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Ramu Fasteners is a reputable manufacturer and supplier of top-notch Super Duplex Steel Nuts, proudly based in Hyderabad, India. The company focuses on crafting high-strength fasteners that are built to withstand extreme and highly corrosive environments. Using cutting-edge technology and high-quality raw materials, Ramu Fasteners’ Super Duplex Steel Nuts deliver remarkable durability, precision, and a long lifespan. With a strong dedication to quality and adherence to international standards, they serve critical industries like oil & gas, offshore, marine, and chemical processing, both domestically and globally.
These Super Duplex Steel Nuts are made from grades like UNS S32750 and S32760, showcasing a unique dual-phase microstructure of austenite and ferrite. Their composition includes a high percentage of chromium (around 25%), nickel (7%), molybdenum (3.5–4%), and nitrogen, which together provide exceptional corrosion resistance. These nuts are known for their impressive tensile and yield strength, excellent fatigue resistance, and outstanding protection against pitting, crevice corrosion, and stress corrosion cracking. They also perform reliably under high pressure and elevated temperature conditions.
| 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 a go-to choice in tough, corrosive environments where regular stainless steels just can’t cut it. You’ll find them being put to good use in offshore platforms, subsea systems, and oil & gas pipelines. In the realms of marine engineering and shipbuilding, these nuts shine with their impressive resistance to seawater corrosion. They’re also a staple in chemical processing plants, desalination facilities, heat exchangers, and pressure vessels. Plus, Super Duplex Steel Nuts are perfect for power generation, pulp and paper industries, and heavy engineering projects that demand outstanding strength and corrosion resistance.
At Ramu 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.
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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