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Punit Fasteners has established itself as a reliable manufacturer and supplier of high-quality fasteners right from the heart of Delhi, India. With a focus on high-performance materials, they provide top-notch Super Duplex Steel Nuts designed for tough, corrosive, and high-pressure settings. These nuts are crafted with precision to ensure outstanding strength, corrosion resistance, and long-lasting reliability, making them perfect for critical industrial uses. Thanks to their state-of-the-art production facilities and strict quality control, Punit Fasteners guarantees that every product meets international standards. They cater to various industries, including oil & gas, petrochemical, marine, and desalination, building a solid reputation for delivering durable and efficient fastening solutions both in India and around the world.
Super Duplex Steel Nuts are generally crafted from grades like UNS S32750 or S32760, which boast high levels of chromium (24–26%), nickel (6–8%), molybdenum (3–5%), and nitrogen. This unique dual-phase microstructure, consisting of austenite and ferrite, provides an exceptional blend of strength and corrosion resistance. These nuts are highly resistant to pitting, crevice corrosion, and stress corrosion cracking. Their mechanical properties include impressive tensile strength (up to 800 MPa), high yield strength, and remarkable fatigue resistance. Their metallurgical stability makes them ideal for high-pressure, high-temperature, and chemically aggressive environments, especially in offshore and subsea applications.
| 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 used in many critical applications. In chemical processing they are able to handle the effects of aggressive chemicals and high pressures. In marine applications, they are immune to the effects of sea water thus providing long service life. In the oil and gas industry, they offer secure fastening where high stress is exerted. Also, Super Duplex Steel nuts are applied in power generation and construction sectors due to their high performance in harsh conditions.
Super Duplex Steel Nuts find extensive use in situations that demand extreme mechanical strength and corrosion resistance, particularly in chloride-rich and acidic environments. In the oil & gas and petrochemical sectors, they are crucial for offshore drilling rigs, pipelines, and refineries. In the marine and subsea industries, these nuts are essential for ensuring the integrity and safety of various applications, from shipbuilding to underwater installations. Their ability to withstand harsh conditions makes them a go-to choice for engineers and manufacturers looking for reliable fastening solutions in challenging environments.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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