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Located in the busy industrial heart of Kolkata, Rinku Fasteners is a trusted manufacturer and supplier of high-quality Duplex Steel Fasteners. Serving industries across India, the company blends technical expertise with a warm, customer-focused approach. Each fastener is crafted with precision to deliver exceptional strength, corrosion resistance, and long-term reliability, even in harsh and demanding environments. Rinku Fasteners places great value on customer relationships, listening carefully to project needs and providing dependable fastening solutions. Their Duplex Steel Fasteners reflect consistent craftsmanship, durability, and a sincere commitment to helping clients achieve safe, stable, and efficient operations.
Duplex Steel Fasteners are produced from a balanced austenitic–ferritic stainless steel alloy containing chromium, nickel, molybdenum, and nitrogen. This unique composition provides outstanding corrosion resistance, especially against chlorides, along with excellent mechanical strength. These fasteners exhibit high tensile and yield strength, impressive fatigue resistance, and dependable performance under high pressure and temperature variations. Their dual-phase microstructure ensures toughness, stability, and minimal distortion under heavy loads. This combination of strength, resilience, and corrosion resistance makes Duplex Steel Fasteners ideal for demanding industrial environments.
| 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 % |
| Grade | YS (MPa) | UTS (MPa) | % Elongation | Hardness(BHN) |
| UNS S32750 | 550 min. | 795 min. | 15 min. | 310 max. |
| UNS S32760 | 550 min. | 750 min. | 25 min. | 270 max. |
| Specifications | : | ASTM A182 / ASME SA182 |
| Size | : | 1/8″ NB TO 24″ NB |
| Standards | : | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Class / Pressure | : | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Standard | : | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Grades | : | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F6 |
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.
Duplex Steel Fasteners are widely used in industries that require strong, corrosion-resistant connections capable of performing in harsh environments. They are commonly applied in offshore platforms, marine systems, desalination plants, and chemical processing equipment due to their resistance to chlorides and aggressive chemicals. Their high strength makes them suitable for pressure vessels, pumps, valves, and heat exchangers. These fasteners are also valued in the oil and gas sector, pulp and paper mills, and structural applications exposed to high stress or fluctuating temperatures. Engineers choose Duplex Steel Fasteners for their long-term durability, stability, and ability to maintain secure connections in demanding conditions.
At Rinku Fasteners, we prioritize the safe packaging of Duplex Steel Fasteners to maintain their quality and prevent damage. Each binder is thoroughly inspected and wrapped in protective packaging to ensure it arrives in the best possible condition. We offer a range of packaging options, including drop boxes and containers in sizes to suit your needs. Our durable packaging solutions protect your fasteners during transit and storage, assuring they are ready for immediate use in your most demanding applications.
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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