Copper Nickel Alloy

Copper Nickel Alloy (CuNi Alloy) Product Introduction–Multi-scenario solutions for corrosion resistance and high strength

Copper Nickel Alloy (Cu-Ni Alloy) is a functional material with copper as the matrix and nickel as the main alloying element, and the common models include Cu-Ni 90/10 (C70600), Cu-Ni 70/30 (C71500), and high-nickel corrosion-resistant alloys (e.g. Monel 400/ K500). These materials are known for their excellent seawater corrosion resistance, biofouling resistance, high thermal and electrical conductivity, and excellent process ability, making them ideal for use in offshore engineering, chemical equipment, power electronics, and other fields.

Advantage of Copper Nickel

Omni-directional corrosion resistance

Seawater corrosion resistance: In seawater, salt spray and chloride environment, copper-nickel alloy surface forms dense oxide film, corrosion rate is less than 0.025 mm/year, especially suitable for ship pipelines, desalination equipment.

Acid-resistant medium: stable resistance to dilute sulfuric acid, phosphoric acid, organic acids

Functional Versatility

Thermal/Electrical Conductivity: Conductivity of 14%–25% IACS (higher than stainless steel), suitable for high-current connectors and battery tabs.

Non-Magnetic: No hysteresis loss in strong magnetic fields, perfect for precision instruments and submarine cable sheaths.

Wear Resistance: Surface hardness can be enhanced via cold working, meeting the needs of wear-prone components like valves and pump bodies.

Strong mechanical properties

Excellent hot and cold processing performance: can be rolled, stretched, forged into plate, pipe, wire, hardness range 80~250 HV (annealed to hard state).

Good low-temperature toughness: maintains good ductility at -196°C, suitable for LNG storage tanks and low-temperature heat exchangers.

Product Type:

copper nickel sheet, copper nickel tube, copper nickel bar, copper nickel round bar, copper nickel alloy tubing

Product Forms & Specifications

Why Choose Copper Nickel Material?

• Low Lifecycle Costs: Corrosion resistance minimizes maintenance downtime and replacement frequency.
• Adaptability to Harsh Environments: Consistent performance in Arctic cold, tropical seas, acidic chemical plants, and high-humidity electrical fields.
• Sustainability: Over 90% recyclability, aligning with green manufacturing trends.

• Aerospace | Thomas Mitchell (USA)

How an aerospace procurement manager sourced 99.97% pure tungsten rods with custom specs and received delivery in half the expected lead time… Read Full Case Study

• Automotive | Marco Rossi (Italy)

How a car modification expert used custom CNC-machined tungsten alloy weights to fine-tune a vintage sports car’s handling—just in time for a major auto show… Read Full Case Study

• Electronics | Dr. Elena Carter (Canada)

How a semiconductor engineer replaced aluminum with MoCu heat sinks, improving thermal performance by 20°C while meeting aerospace-grade standards…  Read Full Case Study

Frequently Asked Questions (FAQ)

Q1: What are the typical grades of copper nickel alloy offered by FOTMA?

A1: FOTMA supplies several standard CuNi alloy grades, including:

• CuNi10Fe1Mn (UNS C70600)

• CuNi30Mn1Fe (UNS C71500)

• Monel 400 (UNS N04400)

  These alloys are chosen for their excellent resistance to seawater corrosion and good mechanical strength.

Q2: What forms are available for copper nickel alloys?

A2: Copper nickel alloys are offered in multiple forms to suit different industrial needs:

• Plates: Thickness from 0.5 mm to 50 mm

• Tubes: Outer diameter from 6 mm to 300 mm

• Wires: Diameter from 0.1 mm to 20 mm

• Forged parts: Based on custom drawings or specifications

Q3: What is the typical chemical composition of CuNi alloys?

A3: General chemical composition includes:

• Nickel (Ni): 10–30%

• Copper (Cu): Balance

• Iron (Fe): 1–2%

• Manganese (Mn): 0.5–1.5%

  (Note: Monel 400 contains ≥63% Nickel)

Q4: What are the mechanical properties of copper nickel alloy products?

A4: Mechanical performance typically includes:

• Tensile strength: 300–600 MPa

• Elongation: 25–45%

  This balance provides both strength and ductility, ideal for marine, heat exchanger, and industrial piping applications.

Q5: What industries typically use copper nickel alloys?

A5: FOTMA’s CuNi alloys are commonly used in:

• Marine engineering and desalination plants

• Heat exchangers and condensers

• Power generation and offshore platforms

• Cryogenic equipment and shipbuilding