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Rinku Fasteners, located in the prominent engineering hub of Kolkata, India, is a reliable manufacturer and supplier of high-performance ASTM A182 F55 Fasteners. These fasteners are crafted to deliver exceptional strength, corrosion resistance, and durability in some of the most demanding industrial environments. ASTM A182 F55, a Super Duplex stainless steel grade, is known for its ability to withstand extreme pressures, aggressive chemicals, and seawater exposure. With advanced production technologies and rigorous quality controls, Rinku Fasteners ensures every fastener meets global standards, offering long-lasting, dependable performance for critical applications.
ASTM A182 F55 Fasteners are made from a Super Duplex stainless steel alloy enriched with chromium, molybdenum, nickel, and nitrogen. This composition provides outstanding resistance to pitting, crevice corrosion, and stress-corrosion cracking. Mechanically, these fasteners exhibit exceptionally high tensile and yield strength, making them far stronger than traditional stainless steel grades. They also maintain excellent toughness, hardness, and fatigue resistance even in harsh, high-pressure, or high-temperature environments. The balanced dual-phase microstructure ensures both strength and corrosion protection, making F55 fasteners ideal for the most demanding industrial conditions.
| Element | Content (%) |
|---|---|
| Chromium, Cr | 24 – 26 |
| Nickel, Ni | 4.5 – 6.5 |
| Phosphorous, P | 0.035 Max |
| Carbon, C | 0.03 max |
| Sulfur, S | 0.015 Max |
| Molybdenum, Mo | 3 – 4 |
| Manganese, Mn | 1.2 Max |
| Silicon, Si | 0.8 Max |
| Copper, Cu | Balance |
| Nitrogen, N | 0.25 |
| Iron, Fe | Balance |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) | Hardness Rockwell C (HR C) |
|---|---|---|---|---|
| Alloy GR F55 | 110 | 80 | 15 | 28 max |
| Grade | ASTM A182 GR.F55 |
| Specifications | ASTM A 182 / ASME SA 182 |
| Dimension | DIN, ASTM, BS and all International Standards |
| Length | 3mm to 200mm |
| Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Types | Bolts, Nuts, Washers, Anchor Fasteners, Stud Bolts, Eye Bolt, Stud, Threaded Rod, Cotter Pin, Socket Screw, Fine Fasteners & Spares, Foundation Fasteners, Hexagon Castle Nuts, Hexagon Domed Cap Bolts, Hexagon Thin Nuts etc |
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.
ASTM A182 F55 Fasteners are widely used in environments where both mechanical strength and corrosion resistance are essential. They are ideal for offshore platforms, subsea equipment, desalination plants, and marine structures due to their excellent seawater resistance. In the chemical, petrochemical, and oil & gas industries, these fasteners are used in pumps, valves, heat exchangers, reactors, and pressure vessels. Their durability under high stress makes them suitable for power generation, mining operations, and heavy structural engineering. Wherever extreme conditions demand secure and long-lasting fastening solutions, ASTM A182 F55 Fasteners offer exceptional performance and reliability.
Our ASTM A182 F55 Fasteners are carefully packed to ensure they remain undamaged during transit. For international shipments, we use robust wooden boxes or cases conforming to global packaging standards. Each fastener bears our trademarked company logo, indicating its Grade, Size, and Lot No. Upon request, we can customize product markings to meet specific customer needs. Additionally, we provide Manufacturer Test Certificates compliant with standards like EN 10204-3.1, EN 10204-3.2, along with Raw Materials Certificates, NABL approved Lab Test Reports, 100% Radiography Test Reports, and Third-Party Inspection Reports, ensuring quality and compliance throughout.
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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