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Ramu Fasteners is a trusted name in Hyderabad for manufacturing and supplying Super Duplex Steel Bolts, catering to the needs of demanding industrial settings. The company prides itself on precision manufacturing, using top-notch raw materials and rigorous quality checks to guarantee reliable performance. Their Super Duplex Steel Bolts are crafted to deliver outstanding strength, corrosion resistance, and durability, even in extreme conditions. With a variety of sizes, grades, and surface finishes available, these bolts meet international standards and are highly regarded for critical applications in offshore, marine, and chemical sectors.
Super Duplex Steel Bolts are typically made from grades like UNS S32750 and UNS S32760. This alloy boasts high levels of chromium, molybdenum, and nitrogen, resulting in a well-balanced austenitic-ferritic microstructure. This unique composition gives these bolts impressive tensile and yield strength, nearly double that of regular austenitic stainless steels. They also excel in resisting pitting, crevice corrosion, stress corrosion cracking, and chloride attack, while offering superior fatigue strength and toughness.
| 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 bolts that are used in many high performance industries. In chemical processing, they are able to cope with the attack of aggressive chemicals and high pressures. In marine applications, they are able to withstand the effects of saltwater thus are long lasting. In the oil and gas industry, they offer secure fastening where there is high stress. Furthermore, Super Duplex Steel bolts are applied in power generation and construction because of their ability to withstand harsh conditions.
Super Duplex Steel Bolts find their place in environments where high salinity, pressure, and temperature are prevalent. Common applications include offshore oil and gas platforms, marine vessels, subsea equipment, desalination plants, and chemical processing facilities. They are also used in heat exchangers, pressure vessels, pipelines, and structural assemblies in coastal and industrial areas. Thanks to their high load-bearing capacity and corrosion resistance, these bolts are perfect for long-term use with minimal maintenance, ensuring safety, reliability, and durability in essential infrastructure projects.
Ramu Fasteners is a leading manufacturer and supplier of high-quality fasteners in Hyderabad, India, with over 8 years of experience serving global industries.
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