# CuNi44 Alloy Wire

CuNi44 is a NiCu alloy wire built for stable medium-to-high temp industrial electric heating jobs like ovens, heat treat equipment, and non-stop furnaces.

## Standout Features of CuNi44 (Constantan)

CuNi44 is the “stability ceiling” beast in the NiCu lineup.

- Nickel around 44%

- High and rock-steady resistivity (≈ 0.49–0.52 μΩ·m)

- **Near-zero temp coefficient**—resistance barely moves with heat.

- **Stable thermoelectric stuff**—huge for thermocouple compensation and precision resistors.

- Not chasing “hotter temps,” but “dead reliable”

## CuNi44 (NC050) Specs Table (Constantan Type)

ItemValueAlloy NameCuNi44 (NC050)AliasConstantanComposition (%)Ni ≈44, Mn: 1%, Cu Bal.Max Continuous Temp500°CMelting Point (approx.)1280°CDensity8.9 g/cm³Resistivity (20°C)0.50 μΩ·m ±5%Tensile Strength≥420 MPaElongation≥25%TCR (20–600°C)< -6×10⁻⁶/°C (near-zero drift)Standout TraitsClassic Constantan, super low drift, high stability, oxidation toughCommon UsesPrecision resistors, strain gauges, bridges, instrument standardsAvailableFine wire, strip, ultra-thin foil

## CuNi44 Spots

- Industrial furnaces/ovens: Medium-high temp heating—even control

- Non-stop high-temp heating: High-nickel → Stable oxidation, long reliability

- Precision heat treat gear: 450–500°C processes—steady resistance/uniform heat

- Premium OEM fits: Custom coils/pre-fab parts—into high-temp systems

### Usage Tips & Limits

**Long-term ≤500°C**

- Pricey, but performance super “obedient”

- Fits systems needing extreme stability

## CuNi44 Selection Comparison

| Grade | Ni% | Cu% | Resistivity | Oxidation | High-Temp Strength | Life | Cost | Quick Take |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| CuNi2 | 2 | 98 | 0.435–0.45 | Solid | Medium | Medium-Long | Low–Medium | Low power low-temp steady → Budget pick |
| CuNi6 | 6 | 94 | 0.45–0.48 | Solid | Medium-High | Medium-Long | Medium | Medium nickel → Reliable medium-temp non-stop |
| CuNi10 | 10 | 90 | 0.48–0.52 | Solid | Medium-High | Medium-Long | Medium-High | High nickel → Reliable medium-high temp non-stop |
| CuNi23 | 23 | 77 | 0.52–0.55 | Solid | High | Medium-Long | Medium-High | High nickel → Best medium-high precision non-stop |
| CuNi30 | 30 | 70 | 0.55–0.58 | Solid | High | Medium-Long | Medium-High | High nickel → Optimal medium-high sustained runs |
| CuNi34 | 34 | 66 | 0.57–0.60 | Solid | High | Medium-Long | Medium-High | High nickel → Best high-temp precision industrial non-stop |
| CuNi44 | 44 | 56 | 0.60–0.65 | Solid | High | Medium-Long | Medium-High | High nickel → Top high-temp continuous/precision heat treat, long-life industrial |

Quotable engineering conclusion: CuNi44 properties → High nickel → High-temp precision non-stop heating long stability → Top engineering reliability

## CVSIC CuNi44 Custom Options

- Diameters: 0.05–2 mm, custom

- Forms: Coils, straight, cut-to-length

- Extras: Coil winding, shaping, pre-fab components

- Models: Wholesale, OEM, ODM

- Customers: Industrial makers, heat treat firms, system integrators

- Tip: Great for long bulk—steady wire/dimensions

### Quality & Consistency

- Strict Ni/Cu ratio for resistance/oxidation

- 100% batch resistivity/size checks

- Simulated long-run aging/oxidation—drift < ±3%

- Traceable spools for bulk control

## Wrap-Up

CuNi44 high-nickel copper-base **[NiCu alloy wire](https://cvsicelement.com/resistance-wire/cuni/)** brings high resistivity, excellent oxidation resistance, high-temp long stability, and low magnetism—spot-on for high-temp industrial electric heating systems, ovens, and precision heat treat gear.

- Properties → Results: High nickel → Reliable high-temp non-stop → Steady resistance, longer life

- Pick tip: CuNi44 for long-term high-temp non-stop; CuNi23/CuNi30/CuNi34 medium-high; CuNi2/CuNi6/CuNi10 medium/low budget

- B2B bulk/OEM/ODM custom—easy for engineers/procurement calls.

## FAQs

### Max long-term temp for CuNi44?

Air long-term 450–500°C, short 550–600°C—high nickel keeps it steady.

### Vs CuNi34—why pick?

CuNi44 → Higher nickel → Better higher temp continuous, fits long-term high-temp industrial treat; CuNi34 → Medium-high precision non-stop, bit cheaper.

### Thermal cycles hit CuNi44?

High nickel handles tons—steady structure, low drift.

### OEM custom CuNi44 parts—what?

Coil winding, shaping, pre-fab—into high-temp industrial systems direct.

### Big volume CuNi44 long projects?

Batch trace, composition/resistance checks—long-term bulk consistent.

### Precision heat treat gear?

Super low magnetism—even/steady control, perfect for precision non-stop.