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CuNi44 Flat Wire (ASTM C71500/DIN CuNi44) Nickel-Copper Alloy for Electrical

China CuNi44 Flat Wire (ASTM C71500/DIN CuNi44) Nickel-Copper Alloy for Electrical

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CuNi44 Flat Wire (ASTM C71500/DIN CuNi44) Nickel-Copper Alloy for Electrical

MOQ： 10kg
Price： Negotiable
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Payment Terms	L/C,T/T,Western Union,MoneyGram
Supply Ability	500 tons per year
Delivery Time	5-21 days
Packaging Details	Carton/Wooden Case
Product Name	CuNi44 flat wire
Thickness Range	0.05mm – 0.5mm
Width Range	0.2mm – 10mm
Tensile Strength	450 – 550 MPa (annealed)
Elongation	≥20% (annealed)
Hardness (HV)	130 – 170 (annealed); 210 – 260 (half-hard)
Chemical Composition (Typical, %)	Ni:43-45%
Surface Finish	Bright annealed (Ra ≤0.2μm)
Brand Name	Huona
Model Number	CuNi44
Certification	ISO9001
Place of Origin	Shanghai

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Product Details
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Product Specification


Payment Terms	L/C,T/T,Western Union,MoneyGram	Supply Ability	500 tons per year
Delivery Time	5-21 days	Packaging Details	Carton/Wooden Case
Product Name	CuNi44 flat wire	Thickness Range	0.05mm – 0.5mm
Width Range	0.2mm – 10mm	Tensile Strength	450 – 550 MPa (annealed)
Elongation	≥20% (annealed)	Hardness (HV)	130 – 170 (annealed); 210 – 260 (half-hard)
Chemical Composition (Typical, %)	Ni:43-45%	Surface Finish	Bright annealed (Ra ≤0.2μm)
Brand Name	Huona	Model Number	CuNi44
Certification	ISO9001	Place of Origin	Shanghai
High Light	CuNi44 flat wire for electrical components ，Nickel-copper alloy flat wire ASTM C71500 ，DIN CuNi44 flat wire with warranty

Product Description

CuNi44 Flat Wire

Product Advantages and Grade Distinctions

CuNi44 flat wire stands out for its exceptional electrical resistance stability and mechanical workability, making it a superior choice for precision electrical components. Compared to similar copper-nickel alloys like CuNi10 (Constantan) and CuNi30, CuNi44 offers a higher resistivity (49 μΩ·cm vs. 45 μΩ·cm for CuNi30) and a lower temperature coefficient of resistance (TCR), ensuring minimal resistance drift in temperature-fluctuating environments. Unlike CuNi10, which excels in thermocouple applications, CuNi44’s balanced combination of formability and resistance stability makes it ideal for high-precision resistors, strain gauges, and current shunts. Its flat cross-section design further enhances heat dissipation and contact uniformity compared to round wires, reducing hot spots in high-current applications.

Standard Designations

Alloy Grade: CuNi44 (Copper-Nickel 44)

UNS Number: C71500

DIN Standard: DIN 17664

ASTM Standard: ASTM B122

Key Features

Superior Resistance Stability: TCR of ±40 ppm/°C (-50°C to 150°C), outperforming CuNi30 (±50 ppm/°C) in precision applications.

High Resistivity: 49 ± 2 μΩ·cm at 20°C, ensuring efficient current control in compact designs.

Flat Profile Benefits: Increased surface area for better heat dissipation; improved contact with substrates in resistor manufacturing.

Excellent Formability: Can be rolled to tight dimensional tolerances (thickness 0.05mm–0.5mm, width 0.2mm–10mm) with consistent mechanical properties.

Corrosion Resistance: Resists atmospheric corrosion and freshwater exposure, suitable for harsh industrial environments.

Technical Specifications

Attribute	Value
Thickness Range	0.05mm – 0.5mm
Width Range	0.2mm – 10mm
Thickness Tolerance	±0.001mm (≤0.1mm); ±0.002mm (>0.1mm)
Width Tolerance	±0.02mm
Aspect Ratio (Width:Thickness)	2:1 – 20:1 (custom ratios available)
Tensile Strength	450 – 550 MPa (annealed)
Elongation	≥20% (annealed)
Hardness (HV)	130 – 170 (annealed); 210 – 260 (half-hard)

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

Product Specifications

Item	Specification
Surface Finish	Bright annealed (Ra ≤0.2μm)
Supply Form	Continuous rolls (50m – 300m) or cut lengths
Packaging	Vacuum-sealed with anti-oxidation paper; plastic spools
Processing Options	Custom slitting, annealing, or insulation coating
Compliance	RoHS, REACH certified; material test reports available

Typical Applications

Precision wirewound resistors and current shunts

Strain gauge grids and load cells

Heating elements in medical devices

EMI shielding in high-frequency circuits

Electrical contacts in automotive sensors

We provide tailored solutions for specific dimensional requirements. Free samples (1m lengths) and comparative performance data with CuNi30/CuNi10 are available upon request.

Company Details

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Business Type:

Manufacturer,Exporter 
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Year Established:

2008 
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Total Annual:

8000000-100000000
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Employee Number:

100~120 
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Ecer Certification：

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Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig... Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig...

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Huona (Shanghai) New Material Co., Ltd.
1900 Mudanjiang Road, Baoshan District, 201999, Shanghai, China
https://www.nicralloy.com/

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