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.

CuNi23

* Jiangsu DZX Technology Co., Ltd. specializes in production, factory direct sales, Jiangsu delivery, and nationwide delivery.

Copper-Nickel Alloy

CuNi23

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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): 23
Manganese (Mn): 0.5
Copper (Cu): Rest

Physical & Mechanical Properties

Grade: NC030, CuNi23
Max. Service Temperature (°C): 300
Density (g/cm³): 8.9
Resistivity at 20℃ (μΩ•m): 0.30±5%
Resistance Temperature Coefficient ×10⁻⁶/ºC (20~600ºC): <16
Tensile Strength (Mpa): >350
Elongation at Rupture (%): >25
Melting Point (°C): 1150
Thermoelectric Potential of Copper (μV/℃) (0~100℃): -34

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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Frequently Asked Questions (FAQ)

Page title MH23 (CuNi23 / NC030) What does a series of names mean?

MH23 is the name of this group of product lines (MH1~MH44), CuNi23 is the component grade (nickel 23%, manganese 0.5%, copper balance), NC030 is the number based on the 20°C resistivity range – the resistivity on this page is 0.30±5%, and the Russian standard is МН23. Several sets of names refer to the same material, just quote any one when making an inquiry.

The difference between CuNi23 and CuNi30 is only 7% nickel. What is the difference?

What is the strength of CuNi23 at 300℃?

Is CuNi23 suitable for temperatures above or below 300℃? How to leave margin?

The maximum operating temperature mark on the page is 300°C. It is best to design the component surface temperature below 300°C and leave a margin; its melting point is 1150°C, the resistivity is 0.30±5%, and the resistance value is stable within 300°C. It is suitable for medium-temperature electric heating and resistive loads. It is not recommended for long-term overtemperature use.

What is the thermoelectric potential of CuNi23 on copper? What level is it within the group?

The thermoelectric potential of copper at 0~100℃ is -34μV/℃, which is more negative than -28 of CuNi14 and -30μV/℃ of CuNi19, indicating that the higher the nickel content, the stronger the thermoelectric output, and it has entered the range of strong thermoelectric output in the group. When it needs to be paired with copper as a thermoelectric potential reference, it can be estimated as -34μV/℃.

CuNi resistance alloy

CuNi23

Copper-Nickel Alloy

CuNi23

Need this alloy for a demanding application?

Frequently Asked Questions (FAQ)

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