Civen Metal Material (Shanghai) Co., Ltd. is one of the leading manufacturers and suppliers of copper nickel foil in China. Welcome to buy bulk durable copper nickel foil made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.
Copper Nickel Foil for Resistance and Precision Electrical Components
Copper nickel foil is a rolled copper-based alloy material used in applications where electrical resistance, resistance stability and material formability are important. Its electrical and mechanical characteristics depend on the alloy composition and material condition, so selecting a grade should begin with the requirements of the finished component rather than thickness alone.
CIVEN Metal lists three alloy designations for copper nickel foil: ASTM C75200, BZn 18-26 and BMn 40-1.5. The available product is supplied in coil form, with listed thicknesses from 0.01 to 0.15 mm and widths from 4 to 250 mm.
Alloy Grades and Composition
The listed grades have different composition profiles. ASTM C75200 and BZn 18-26 are shown with nickel-plus-cobalt content of 16.5–19.5, while BMn 40-1.5 is listed with a higher nickel-plus-cobalt range of 39.0–41.0 and manganese content of 1.0–2.0. These differences matter when evaluating the material for a specific electrical or mechanical design.
Before specifying a grade, confirm the applicable composition standard and the required limits for the finished component. The composition figures should be checked against the current technical data sheet, including the units and the meaning of each listed value.
Electrical Characteristics and Processing
The current product data describes copper nickel alloy as a resistance material with a low temperature coefficient of resistivity. It also lists a resistivity value of 0.48 μΩ·m. Because electrical properties can vary by alloy grade and material condition, confirm that this value applies to the selected grade before using it in design calculations.
The foil is described as having good processability and solderability. Its rolled form can be shaped and laminated, while annealing can be used to adjust the soft or hard condition. For production planning, buyers should specify the required temper or material condition, forming method and any relevant soldering or lamination requirements. When comparing copper alloy materials for a specific component, Beryllium Copper Foil may also be relevant to review, depending on the required properties and application.
Copper Nickel Foil Specifications
The following dimensions and tolerances are listed for CIVEN Metal copper nickel foil.
| Parameter | Listed specification |
|---|---|
| Product form | Coil |
| Thickness | 0.01–0.15 mm |
| Width | 4–250 mm |
| Thickness tolerance | ≤ ±0.003 mm |
| Width tolerance | ≤ 0.1 mm |
| Listed alloy grades | ASTM C75200, BZn 18-26, BMn 40-1.5 |
Confirm the required grade, temper and dimensional tolerances when requesting a quotation. If the component requires a particular electrical resistance, surface condition or forming behavior, include those requirements in the inquiry so the material can be evaluated against the intended use.
Applications of Copper Nickel Foil
The product information identifies several uses for copper nickel alloy, including precision resistors, sliding resistors, resistance strain gauges, thermocouples and thermocouple compensation wire. These applications rely on the electrical behavior of the selected alloy and its suitability for the operating environment.
For resistance components, buyers should confirm the target resistance, temperature range and required stability. For formed or laminated parts, thickness, width, temper and processing conditions may also affect material selection. Corrosion resistance and solderability should be assessed against the actual working environment and assembly process.
Selecting Copper Nickel Foil for Production
When sourcing copper nickel foil, provide the information that determines whether a grade is suitable for the finished part:
• Alloy designation: ASTM C75200, BZn 18-26 or BMn 40-1.5, or the applicable composition requirement.
• Dimensions: Required thickness, width and dimensional tolerances.
• Material condition: Required soft or hard temper, if specified by the design.
• Electrical requirements: Target resistivity or resistance behavior and operating temperature range.
• Processing requirements: Forming, soldering, lamination or other downstream operations.
• Order details: Estimated quantity, coil requirements and intended application.
These details help establish whether the listed material specifications match the component and production process. If you are also evaluating other copper alloy foil options, RA Bronze Foil is another material category to review, although its composition and properties differ from those of copper nickel foil.
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