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Punit Fasteners, located in Delhi, India, stands out as a top manufacturer and supplier of high-quality industrial fasteners, including their impressive Super Duplex Steel Washers. These washers are designed to offer exceptional strength, durability, and resistance to harsh corrosive environments. Thanks to advanced manufacturing techniques and a commitment to international standards, Punit Fasteners provides fasteners that meet the rigorous demands of industries like oil & gas, marine, chemical, and desalination. Renowned for their reliability and quality, Punit Fasteners ensures that their Super Duplex Steel Washers deliver long-lasting performance, even in the toughest conditions, making them a trusted choice for global industrial needs.
Super Duplex Steel Washers are primarily crafted from grades such as UNS S32750 or S32760. These steels boast a unique dual-phase microstructure, consisting of about 50% austenite and 50% ferrite, along with high levels of chromium (24–26%), nickel (6–8%), molybdenum (3–5%), and nitrogen. This blend provides the washers with outstanding corrosion resistance, especially against pitting, crevice corrosion, and chloride stress corrosion cracking. Their mechanical properties include impressive tensile strength (up to 800 MPa), excellent fatigue resistance, and good toughness across a range of temperatures. Their durability and resistance to corrosion make them perfect for extreme mechanical and environmental challenges.
| 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 Washers find extensive use in industries that face high pressure and corrosive conditions. In the oil & gas sector, they are essential for subsea pipelines, flanges, and pressure vessels. In marine applications, they play a crucial role in shipbuilding and offshore platforms, where resistance to saltwater corrosion is vital. Additionally, in chemical processing and desalination plants, these washers are indispensable for ensuring reliability and safety 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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