Copper Nickel Fasteners Manufacturer in India
Copper Nickel Fasteners are also known as cupronickel fasteners which are engineering parts produced through an alloy consisting of copper and nickel with regulated additions of reinforcing components. Unifit Fastener is a reputable producer and distributor of the quality copper nickel alloy fasteners in various grades and forms. The two common alloys in such alloys are Cu-Ni 70/30 and Cu-Ni 90/10 each with the aim of providing superior mechanical strength and corrosion resistance.
Copper Nickel 70/30 fasteners are made of about 70 percent copper and 30 percent nickel and have better resistance to erosion and bio-fouling in the marine environment. Copper Nickel 90/10 brass fasteners are composed of approximately 90 percent copper and 10 percent nickel and these metals improve the resistance to acidic and brackish conditions. As a result of such properties, cupronickel fasteners are commonly employed in seawater hardware, desalination facilities, heat exchange, ship construction, offshore facility, chemical processing plant, and condensers.
Unifit Fastener distributes copper nickel bolts, nuts, washers, threaded rods, studs, screws, and socket fasteners of all sizes (M4 to M100) and lengths (to 5 meters). These are fasteners that can be manufactured by hot forging or cold forging as per the need. They are also very thermal stable, ductile and perform efficiently even in high-pressure situations.
Cu-Ni threaded rods are specifically used in applications that need continuous threading to join components using nuts whereas heavy hex nuts and hex bolts are more popular in high-temperature and high-strength applications. They are resistant to seawater corrosion and this uncommon virtue makes them applicable in marine and offshore structures.
Unifit Fastener provides unique solutions and attractive rates to suit various requirements in the industry in case of high-performance and properly designed copper nickel fasteners.
Request QuoteTable of Contents
- What is copper nickel fasteners?
- Copper Nickel Fasteners – Technical Specification
- Types Of Cupro Nickel Fasteners
- Send Your Enquiry
- Equivalent Grades of Copper Nickel Bolts
- Chemical Composition Copper Nickel Fasteners
- Mechanical Properties of Cu-Ni Fasteners
- Physical Properties of Copper Nickel Threaded Rod
- Applications of Copper Nickel Fasteners
- FAQs About Copper Nickel Fasteners
What is copper nickel fasteners?
Copper Nickel (Cu-Ni) fasteners are strong, corrosion-resistant fasteners, especially effective in marine environments, made from copper-nickel alloys (like 70/30 or 90/10), offering excellent seawater resistance, high strength, and durability, used in offshore platforms, piping, and hydraulic systems, though more costly and less machinable than stainless steel. They provide good performance in wet/corrosive conditions, with temperature limits around 150°C in wet environments.
Grades of Cupro-Nickel Fasteners
Copper Nickel Fasteners – Technical Specification
| Parameter | Details |
|---|---|
| Material | Copper Nickel Alloy (Cu-Ni) |
| Specifications | ASTM |
| Product Standards | ASTM B151 |
| Available Sizes | M10 to M100 |
| Grades | Cu-Ni 90/10 (UNS C70600), Cu-Ni 70/30 (UNS C71500) |
| Equivalent Standards | ASTM / ASME SB151, SB152 |
| Size Range | M10 to M100 |
| Length | Up to 5 meters |
| Surface Coating Options | Hot Dip Galvanized, Phosphated, Teflon Coated, PTFE Coated, Xylon Coated, Zinc Plated, Cadmium Plated |
Types Of Cupro Nickel Fasteners
Cupro Nickel Threaded Rod
Cupro Nickel Nuts
Cupro Nickel Heavy Hex Bolts
Cupro Nickel Anchor Bolts
CuNi Stud Bolt
Cu-Ni Screw
Cu-Ni Bolts
Copper Nickel Washers
Copper Nickel Hex Nuts
Send Your Enquiry
Equivalent Grades of Copper Nickel Bolts
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| Specifications | 2.0872 | C70600 |
| Size | 2.0882 | C71500 |
Chemical Composition Copper Nickel Fasteners
| Grade | Cu | Mn | Pb | Ni | Fe | Zn |
|---|---|---|---|---|---|---|
| Cu-Ni 70/30 | 65.0 min | 1 max | 0.05 max | 29–33 | 0.4–1.0 | 1 max |
| Cu-Ni 90/10 | 88.6 min | 1.0 max | 0.05 max | 9–11 | 1.8 max | 1 max |
Mechanical Properties of Cu-Ni Fasteners
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|---|---|
| Copper Nickel 70/30 | 0.323 lb/in³ at 68°F | 2260°F | 50,000 psi | 20,000 psi | 30% |
| Copper Nickel 90/10 | 0.323 lb/in³ at 68°F | 2260°F | 50,000 psi | 20,000 psi | 30% |
Physical Properties of Copper Nickel Threaded Rod
| Property | Min (SI) | Max (SI) | Units (SI) | Min (Imp.) | Max (Imp.) | Units (Imp.) |
|---|---|---|---|---|---|---|
| Density | 8.5 | 8.95 | Mg/m³ | 530.64 | 558.73 | lb/ft³ |
| Tensile Strength | 267 | 624 | MPa | 38.73 | 90.50 | ksi |
| Young’s Modulus | 120 | 156 | GPa | 17.40 | 22.63 | 10⁶ psi |
| Shear Modulus | 45 | 58 | GPa | 6.53 | 8.41 | 10⁶ psi |
| Thermal Conductivity | 19 | 66 | W/m.K | 35.57 | 123.55 | BTU.ft/h.ft².F |
| Specific Heat | 384 | 386 | J/kg.K | 0.297 | 0.299 | BTU/lb.F |
| Melting Point | 1384 | 1508 | K | 2031.53 | 2254.73 | °F |
Environmental Resistance of Cupro Nickel Round Head Bolts
| Exposure Condition | Rating (1 = Poor, 5 = Excellent) |
|---|---|
| Flammability | 5 |
| Fresh Water | 5 |
| Sea Water | 5 |
| Organic Solvents | 5 |
| UV Resistance | 5 |
| Wear | 5 |
| Weak Alkalis | 5 |
| Weak Acids | 4 |
| Oxidation at 500°C | 3 |
| Strong Alkalis | 5 |
| Strong Acids | 2 |
Product Inventory of Copper Nickel Alloy Fasteners
| Hexagon Bolts / Set Screws | Stud Bolts | Hexagon Nuts | Socket Cap Screws |
|---|---|---|---|
| DIN 931 | BS 4882 | DIN 934 | DIN 912 |
| DIN 933 | DIN 976 | BS 1768 | DIN 6912 |
| BS 1768 | BS 1769 | DIN 7984 | |
| UNI 5731 | BS 1083 | ANSI B18.3 | |
| UNI 5739 | BS 3692 | ISO 4762 | |
| ISO 4014 | ISO 4032 | UNI 5931 | |
| ISO 4017 | ISO 4033 | BS 2470 | |
| BS 1769 | ANSI B18.2.2 | BS 4168 | |
| BS 3692 | |||
| ANSI B18.2.1 |
Socket, Countersunk Screws, Studs & Washers Standards
| Socket & Slotted Set Screws | Countersunk Screws | Studs | Washers |
|---|---|---|---|
| DIN 913 | DIN 963 | DIN 938 | DIN 125 |
| DIN 914 | DIN 7991 | DIN 939 | DIN 9021 |
| DIN 915 | BS 4168 | DIN 2510 | BS 4320 |
| DIN 916 | BS 1981 | BS 4439 | BS 3410 |
| DIN 551 | BS 483 | BS 2693 | Spring Washers DIN 127 |
| DIN 553 | BS 2470 | BS 4464 | |
| DIN 438 | BS 1802 |
Copper Nickel Fasteners Price Range
| Product | Price (USD per Piece) |
|---|---|
| Cupro Nickel Bolts & Nuts | $0.5 – $4500 |
| Copper Nickel Fasteners | $0.5 – $10 |
| Copper Nickel Chipboard Screws | $0.001 – $2 |
| General Cu-Ni Alloy Fasteners | $0.1 – $100 |
Applications of Copper Nickel Fasteners
- Marine and Shipbuilding Industry
- Offshore Oil and Gas Platforms
- Desalination and Seawater Treatment Plants
- Heat Exchangers and Condensers
- Power Generation Plants
- Chemical and Petrochemical Processing
- Firefighting and Sprinkler Systems
- HVAC and Chilled Water Systems
- Instrumentation and Control Systems
- Marine and Coastal Infrastructure
FAQs About Copper Nickel Fasteners
What is cupro nickel used for?
Cupro nickel is widely used in marine and seawater applications due to its excellent resistance to corrosion and biofouling. Common uses include shipbuilding, heat exchangers, condensers, desalination plants, offshore equipment, and seawater piping systems. It is also used in coinage, automotive brake systems, and high-temperature industrial fasteners.
What is the difference between copper and copper-nickel?
Copper is a pure metal known for its high electrical and thermal conductivity. Copper-nickel is an alloy of copper and nickel that offers higher strength and significantly improved resistance to seawater corrosion and erosion. Copper is mainly used in electrical and thermal applications, while copper-nickel is preferred for marine and industrial environments.
What are common grades of copper-nickel?
The most commonly used copper-nickel grades are Cu-Ni 90/10 (C70600) and Cu-Ni 70/30 (C71500). These grades differ primarily in their copper-to-nickel ratio, which influences strength, corrosion resistance, and suitability for various marine conditions.
Can copper-nickel be welded?
Yes, copper-nickel alloys are readily weldable using conventional welding methods. Proper joint preparation, cleanliness, and the correct filler material are essential to maintain mechanical strength and corrosion resistance.