super Duplex Steel Stud Bolts are widely used in environments that require exceptional strength and corrosion resistance. They are essential in offshore oil and gas platforms, marine engineering projects, desalination plants, and chemical processing facilities. Their reliability in chloride-rich, high-pressure, and corrosive conditions makes them ideal for heat exchangers, pressure vessels, pumps, flanges, and critical piping systems. In heavy structural assemblies, they help maintain secure joints under mechanical stress. Engineers and project teams trust these stud bolts for their ability to ensure long-lasting, fail-safe connections that support overall system safety and operational efficiency.
Rinku Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kolkata, India, with over 8 years of experience serving global industries.
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