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ABOUT
Cu-Ni alloys
Cupro-nickel alloys, within the context of metallurgy and the heating industry, refer to a specialized group of metallic materials meticulously crafted from copper (Cu) and nickel (Ni). The metallurgical synergy of these two elements results in alloys with tailored properties, making them pivotal in applications demanding both robust structural integrity and thermal performance.
Metallurgical Aspect
Cupro-nickel alloys are forged through a metallurgical journey wherein the precise blending of copper and nickel plays a pivotal role. The Cupro-nickel’s microstructure is carefully engineered to exhibit not only the mechanical strength imparted by nickel but also the inherent corrosion resistance characteristic of copper. This harmonious metallurgical composition ensures that the alloy maintains structural integrity under diverse thermal and environmental conditions.
Heating Industry Exploration
In the heating industry, cupro-nickel alloys shine as exemplary materials for heating elements, furnaces, and various thermal processing equipment. Their metallurgical properties, such as high thermal conductivity and resistance to oxidation and corrosion, make them indispensable in applications where efficient and reliable heat generation is paramount.
We are manufacturing the Cuperonickel alloys as per the accordance with DIN 17471. This alloys made in the Tempsens instrument private limited, Udaipur facilities with specialized equipment. The following grades are manufactured.
| Identification accordance with DIN 17471 | Grades | Percentage of Nickel | Percentage of Copper & Other elements |
|---|---|---|---|
| Cu Ni 2 | Alloy 5 | 2% | 98% |
| Cu Ni 6 | Alloy 10 | 6% | 94% |
| Cu Ni 10 | Alloy 15 | 10% | 90% |
| Cu Ni 23 | Alloy 30 | 23% | 75.5% (1.5% Mn) |
| Cu Ni 30 | Alloy 40 | 30% | 73%(3% Mn) |
| Cu Ni 44 | Alloy 44 | 44% | 55% (1% Mn) |
| Identification accordance with DIN 17471 | Solldus temp 0°C | Specific Heat at 20°C J/(g,K) | Operating Temp 0°C | Thermal Conductivity at 20°C W/(m.K) | Mean of coefficient expansion (20 to 400°C) 10-6/K |
|---|---|---|---|---|---|
| Cu Ni 2 | 1090 | 0.38 | 300 | 130 | 17.5 |
| Cu Ni 6 | 1095 | 0.38 | 300 | 92 | 17.5 |
| Cu Ni 10 | 1100 | 0.38 | 400 | 59 | 17.5 |
| Cu Ni 23 | 1150 | 0.37 | 400 | 33 |
17.5 |
| Cu Ni 30 | 1180 | 0.4 | 450 | 25 | 16 |
| Cu Ni 44 | 1230 | 0.41 | 500 | 23 | 15 |
The key properties of cupro-nickel alloys stem from the synergistic combination of copper and nickel, resulting in a material with unique characteristics. These properties make cupro-nickel alloys valuable in various applications, especially in industries such as metallurgy and heating
Major Material properties are as below
While not as high as pure copper, cupro-nickel alloys still possess following properties and this balance between the nickel and copper with certain other elements are makes alloys desirable with several flowing properties
- Electrical Conductivity.
- high thermal conductivity, .
- Resistance to Electromigration.
- Magnetic Properties – non-ferromagnetic.
- Low Temperature Coefficient of Resistanc.
- Solderability.
- Galvanic Compatibility
The following table illustrated the resistivity of the alloy with certain temperature.
| Identification accordance with DIN 17471 | Electrical Resistivity in Ω mm2/m | |||||
|---|---|---|---|---|---|---|
| 20°C | 100°C | 200°C | 300°C | 400°C | 500°C | |
| CuNi2 | 0.05 | 0.06 | 0.06 | — | — | — |
| CuNi6 | 0.1 | 0.11 | 0.11 | 0.12 | — | — |
| CuNi10 | 0.15 | 0.16 | 0.16 | 0.17 | 0.18 | — |
| CuNi23 | 0.3 | 0.31 | 0.32 | 0.32 | 0.34 | — |
| CuNi30 | 0.4 | 0.4 | 0.41 | 0.42 | 0.42 | 0.43 |
| CuNi44 | 0.49 | 0.49 | 0.49 | 0.49 | 0.49 | 0.49 |
Applications
- Electrical resistor
- Shunts and Switch units
- Low temp. heating cables
- Electrical Heating pads
- Heating mats
- Heat exchangers.
- Piping material for chemical Industry.
- Coins – where cupro-nickel is used for its durability and resistance to corrosion.
- Aerospace Components
- Coils and windings in electromagnetic components
Available form – Wire and Bar in acid wash and luster surface
Available Diameters – 8.0 mm to 0.16 mm
Quality check and Analysis – Each spool and Coils has been pass through all properties testing in Tempsens Instrument private limited, Udaipur – NABL accredited lab. Test certificates has been provided.
