C71000 Copper Nickel
Product Overview
C71000 copper nickel, also known as 80/20 copper nickel, is a copper-nickel alloy containing approximately 20% nickel. Compared with pure copper and lower nickel CuNi alloys, C71000 provides improved corrosion resistance, mechanical stability, and resistance to seawater erosion.
The alloy maintains good thermal conductivity while offering excellent resistance to biofouling, stress corrosion cracking, and marine environments, making it suitable for demanding applications where long-term reliability is required.
C71000 is commonly supplied in tubes, sheets, plates, bars, and other semi-finished forms for marine engineering, heat exchangers, offshore systems, and industrial equipment.
Key Features
Available Sizes
| Copper Shape | Thickness (mm) | Width/Diameter (mm) | Length (m) |
|---|---|---|---|
| Bar | - | Φ5-200 | 1-6 |
| Wire | - | Φ0.05-10 | Customize |
| Sheet | 0.25-6 | 500-2500 | 1-6 |
| Plate | 6-200 | 200-3000 | 1-6 |
| Strip | 0.15-6 | 8-610 | Customize |
| Tube | OD: φ2-600; WT:φ0.2-100mm | - | 1-6 |
| Coil | 0.15-6 | 3-1250 | 1-6 |
| Foil | < 0.15 | 10-1350 | Customize |
| Profile | Customized | Customize | Customize |
* Custom sizes available upon request. Contact our sales team for special requirements.
Technical Specifications
01 Chemical Composition
| Specification | Value |
|---|---|
| Copper (Cu) | Balance |
| Nickel (Ni) | 19.0–21.0% |
| Iron (Fe) | 0.5–1.5% |
| Manganese (Mn) | ≤1.0% |
| Zinc (Zn) | ≤1.0% |
02 Mechanical & Physical Properties
| Property | Value |
|---|---|
| Density | 8.9 g/cm³ |
| Tensile Strength | 360–450 MPa |
| Yield Strength | 120–250 MPa |
| Elongation | 20–40% |
| Electrical Conductivity | ~10–15% IACS |
| Thermal Conductivity | ~40–50 W/m·K |
| Melting Range | 1170–1240°C |
Applications & Use Cases
Proven solutions across diverse industries. From aerospace to marine environments.
FAQ — C71000 Copper Nickel
Common engineering questions on C71000 copper nickel: composition, standards, properties and supply.
