GNEE is one of the notable Manufacturers, Suppliers & exporters of Copper Nickel 70/30 Tube. In a variety of materials like Copper, Aluminium, Copper Nickel, Brass, Arsenic Brass. These are available in a variety of specifications, sizes, grades, and dimensions to serve the needs of a large range of industries.
Our products can be applied to an array of applications like Air Conditioning and Refrigerator Systems, Electrical Systems, Heat Exchangers, Condensers And Automobiles, Constructions, Water & Gas, Electrical Engineering, Marine Engineering, Earthing Systems, Heating Applications, Solar Panels, etc.
Copper Nickel 70/30 Tube
Copper-Nickel, famously known as Cupronickel is an alloy that contains 60-90 % of copper. It is highly resistant to saltwater corrosion and thus Cupro Nickel 70/30 tubes are used in heat exchangers, condensers, and cryogenic applications due to good ductility retention and corrosion-resistant properties. Other benefits of Copper Nickel 70/30 Seamless Pipe include sustaining high mechanical stress in high temperatures and finding application in oil refinery and cement industries.
Features of Copper Nickel 70/30 Tube
Copper-nickel alloys are of two types that include 70/30 and 90/10. Copper-Nickel 70/30 is highly resistant to seawater corrosion due to the presence of significant amounts of manganese and iron.
Cupronickel is a metal that is utilized in cryogenic applications. When used in cryogenic processing and storage equipment, its combination of high ductility retention and thermal conductivity at very low temperatures makes it ideal for heat exchangers in freezing facilities.
Cupronickel has a silvery chrome hue despite its high copper concentration. Because of its excellent corrosion resistance, copper-nickel is used in seawater systems as well as in marine equipment including piping, heat exchangers, and condensers. Also, high-quality propellers, shafts, and hulls are often made from this material. Military, chemical, petrochemical, and electrical equipment applications are some of the other uses for this material.
Copper-nickel alloys are used in the following areas
Desalination units
Hydraulic lines
Fish cages for aquaculture
Heat exchangers and condensers
Seawater pipework
Offshore firewater systems
Tubes for power plants and ships
Pumps, valves, sheathing, and fittings for ship hulls
Types of Copper Nickel Tube
The Copper-Nickel alloy is known for its moderate strength, workability, formability, and weldability. Since it contains 30% nickel, the copper alloy C715 is also known as nickel-copper 70/30. Nickel-Copper 70/30 tubing is well suited for high temperature and pressure applications as well as high speeds and turbulent flows.
The C715 alloy's low iron concentration (up to 0.5%) provides resistance to general corrosion and special stress corrosion cracking, making it ideal for use in marine and industrial applications.
Copper-Nickel Tubes 90/10 are forged copper-nickel alloys ideal for the marine environment as they contain 10-30% nickel. Also, a little amount of iron and manganese are added to improve corrosion resistance. It is a popular grade because of its great ductility and durability. It Cupro Nickel offers outstanding welding and manufacturing qualities. It has a built-in biofouling resistance. It has several excellent properties that make it ideal for use in low to very low temperatures. It possesses antibacterial characteristics that are second to none. It can eliminate 99 percent of bacteria in two hours.
Our product range
| Product Category | Key Grades / Alloys | Common ASTM Standards (Examples) | |
|---|---|---|---|
| Copper Tubes / Pipes | C10100 (OFE), C10200 (OF), C11000 (ETP), C12000 (DLP), C12200 (DHP), C19200, C23000 (Red Brass) | ASTM B68 (Seamless Copper Tube), ASTM B75 (Seamless Copper Tube), ASTM B88 (Water Tube), ASTM B280 (ACR/Refrigeration Tube) |
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| Copper Sheets / Plates | C10100, C10200, C11000, C12200, C26000 (Cartridge Brass), C26800, C70600 (90-10 CuNi), C71500 (70-30 CuNi) |
ASTM B152 (Copper Sheet/Strip), ASTM B248 (Copper Plate) |
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| Copper Rods / Bars | C10100, C11000, C14500 (Tellurium Copper), C14700 (Sulfur Copper), C36000 (Free-Cutting Brass), C46400 (Naval Brass) |
ASTM B133 (Copper Rod/Bar), ASTM B16 (Free-Cutting Brass Rod) |
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| Copper Wires | C10100, C10200, C11000 | ASTM B1 (Hard-Drawn Copper Wire), ASTM B2 (Medium-Hard Copper Wire), ASTM B3 (Soft/Annealed Copper Wire) |
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| Copper Foils | C10100, C10200, C11000 | ASTM B103 (Phosphor Bronze Strip/Foil),* ASTM B152 (Copper Strip/Foil), IPC-4562 (PCB Foil Standards) |
Our factory
We are a leading manufacturer specializing in a comprehensive range of precision copper products, including tubes, sheets, rods, wires, and foils. Our advanced manufacturing facility operates with a full suite of modern equipment-from hot rolling mills and extrusion presses to precision drawing machines and automated finishing lines-enabling strict control over every production stage.
Committed to excellence, we adhere to major international standards such as ASTM, EN, JIS, and GB, supported by a rigorous quality management system. Our products serve diverse industries, including HVAC&R, electrical and electronics, automotive, construction, and industrial engineering. With strong in-house technical expertise, flexible customization capabilities, and a reliable supply chain, we deliver high-performance, cost-effective copper solutions to partners worldwide.
copper product packaging
To ensure every copper product you order receives reliable protection throughout transportation and storage, we provide systematic professional packaging solutions based on product type and shipping requirements. These include export-standard wooden crates, moisture-proof reinforced cartons, steel-structure pallet bundling, stretch film protection, and specialized end caps for tubing. Each batch of products undergoes cleaning and anti-rust treatment, followed by layered isolation wrapping using materials such as anti-rust paper, polyethylene foam, and bubble wrap to effectively prevent scratches and impacts. We also offer nitrogen-filled modified atmosphere packaging upon customer request, where inert nitrogen is injected into a sealed environment to significantly inhibit oxidation and moisture erosion. This is particularly suitable for copper materials with high surface quality requirements, long-term storage, or special environmental transportation, ensuring the products maintain their factory-level finish and performance upon arrival. All packaging is clearly labeled and accompanied by complete shipping documentation to ensure full traceability and ease of handling throughout the logistics process.
