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Rinku Fasteners, situated in Kolkata, India, is a distinguished manufacturer and supplier of Super Duplex Steel S32750 bolts. The company is recognized for producing high-strength, corrosion-resistant bolts designed to endure extreme environments. Their Super Duplex S32750 bolts provide exceptional mechanical strength combined with outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking, making them ideal for critical industrial applications where durability and reliability are essential.
Super Duplex Steel S32750, also known as UNS S32750 or ASTM F53, is composed of 24-26% chromium, 6-8% nickel, 3-5% molybdenum, with nitrogen content between 0.24-0.32% and balanced with iron. This dual-phase alloy (austenite and ferrite) offers a yield strength typically around 620 to 720 MPa, tensile strength ranging from 800 to 1000 MPa, and excellent toughness even at sub-zero temperatures. It has a density of approximately 7.8 g/cm³ with superior resistance to aggressive chloride environments.
| 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 S32750 bolts are extensively used in sectors such as oil and gas, marine engineering, chemical processing, desalination plants, and power generation. Their exceptional corrosion resistance makes them perfect for applications involving seawater exposure, high temperature, and highly corrosive media. These bolts are commonly found in pipelines, pressure vessels, heat exchangers, and structural components where safety and longevity are critical.
At Rinku Fasteners, our Super Duplex Steel Bolts S32750 are carefully installed to ensure safety and optimal quality. Each bolt is individually inspected and wrapped in corrosion resistant packaging, then placed in sturdy, carefully labeled boxes. Boxes are clearly marked with item details and sizes for easy handling and storage. We prioritize safe and efficient deliveries, so our packaging also includes shock absorbers to prevent damage during transit, and to ensure your fasteners arrive in edible condition deaf
Rinku Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kolkata, India, with over 8 years of experience serving global industries.
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