CuNi resistance alloy

Copper-nickel alloy (Cu-Ni), often called white copper in China, is mainly composed of copper and nickel, and contains small amounts of iron and manganese. These alloys offer extremely high strength, excellent corrosion resistance, low resistivity, and good thermoelectric properties. They significantly reduce the temperature coefficient of resistance and have mechanical and physical properties superior to most other copper alloys. CuNi alloy has excellent ductility, high hardness, beautiful appearance, excellent corrosion resistance, and supports deep drawing processing, showing good performance at both normal and high temperatures. In addition, they offer excellent machinability, weldability, and are non-magnetic.

CuNi19

Jiangsu DZX Technology Co., Ltd. specializes in the production of CuNi19 (МН19) copper-nickel alloy. The alloy has excellent corrosion resistance and resistance stability. Provide wire, strip, pipe, plate and other forms, direct sales from manufacturers, global shipping, sufficient stock. Contact: Manager Jiang 19906119641.

Copper-Nickel Alloy

CuNi19

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✓ ISO 9001 Quality
✓ COC & Test Certificates
✓ Established in 2002
✓ OEM & Custom Sizes

Specifications

Plate / Sheet
Thickness: 0.2mm-100mm
Width: 50mm-2000mm
Size: Standard size (e.g. 1000mm×2000mm, 1200mm×2400mm), or customizable
Rod
Diameter: 2mm-250mm
Length: 1m-6m, or customizable
Wire
Diameter: 0.01mm-8mm
Delivery Forms: Bright shiny wire, annealed wire, etc.
Tube
Outer Diameter: 3mm-500mm
Wall Thickness: 0.5mm-50mm
Length: 1m-6m, or customizable
Strip
Thickness: 0.01mm-0.2mm
Width: 5mm-300mm

Chemical Composition

Nickel (Ni): 19
Manganese (Mn): 0.5
Copper (Cu): Rest

Physical & Mechanical Properties

Grade: NC025, CuNi19
Max. Service Temperature (°C): 300
Density (g/cm³): 8.9
Resistivity at 20℃ (μΩ•m): 0.25±5%
Resistance Temperature Coefficient ×10⁻⁶/ºC (20~600ºC): <25
Tensile Strength (Mpa): >340
Elongation at Rupture (%): >25
Melting Point (°C): 1135
Thermoelectric Potential of Copper (μV/℃) (0~100℃): -32

Supply Capability

Item	Details
Lead Time	Samples 5-10 days; production 15-30 days
MOQ	Small trial orders accepted
Samples	Available on request
Packaging	Export-standard coil spools / wooden cases
Certificate	COC with chemical composition analysis
Payment	T/T, L/C

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Project Support

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Real-world qualification for the Marine & Offshore sector: tight tolerances, batch consistency and on-time delivery.

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Frequently Asked Questions (FAQ)

Why is CuNi19 nickel marked in a range of 18-20?

The composition list on the page states nickel 18-20%, iron 0.5%, manganese 0.5%, and copper balance, indicating that nickel is controlled according to intervals rather than a single target value, and the actual composition is controlled within 18% to 20%. Both acceptance and re-inspection are judged based on 18-20%, and the composition bandwidth is wider than that of fixed-point grades.

The ingredient list of CuNi19 lists 0.5% iron separately. What is so special about this in the group?

What are the resistivity and temperature ranges of CuNi19? Suitable for what?

CuNi14, CuNi19, and CuNi23 are all in the 300°C range. How can they be distinguished by resistance value?

The maximum operating temperature of the three is 300°C, and they all add manganese. The difference is in the resistivity range: CuNi14 is about 0.20±5%, CuNi19 is 0.25±5%, and CuNi23 is about 0.30±5%. If you want the middle resistance value, choose CuNi19, choose CuNi14 for the lower value, and CuNi23 for the higher value. Select the nearest resistance value according to the target resistance value of the circuit.

What are the strength and molding data of CuNi19?

The tensile strength is greater than 320MPa, the elongation after break is greater than 25%, the density is 8.9g/cm³, and the melting point is 1145℃. The elongation ensures that cold bending, wire winding, and stamping are feasible. In addition, with good weldability, it can make medium-temperature resistance wires, ribbons, and small structural parts with both strength and processing in mind.

CuNi resistance alloy

CuNi19

Copper-Nickel Alloy

CuNi19

Need this alloy for a demanding application?

Frequently Asked Questions (FAQ)

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