CuNi (Copper-Nickel) alloys for different cable applications

CuNi (Copper-Nickel) alloys for different cable applications:

1. Heating Cables (Self-Regulating & Constant Wattage)

✅ Recommended Alloys:

• CuNi44 (Constantan, 55% Cu, 44% Ni) – High resistivity, stable heating performance.

• CuNi23 (23% Ni, 77% Cu) – Medium resistivity, used in flexible heating elements.

• CuNi10 (10% Ni, 90% Cu) – Lower resistance, used for heating cables with fast response.

✅ Application Examples:

• Floor heating cables

• Pipe freeze protection cables

• Industrial heat tracing

2. Resistance Cables (Precision & Load Bank)

✅ Recommended Alloys:

• CuNi44 (Constantan) – High-precision resistance, minimal temperature drift.

• CuNi34 (34% Ni, 66% Cu) – Moderate resistance for stable load control.

✅ Application Examples:

• Load banks for power testing

• Precision resistors in instrumentation cables

• Current sensing in high-power systems

3. Thermocouple & Sensor Cables

✅ Recommended Alloys:

• CuNi44 (Constantan) – Used as the negative leg in Type T (Copper-Constantan) thermocouples.

• CuNi10 (Cupronickel 10) – Used in RTD (Resistance Temperature Detector) sensor cables.

✅ Application Examples:

• Thermocouple extension cables (Type T, Type E)

• Temperature monitoring systems

• RTD cables for industrial and lab applications

4. Marine & Corrosion-Resistant Cables

✅ Recommended Alloys:

• CuNi10 (90-10 CuNi) – High seawater corrosion resistance, used in offshore cables.

• CuNi30 (70-30 CuNi) – Superior strength and corrosion resistance in harsh environments.

✅ Application Examples:

• Underwater and submarine power cables

• Shipboard wiring for power distribution

• Oil rig electrical cables

5. EMI Shielding & Low-Noise Signal Cables

✅ Recommended Alloys:

• CuNi6 (6% Ni, 94% Cu) – Low resistance, excellent EMI shielding.

• CuNi10 (10% Ni, 90% Cu) – Used in medical and aerospace shielded cables.

✅ Application Examples:

• Aerospace signal transmission cables

• Medical sensor cables with low noise interference

• High-precision measuring instruments

Summary of Alloy Selection for Different Cables