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Punit Fasteners is a reliable manufacturer and supplier of Copper Nickel 70/30 Fasteners in Delhi, India. We focus on providing high-quality fasteners made from Cu-Ni 70/30 alloy, known for its strong resistance to seawater corrosion and high mechanical strength. Our products include bolts, nuts, washers, screws, and custom fasteners designed for the marine, oil and gas, and chemical industries. Built to survive harsh conditions, our fasteners meet global standards such as ASTM and ASME. At Punit Fasteners, we ensure precision, durability, and timely delivery to meet the demands of clients in crucial applications.
Copper Nickel 70/30 Fasteners contain 70% copper and 30% nickel, with small amounts of iron and manganese to improve strength and corrosion resistance. These fasteners have a tensile strength of 340–500 MPa and yield strength of 105–220 MPa. Their Brinell hardness ranges from 80 to 100. They resist biofouling, stress corrosion cracking, and pitting, especially in saltwater. With a melting point of about 1170°C and good thermal stability, Copper Nickel 70/30 fasteners are perfect for long-lasting performance in challenging marine and industrial settings.
| 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 are commonly used in shipbuilding, offshore platforms, and marine piping systems due to their strong resistance to seawater corrosion. They work well in condenser systems, desalination units, and heat exchangers, where exposure to chlorides and high temperatures occurs. In the chemical industry, these fasteners secure equipment that faces acidic and saline solutions. Power plants utilize them in cooling systems and condensers. Their resistance to biofouling also makes them suitable for underwater hardware and pump components. These fasteners are favored where mechanical strength, corrosion protection, and long-lasting durability are needed in harsh environments.
At Punit 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.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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