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Punit Fasteners is a top manufacturer and supplier of Copper Nickel 70/30 Nuts in Delhi, India. These nuts are made from a high-quality Cu-Ni alloy that contains 70% copper and 30% nickel. They are designed to provide excellent resistance to corrosion, especially in marine and saltwater settings. Our Copper Nickel 70/30 Nuts meet international standards like ASTM B151 and B122, ensuring they are durable and strong. Available in hex, heavy hex, and custom forms, these nuts work well in seawater piping, heat exchangers, and offshore platforms. Punit Fasteners guarantees precise machining, accurate dimensions, and resistance to corrosion in each product we deliver.
Copper Nickel 70/30 Nuts consist of 70% copper and 30% nickel, with small amounts of iron and manganese added for improved strength and resistance. They have a tensile strength of 340–500 MPa and a yield strength of 105–220 MPa. The Brinell hardness ranges from 80 to 100, making them suitable for heavy-load applications. These nuts resist stress corrosion cracking, pitting, and crevice corrosion, especially in seawater and brine systems. Their strong resistance to biofouling, thermal stability, and non-magnetic properties make them perfect for marine, chemical, and power generation equipment fastening.
| Copper Nickel | Ni | Pb | Cu | Fe | Mn | Zn |
| 9-11 max | 0.05 max | 88.6 min | 1.8 max | 1.0 max | 1 max |
| Density | Elongation | Yield Strength (0.2%Offset) | Melting Point | Tensile Strength |
| 8.1 g/cm3 | 30 % | Psi – 35,000, MPa – 241 | 1443 °C (2430 °F) | Psi -80,000, MPa -551 |
|
Material |
Specification |
Standards |
Size |
|
Cupro Nickel
|
ASTM
|
ASTM B151, B152 |
M10 to M100
|
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 Nuts are widely used in shipbuilding, desalination plants, and offshore drilling platforms, where they are constantly exposed to saline environments. They are great for securing pipelines, flanges, and valves in seawater-cooled heat exchangers, condensers, and cooling systems. The power and petrochemical industries use them for their resistance to corrosion in acidic and brine-containing systems. These nuts are also found in firewater systems and marine pumps, providing long-lasting durability in submerged conditions. Their non-magnetic and non-sparking properties make them suitable for sensitive electronics and hazardous locations that require stable, corrosion-resistant fastening.
Our Copper Nickel 70/30 Nuts at Punit Fasteners are packed in a manner that they reach the clients in the best condition possible. Every nut is covered and placed in hard-wearing, moisture-proof packets to avoid spoilage and harm. Proper labeling enhances identification and management of the items. The nuts are packed carefully to ensure that they retain their high quality and are ready for consumption, thus showcasing our company’s dedication to providing high-quality products and excellent customer care.
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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