Home > Copper Nickel Alloy >

Ultra - Thin In - Stock CuNi44 Foil 0.0125mm Thick x 102mm Wide High Precision & Corrosion Resistance

Product Categories

Low Expansion Alloy [48]
Soft Magnetic Alloy [19]
Elastic Alloy [10]
Thermal Bimetal [11]
Welding Wire [22]
Thermal Spray Wire [27]
Nichrome Alloy [62]
Pure Nickel [24]
Copper Nickel Alloy [24]
Thermocouple Cable [43]
Monel Alloy [9]
Inconel Alloy [25]
Hastelloy Alloy [5]
High Temperature Alloy [24]
Nitinol Alloy [9]
To Header [22]
Others [4]

Huona (Shanghai) New Material Co., Ltd.

Trust Seal

Verified Supplier

Credit Check

Supplier Assessment

Contact Now

Ultra - Thin In - Stock CuNi44 Foil 0.0125mm Thick x 102mm Wide High Precision & Corrosion Resistance

Name: Ultra Thin In Stock CuNi44 Foil 00125mm Thick x 102mm Wide High Precision amp Corrosion Resistance
Brand: Huona
Price: 1 USD

Brand Name : Huona

Model Number : CuNi44

Certification : ISO9001

Place of Origin : Shanghai

MOQ : 10kg

Price : Negotiable

Payment Terms : L/C,T/T,Western Union,MoneyGram

Supply Ability : 500 tons per month

Delivery Time : 5-21 days

Packaging Details : Carton/Wooden Case

Density : 8.9 g/cm³

Melting point : 1230-1290 ℃

Electrical conductivity : 2m/Ω mm²/m (at 20 °C R330)

Electrical resistivity : 0.49 Ωmm²/m (at 20 °C R330)

Temperature coefficient of electrical resistance : -80 to +40·10-6/K (at 20 to 105 °C R330)

Thermal conductivity : 23 W/K m (at 20 °C)

Thermal capacity : 0.41 J/g K (at 20 °C)

Coefficient of thermal expansion (linear) : 14.5·10-6/K (at 20 to 300 °C)

Contact Now

Product Description

CuNi44 Foil (0.0125mm Thickness × 102mm Width)

Product Overview

CuNi44 foil (0.0125mm × 102mm), this copper-nickel resistance alloy, also known as constantan, is characterized by a high electrical resistance
coupled with a fairly small temperature coefficient of the resistance. This alloy also shows high tensile strength
and resistance towards corrosion. It can be used at temperatures of up to 600°C in air.

Standard Designations

Alloy Grade: CuNi44 (Copper-Nickel 44)
UNS Number: C71500
International Standards: Complies with DIN 17664, ASTM B122, and GB/T 2059
Dimensional Specification: 0.0125mm thickness × 102mm width
Manufacturer: Huona New Material, certified to ISO 9001 for precision alloy processing

Key Advantages (vs. Standard CuNi44 Foils)

This 0.0125mm × 102mm CuNi44 foil stands out for its targeted ultra-thin and fixed-width design:

Ultra-Thin Precision: 0.0125mm thickness (equivalent to 12.5μm) achieves industry-leading thinness, enabling miniaturization of electronic componentswithout sacrificing mechanical strength.
Stable Resistance Performance: Resistivity of 49 ± 2 μΩ·cm at 20°C and low temperature coefficient of resistance (TCR: ±40 ppm/°C, -50°C to 150°C)—ensures minimal resistance drift in high-precision measurement scenarios, outperforming thinner non-alloy foils.
Strict Dimensional Control: Thickness tolerance of ±0.0005mm and width tolerance of ±0.1mm (102mm fixed width) eliminate material waste in automated production lines, reducing post-processing costs for customers.
Excellent Formability: High ductility (elongation ≥25% in annealed state) allows for complex micro-stamping and etching (e.g., fine resistor grids) without cracking—critical for precision electronic manufacturing.
Corrosion Resistance: Passes 500-hour ASTM B117 salt spray testing with minimal oxidation, ensuring long-term reliability in humid or mild chemical environments.

Technical Specifications

Attribute	Value
Chemical Composition (wt%)	Ni: 43 - 45 % Cu: balance Mn: ≤1.2 %
Thickness	0.0125mm (tolerance: ±0.0005mm)
Width	102mm (tolerance: ±0.1mm)
Temper	Annealed (soft, for easy processing)
Tensile Strength	450-500 MPa
Elongation (25°C)	≥25%
Hardness (HV)	120-140
Resistivity (20°C)	49 ± 2 μΩ·cm
Surface Roughness (Ra)	≤0.1μm (bright annealed finish)
Operating Temperature Range	-50°C to 300°C (continuous use)

Product Specifications

Item	Specification
Surface Finish	Bright annealed (oxide-free, no oil residues)
Supply Form	Continuous rolls (length: 50m-300m, on 150mm plastic spools)
Flatness	≤0.03mm/m (critical for uniform etching)
Etchability	Compatible with standard acid etching processes (e.g., ferric chloride solutions)
Packaging	Vacuum-sealed in anti-oxidation aluminum foil bags with desiccants; outer carton with shock-absorbing foam
Customization	Optional anti-tarnish coating; cut-to-length sheets (minimum 1m); adjusted roll lengths for automated lines

Typical Applications

Micro-Electronics: Thin-film resistors, current shunts, and potentiometer elements in wearable devices, smartphones, and IoT sensors (0.0125mm thickness enables compact PCB design).
Strain Gauges: High-precision strain gauge grids (102mm width fits standard gauge manufacturing panels) for load cells and structural stress monitoring.
Medical Devices: Miniature heating elements and sensor components in implantable devices and portable diagnostic tools (corrosion resistance ensures biocompatibility with body fluids).
Aerospace Instrumentation: Precision resistance components in avionics (stable performance under temperature fluctuations at high altitudes).
Flexible Electronics: Conductive layers in flexible PCBs and foldable displays (ductility supports repeated bending).

Huona New Material implements rigorous quality control for this ultra-thin CuNi44 foil: each batch undergoes thickness measurement (via laser micrometer), chemical composition analysis (XRF), and resistance stability testing. Free samples (100mm × 102mm) and detailed material test reports (MTR) are available upon request. Our technical team provides tailored support—including etching parameter recommendations and anti-oxidation storage guidelines—to help customers maximize the performance of this precision foil in micro-manufacturing scenarios.

Product Tags: