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CuNi44 NC050 Foil High-Performance Nickel-Copper Alloy for Electrical & Industrial Use

Short Description:


  • Thickness Range: 0.005mm - 0.1mm (custom up to 0.5mm)
  • Width Range: 10mm - 600mm
  • Thickness Tolerance: ±0.0005mm (for ≤0.01mm); ±0.001mm (for >0.01mm)
  • Width Tolerance: ±0.1mm
  • Tensile Strength: 450 - 550 MPa (annealed state)
  • Elongation: ≥25% (annealed state)
  • Hardness (HV): 120 - 160 (annealed); 200 - 250 (half-hard)
  • Surface Roughness (Ra): ≤0.1μm (polished finish)
  • Product Detail

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    Product Description

    CuNi44 Foil

    Product Overview

    CuNi44 foil is a high-performance copper-nickel alloy foil with a nominal nickel content of 44%, offering exceptional electrical resistance stability, corrosion resistance, and formability. This precision-engineered foil is produced through advanced rolling processes to achieve tight dimensional tolerances, making it ideal for applications requiring consistent electrical properties and thin-gauge material performance—such as precision resistors, strain gauges, and thermocouple components.

    Standard Designations

    • Alloy Grade: CuNi44 (Copper-Nickel 44)
    • UNS Number: C71500
    • DIN Standard: DIN 17664
    • ASTM Standard: ASTM B122

    Key Features

    • Stable Electrical Resistance: Low temperature coefficient of resistance (TCR) of ±40 ppm/°C (typical) over -50°C to 150°C, ensuring minimal resistance drift in temperature-fluctuating environments.
    • High Resistivity: 49 ± 2 μΩ·cm at 20°C, suitable for high-precision resistance components.
    • Excellent Formability: High ductility allows for cold rolling to ultra-thin gauges (down to 0.005mm) and complex stamping without cracking.
    • Corrosion Resistance: Resistant to atmospheric corrosion, freshwater, and mild chemical environments (complies with ISO 9227 salt spray test for 500 hours with minimal oxidation).
    • Thermal Stability: Maintains mechanical and electrical properties up to 300°C (continuous use).

    Technical Specifications

    Attribute Value
    Thickness Range 0.005mm – 0.1mm (custom up to 0.5mm)
    Width Range 10mm – 600mm
    Thickness Tolerance ±0.0005mm (for ≤0.01mm); ±0.001mm (for >0.01mm)
    Width Tolerance ±0.1mm
    Tensile Strength 450 – 550 MPa (annealed state)
    Elongation ≥25% (annealed state)
    Hardness (HV) 120 – 160 (annealed); 200 – 250 (half-hard)
    Surface Roughness (Ra) ≤0.1μm (polished finish)

    Chemical Composition (Typical, %)

    Element Content (%)
    Nickel (Ni) 43.0 – 45.0
    Copper (Cu) Balance (55.0 – 57.0)
    Iron (Fe) ≤0.5
    Manganese (Mn) ≤1.0
    Silicon (Si) ≤0.1
    Carbon (C) ≤0.05
    Total Impurities ≤0.7

    Product Specifications

    Item Specification
    Surface Finish Annealed (bright), polished, or matte
    Supply Form Rolls (length: 50m – 500m) or cut sheets (custom sizes)
    Packaging Vacuum-sealed in moisture-proof bags with anti-oxidation paper; wooden spools for rolls
    Processing Options Slitting, cutting, annealing, or coating (e.g., insulation layers for electrical applications)
    Quality Certification RoHS, REACH compliant; material test reports (MTR) available

    Typical Applications

    • Electrical Components: Precision resistors, current shunts, and potentiometer elements.
    • Sensors: Strain gauges, temperature sensors, and pressure transducers.
    • Thermocouples: Compensation wires for Type T thermocouples.
    • Shielding: EMI/RFI shielding in high-frequency electronic devices.
    • Heating Elements: Low-power heating foils for medical and aerospace equipment.

     

    We offer custom processing services tailored to specific application requirements. Free samples (100mm × 100mm) and detailed material certificates are available upon request.

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