Cupronickel
CN1 / CNP3
C70600 / C71500
- Corrosion Resistance
A Cu-Ni-based solid-solution-strengthened copper alloy offering excellent resistance to seawater corrosion and biofouling. It ensures long-term reliability even in flowing seawater and other corrosive environments.
Positioning map
Main features
- It is highly resistant to general corrosion, pitting, and stress corrosion cracking in seawater.
- It shows stable corrosion resistance even in high-velocity fluids.
- It has excellent biofouling (antifouling) resistance and good maintainability.
- It has good weldability and workability.
Chemical composition
The chemical composition of CN1（C70600）is as follows.
（Weight%）
| Fe | Ni | Cu |
|---|---|---|
| 1.0-1.8 | 9.0-11.0 | Rem. |
The chemical composition of CNP3（C71500）is as follows.
（Weight%）
| Fe | Ni | Cu |
|---|---|---|
| 0.40-1.0 | 29.0-33.0 | Rem. |
Technical Data
Physical properties
The physical properties of CN1（C70600）are as follows.
| Property | Typical value |
|---|---|
| Specific Gravity (293K) | 8.94 |
| Coefficient of Thermal Expansion (×10-6/K：293～573K) |
17.1 |
| Thermal Conductivity (W/(m・K)：293K) |
45 |
| Volume Resistivity (μΩm：293K) |
0.191 |
| Electrical Conductivity (%IACS:293K) |
9 |
| Modulus of Elasticity（kN/mm²:293K） | 124 |
The physical properties of CNP3（C71500）are as follows.
| Property | Typical value |
|---|---|
| Specific Gravity (293K) | 8.94 |
| Coefficient of Thermal Expansion (×10-6/K：293～573K) |
16.2 |
| Thermal Conductivity (W/(m・K)：293K) |
29.4 |
| Volume Resistivity (μΩm：293K) |
0.375 |
| Electrical Conductivity (%IACS:293K) |
4.6 |
| Modulus of Elasticity（kN/mm²:293K） | 150 |
Mechanical properties
The mechanical properties of CN1（C70600）are as follows.
| Typical value | |
|---|---|
| Tensile Strength (N/mm²) |
320 |
| Elongation (%) |
50 |
The mechanical properties of CNP3（C71500）are as follows.
| Typical value | |
|---|---|
| Tensile Strength (N/mm²) |
360 |
| Elongation (%) |
58 |