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The Fasteners Mart, headquartered in Mumbai, India, is a leading supplier of high-performance fasteners designed for critical and corrosive industrial environments. One of its premier offerings includes Super Duplex Steel Fasteners made from Grade S32750. These fasteners—available in shapes like bolts, nuts, washers, studs, and screws—are crafted from a high-alloy stainless steel known for its superior strength and corrosion resistance. Grade S32750 combines the benefits of austenitic and ferritic structures, offering excellent durability, making it an ideal choice for offshore, marine, and chemical processing applications.
Super Duplex Steel S32750 Fasteners are composed of approximately 24–26% chromium, 6–8% nickel, 3–5% molybdenum, with additions of nitrogen, manganese, and iron. They offer a high tensile strength of around 795 MPa and yield strength of 550 MPa, with excellent elongation (25%). These fasteners have a density of 7.8 g/cm³ and a melting point of about 1350°C. Their dual-phase microstructure provides high resistance to stress corrosion cracking, pitting, and crevice corrosion, making them extremely tough, reliable, and suitable for high-pressure and corrosive environments.
| Specification | IS, BS, ASTM, ASME |
| Grade | Super Duplex Steel | UNS S32750 | S32760 |
| Standard | ASTM A479 ASME SA479 |
| Length | 3mm to 200mm |
| Form | Screw, Nuts, Bolts, Washers |
| Size | 3/6″ to 2″, M3 – M56, Custom Sizes |
| Application | Oil & Gas, Heat exchanger and condenser, Automobile Industry, Engineering, Power plants, Refineries & Petrochemicals, Ship building, Desalination Plants |
| 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 S32750 Fasteners are extensively used in highly corrosive and high-stress environments. Industries such as offshore oil and gas, desalination plants, chemical processing, and marine engineering rely on these fasteners for their superior corrosion resistance and mechanical strength. They are ideal for use in heat exchangers, pressure vessels, piping systems, and structural components exposed to chlorides and aggressive media. Their durability and performance in both high-temperature and low-temperature conditions make them essential for critical applications requiring long-term reliability and reduced maintenance.
The Fasteners Mart provides fast and secure shipping of Super Duplex Steel S32750 Fasteners to both domestic and international locations. Every fastener is specially packaged in moisture-resistant, heavy-duty materials to protect them during transit. Special customized packaging and labeling facility is provided to suit specific customer needs and make handling trouble-free.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
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