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Lina Fasteners, located in Tunis, Tunisia, stands out as a top manufacturer and supplier of high-performance **Super Duplex Steel Bolts** designed for tough industrial settings. Thanks to cutting-edge production technology, precise machining, and rigorous quality control, the company delivers bolts renowned for their exceptional strength, resistance to corrosion, and long-lasting durability. Catering to industries like offshore, marine, petrochemical, desalination, and heavy engineering, Lina Fasteners guarantees that every product adheres to international standards. Their dedication to innovation, reliability, and prompt delivery makes them a go-to partner for sectors that need robust fastening solutions capable of enduring extreme pressures, temperatures, and corrosive environments.
Super Duplex Steel Bolts are generally crafted from high-alloy grades like UNS S32750 or S32760, showcasing a well-balanced austenitic-ferritic microstructure. Their makeup includes high levels of chromium, molybdenum, and nitrogen, which provide outstanding resistance to pitting, crevice, and stress corrosion. These bolts demonstrate remarkable tensile and yield strength, excellent fatigue resistance, and stability even under extreme temperatures and pressures. The dual-phase structure boosts both hardness and toughness, making them ideal for highly corrosive and high-stress environments where top-notch mechanical performance and long-term reliability are crucial.
| 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 find extensive use in industries that require exceptional strength and corrosion resistance. In the oil and gas industry, they are vital for offshore platforms, subsea equipment, and pipeline systems that face chloride-rich conditions. The marine and shipbuilding sectors depend on them for reliable performance in saltwater environments. Chemical and petrochemical facilities utilize these bolts in reactors, heat exchangers, and process equipment that are subjected to aggressive chemicals.
At Lina Fasteners, we take utmost care in packing the Super Duplex Steel bolts for our customers. Every bolt is covered with protective materials to avoid any form of damage, corrosion, or contamination during transportation. We utilize sturdy cartons and provide packaging services that meet your requirements. Clear labeling and packing also help in making identification and handling easier, which is a testimony of our quality products in perfect condition.
Lina Fasteners is a leading manufacturer and supplier of high-quality fasteners in Tunis, Tunisia, with over 8 years of experience serving global industries.
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