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Punit Fasteners is a prominent manufacturer and supplier of Copper Nickel Bolts based in Delhi, India. We provide high-grade Cu-Ni bolts, including 90/10 and 70/30 types, designed for applications that require corrosion resistance and structural reliability. Our Copper Nickel Bolts come in various sizes, thread types, and head styles and comply with ASTM and international standards. Designed for the marine, chemical, and power generation industries, these bolts are precision-machined for strength and durability. With in-house testing and quality checks, Punit Fasteners ensures reliable performance under extreme conditions, delivering dependable fastening solutions that meet your needs.
Copper Nickel Bolts are made from copper-nickel alloys, typically 70% copper and 30% nickel (70/30), or 90/10 grades. They contain trace elements such as iron and manganese to enhance their corrosion and mechanical properties. These bolts have a tensile strength between 350–500 MPa and yield strength of about 105–220 MPa. Their Brinell hardness is around 80–100, with strong fatigue and wear resistance. They perform well in high-temperature and high-pressure settings and resist seawater, chlorides, and biofouling. Their consistent thermal and electrical properties further boost their performance in tough marine and industrial situations.
| 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 Bolts are widely used in offshore oil rigs, marine vessels, and coastal infrastructure due to their resistance to saltwater corrosion and biofouling. In desalination plants and heat exchangers, they secure piping and flanged joints exposed to brine and acidic solutions. These bolts are also ideal for power plants, HVAC systems, and chemical processing equipment that require strong, corrosion-resistant fastening. Their thermal conductivity and non-magnetic features make them suitable for electronic and instrumentation applications. Copper Nickel Bolts offer long service life and structural reliability in corrosive and temperature-sensitive environments across various industries.
At Punit Fasteners, we make sure that our Copper Nickel bolts are packed in a way that will not affect their quality and effectiveness. Every bolt is packed in individual protection to avoid damage, rusting or any form of contamination in the course of transportation. Our packaging is safe and secure using robust cartons and we also have the ability to provide customized packaging. Proper labeling and packing also help in easy identification and handling of the products as part of our core values of offering quality products in good condition.
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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