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Lina Fasteners is a trusted manufacturer and supplier located in Tunis, Tunisia, known for providing top-notch fastening solutions tailored for tough industrial settings. The company focuses on ASTM A182 F55 Fasteners, crafted from advanced super duplex stainless steel to ensure remarkable strength and resistance to corrosion. With state-of-the-art production facilities, a skilled team, and strict quality control measures, Lina Fasteners guarantees adherence to international standards. Catering to sectors like oil and gas, petrochemical, marine, power generation, and chemical processing, the company delivers precision-engineered fasteners for critical applications. Lina Fasteners is dedicated to maintaining consistent quality, competitive pricing, customized solutions, and timely delivery to meet the complex demands of projects in both regional and global markets.
ASTM A182 F55 Fasteners are made from super duplex stainless steel, featuring a well-balanced austenitic-ferritic microstructure. This alloy typically includes around 24–26% chromium, 6–8% nickel, and 3–4% molybdenum, along with copper and nitrogen, providing excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. These fasteners boast high yield and tensile strength, outstanding fatigue resistance, and good impact toughness. They maintain their mechanical stability even under high pressure and moderate temperatures, ensuring exceptional load-bearing capacity, dimensional stability, and long-lasting durability in harsh, chloride-rich, offshore environments.
| 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 applications where critical applications require high-performance materials. These binders are used in offshore oil and gas platforms, chemical plants, desalination plants and marine environments, due to their superior corrosion resistance, especially against chloride-induced stress corrosion cracking (SCC). It also comes in high pressure and high temperature applications where reliability and durability are paramount. Their manufacturing capabilities extend to building materials, valves, pumps and a variety of equipment where strength, flexibility and corrosion resistance are required.
ASTM A182 F55 Fasteners find extensive use in challenging applications that demand exceptional strength and corrosion resistance. They are commonly utilized in offshore oil and gas platforms, subsea equipment, pipelines, and valves. Their applications span across petrochemical plants, chemical processing units, heat exchangers, and pressure vessels, where reliability is crucial. These fasteners are designed to withstand the rigors of demanding environments, making them a preferred choice for engineers and manufacturers looking for durable solutions in critical infrastructure projects.
Lina Fasteners is a leading manufacturer and supplier of high-quality fasteners in Tunis, Tunisia, with over 8 years of experience serving global industries.
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