
Fasteners are essential to any engineering or construction project, as they hold different components together. The type of fasteners used often depends on the project requirements. One highly sought-after fastener is cupro nickel, known for its excellent resistance to corrosion and impressive durability.
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Cupro-nickel is an alloy composed of copper, nickel, and a small amount of iron, manganese, and other materials. This alloy comes in various grades depending on its nickel and copper content. Common Cupro-Nickel Fasteners include C70600 or 90/10 cupro-nickel and C71500 or 70/30 cupro-nickel. The former has a higher copper content, making it more corrosion-resistant but less durable, while the latter has a higher nickel content, giving it higher strength and toughness.
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Cupro nickel fasteners have extensive applications in marine environments due to their excellent resistance to saltwater corrosion. This feature makes them ideal for oil and gas pipelines, underwater cables, mooring chains, and shipbuilding. This alloy is also popular in power plants, desalination plants, and industrial equipment exposed to brine or acidic corrosion. Cupro nickel fasteners are also suitable for air conditioning and refrigeration systems, as they do not spark or ignite. They are also used in the automotive industry, especially in brake systems requiring friction, wear, and corrosion resistance.
Thanks to their unique properties, cupro-nickel fasteners present various uses in different industries. They join and secure metal plates, pipes and tubes, and other mechanical components. They are also used in pumps, valves, and heat exchangers since they resist fouling due to their non-biofouling properties. Cupro nickel fasteners are also used in marine propellers due to their exceptional resistance to marine organisms, which increases their lifespan and minimizes maintenance costs.



One of the primary advantages of cupro-nickel fasteners is their corrosion resistance - the copper and nickel composition provides excellent protection against corrosion and biofouling. Additionally, cupro-nickel fasteners have remarkable ductility, malleability, and toughness, making them easy to work with and capable of withstanding heavy loads.
Cupro nickel fasteners are a valuable component due to their unique properties, including excellent resistance to corrosion, durability, and resistance to biofouling. Their ductility, malleability, and toughness make them easy to work with and ideal for various applications like marine environments, refrigeration systems, and power plants.
Cupro Nickel Bolts and Nuts Specification
Standard | ASTM B151 / ASME SB151 |
Bolt / Screw Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
Nuts Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
Washers Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
Machine Screws Size | M1.6 – M12 |
Self Tapping Screw Size | No.2 – No. 14 |
Length | 3 mm to 200 mm |
Threads | UNF, BSW, BSF, METRIC, UNC, or as required |
Fasteners |
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Form | Hex, Threading, Square, Round as per Gauge Etc. |
Raw materials Source | JSPL, Mukund Steel, Tata Steel, Dhamm Steel, Usha Martin,etc. |
Threads Configuration | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
Certification | Dual Certified As per ASTM & ASME Codes |
Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
Threads | Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or vertically |
Test Certificate | as per EN 10204 / 3.1 Manufacturer Test Certificate |
Additional Certifications | PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified |
Production Process | M24-M100: hot forging , M2-M24: Cold Froging, for custom-made connecting element machining and CNC |
Types | Bolts, Nuts, Stud Bolts, Washers, Threaded Rod, Anchor Fasteners, Eye Bolt, Stud, Cotter Pin, Socket Screw, Fine Fasteners & Spares, Foundation Fasteners, Hexagon Castle Nuts, Hexagon Domed Cap Bolts, Hexagon Thin Nuts etc. |
Cupro Nickel Fasteners Price List
Price List of Cupro Nickel Fasteners | Cu Ni Fasteners Price in India (INR) | Copper Nickel Fasteners Price in USD | Cupro Nickel Fasteners Price in UAE (Dirham) |
---|---|---|---|
Cu Ni Nut Bolt Price Per Kg | ₹ 1,777 | $ 25.00 USD | 67.10 AED |
CuNi Screws Price | ₹ 2,335 | $ 27.72 USD | 96.45 AED |
M16 5/8inch Copper Nickel Hex Head Bolt Price List | ₹ 2,544 | $ 25.21 USD | 167.27 AED |
Cu-Ni Nut Bolt Price List | ₹ 1,477 | $ 37.35 USD | 89.73 AED |
Price of Cupro Nickel Stud Bolt | ₹ 3,547 | $ 36.40 USD | 154.71 AED |
M8 Cu Ni Hex Flange Nut Price | ₹ 1,648 | $ 13.19 USD | 46.76 AED |
Copper Nickel Hex Bolt Price List | ₹ 6,347 | $ 194.32 USD | 475.50 AED |
Cupro Nickel Fasteners Price List | ₹ 2,536 | $ 68.33 USD | 156.17 AED |
Copper Nickel Bolts Price List | ₹ 1,229 | $ 37.45 USD | 58.27 AED |
Copper Nickel Fasteners Technical Data Sheet
Cupro Nickel Manufacturing Process




Common Types Of Cupro Nickel Fasteners

Cupro Nickel Bolts

Cupro Nickel Nuts

Cu Ni Steel Screw

Copper Nickel Washer

CuNi Stud Bolts

Cupro Nickel Anchor Bolts
Other Type Cu-Ni Fasteners
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