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Lina Fasteners is a reputable manufacturer and supplier located in Tunis, Tunisia, specializing in high-quality Copper Nickel 70/30 Fasteners designed for challenging marine and corrosive environments. These fasteners are crafted to meet international standards, ensuring they offer outstanding resistance to seawater corrosion, biofouling, and stress corrosion cracking. With a focus on precision, Lina Fasteners produces bolts, nuts, studs, and washers that boast exact dimensions and consistent mechanical properties, thanks to advanced manufacturing techniques and rigorous quality control. Their products are widely used in marine engineering, shipbuilding, offshore platforms, desalination plants, and heat exchangers, providing reliable fastening solutions that promise longevity and dependable performance.
Copper Nickel 70/30 Fasteners are made up of about 70% copper and 30% nickel, with small amounts of iron and manganese added to boost strength and corrosion resistance. This alloy is known for its exceptional resistance to seawater, chloride-induced corrosion, and biofouling. These fasteners demonstrate impressive tensile strength, high toughness, and excellent ductility. They maintain their shape under load, perform well across a broad temperature range, and deliver reliable mechanical performance in harsh marine and coastal conditions.
| Grade | Cu | Mn | Pb | Ni | Fe | Zn |
|---|---|---|---|---|---|---|
| Copper Nickel | 65.0 min | 1 max | .05 max | 29-33 | 0.4-1.0 | 1 max |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength, ultimate | 372-517 MPa | 54000-75000 psi |
| Tensile strength, yield (depending on temper) | 88.0-483 MPa | 12800-70100 psi |
| Elongation at break (in 381 mm) | 45.0% | 45.0% |
| Charpy impact | 107 J | 78.9 ft-lb |
| Machinability (UNS C36000 (free-cutting brass) = 100%) | 20% | 20% |
| Shear modulus | 57.0 GPa | 8270 ksi |
| Poisson’s ratio | 0.34 | 0.34 |
| Elastic modulus | 150 GPa | 21800 ksi |
| Grade | Cupro Nickel |
| Specifications | ASTM / ASME SB 151, SB 152 |
| Standards | DIN, ASTM, BS and all International Standards |
| Length | UPTO 5 METERS |
| Size | M4 To M100 | Custom Sizes |
| Form | Nuts, Bolts, Washers, Screw |
| Types | Hex Bolts, Flange Bolts, Hex Head Bolts, Lag Bolts, Square Bolts, Eye Bolts, U Bolts, T Bolts, Counter sunk Bolts, Hex Head Nut, Eye Nut, Dome Nut, Coupling Nut, Square Nut, Acorn Nut, Hex Head Cap Screws, Socket Set Screws, Anchor Screws, Socket Head Screws, Concrete Screws, Shoulder Screws, Threaded Screws, Machine Screws, Machine Washers, Flat Washer, Star Washers, Sealing Washer, Lock Washer 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.
Copper Nickel 70/30 Fasteners find extensive use in marine and offshore settings where seawater corrosion resistance is essential. They are commonly utilized in shipbuilding, seawater piping systems, heat exchangers, condensers, and desalination plants. These fasteners are also heavily used on offshore platforms, coastal power stations, and various marine hardware assemblies. Additionally, they are suitable for applications in the oil and gas sector, chemical processing, and HVAC systems that deal with saline or corrosive fluids. Their durability, corrosion resistance, and reliability make them a top choice for demanding environments.
At Lina Fasteners are packaged in a way that retains the quality of Copper Nickel 70/30. The fasteners are also protected and packed separately in strong and moisture proof packs to avoid rusting and contamination. Proper labeling makes it easier to identify the product and also makes handling easier. Our accurate packaging ensures that the fasteners reach the customers in the right condition and are usable immediately, which is a testimony of our quality products and excellent customer relations.
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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