Virami Steel Hub is a leading manufacturer, supplier, stockist, and exporter of high-quality Copper Nickel 70/30 Wires in Mumbai, India. We specialize in supplying premium Cu-Ni 70/30 alloy wires that deliver exceptional resistance to seawater corrosion, superior mechanical strength, and long-term durability in aggressive marine and industrial environments.
With advanced processing facilities, stringent quality control, and a strong global distribution network, we supply Copper Nickel 70/30 wires across India and export to the USA, Europe, the Middle East, Africa, and Southeast Asia. Our products comply with international standards such as ASTM and ASME, ensuring reliability, traceability, and consistent performance.
Copper Nickel 70/30, also known as CuNi 70/30, is a copper-based alloy composed primarily of:
This alloy was specifically developed to provide enhanced strength and superior resistance to corrosion in high-velocity seawater environments compared to Copper Nickel 90/10. Due to its excellent resistance to biofouling, erosion, stress corrosion cracking, and marine growth, Copper Nickel 70/30 wires are widely used in shipbuilding, offshore platforms, desalination plants, heat exchangers, and power generation industries.
The alloy combines the corrosion resistance of copper with the strength and durability of nickel, making it one of the most reliable materials for marine engineering applications.
Key Features of Copper Nickel 70/30 Wires
Copper Nickel 70/30 wires offer numerous advantages that make them suitable for critical environments:
These characteristics make CuNi 70/30 wires a preferred choice in offshore and marine engineering sectors.
The typical chemical composition of Copper Nickel 70/30 wires includes:
| Element | Composition (%) |
|---|---|
| Copper (Cu) | Balance (~65–71%) |
| Nickel (Ni) | 29–33% |
| Iron (Fe) | 0.4–1.0% |
| Manganese (Mn) | 0.5–1.0% |
| Carbon (C) | 0.05% max |
| Lead (Pb) | 0.02% max |
| Zinc (Zn) | 1.0% max |
Role of Key Alloying Elements
The precise control of these elements ensures optimal corrosion resistance and mechanical performance.
These properties make the alloy suitable for demanding structural and marine applications where both strength and corrosion resistance are critical.
The alloy maintains dimensional stability and structural integrity even during temperature variations and prolonged seawater exposure.
One of the primary advantages of Copper Nickel 70/30 wires is their exceptional resistance to corrosion. They perform exceptionally well in:
The alloy forms a thin, adherent protective oxide film that prevents further corrosion. This passive film ensures long-term durability even in highly aggressive marine conditions.
Additionally, Copper Nickel 70/30 provides excellent resistance to:
This makes it one of the most reliable materials for seawater handling systems.
Copper Nickel 70/30 is not hardenable by heat treatment. Instead, it gains strength through cold working.
Annealing Process:
Annealing restores ductility after cold working and ensures uniform mechanical properties.
The alloy offers excellent fabrication characteristics and can be easily:
These properties make it suitable for wire production and customized fabrication.
Copper Nickel 70/30 wires are highly weldable using standard welding techniques.
Recommended welding methods include:
Important welding considerations:
Proper welding ensures structural integrity and preserves corrosion resistance.
Copper Nickel 70/30 has moderate machinability compared to free-cutting brasses.
Recommended practices include:
Following proper machining practices ensures precision dimensions and improved surface finish.
At Virami Steel Hub, we supply Copper Nickel 70/30 wires in various sizes and specifications.
Standards:
Size Range:
Surface Finishes:
Custom diameters, finishes, and packaging solutions are available as per industrial requirements.
Marine & Offshore Industry
Heat Exchangers & Condensers
Oil & Gas Industry
Power Generation
Chemical & Industrial Applications
Copper Nickel 70/30 wires are widely used wherever long-term seawater corrosion resistance and durability are essential.
At Virami Steel Hub, quality is our top priority. All Copper Nickel 70/30 wires undergo strict quality control procedures:
Mill Test Certificates (MTC) are provided as per ASTM and ASME standards. Third-party inspections are available upon request.
Our strong logistics network enables safe and efficient shipping to domestic and international clients.
We are committed to delivering premium materials that meet the highest industry standards.
Copper Nickel 70/30 wires are high-performance alloy wires designed to provide exceptional seawater corrosion resistance, mechanical strength, and long service life in aggressive marine and industrial environments. Their superior resistance to biofouling, erosion, and stress corrosion cracking makes them an ideal solution for offshore, shipbuilding, desalination, and power generation industries.
Virami Steel Hub supplies certified Copper Nickel 70/30 winds that ensure durability, reliability, and compliance with global standards. Our commitment to quality, precision manufacturing, and customer satisfaction makes us a preferred supplier worldwide.
