# CuNi34 Alloy Wire

CuNi34 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 CuNi34

CuNi34 is a super mature, “engineering-friendly” high-stability model in the NiCu lineup.

- Nickel around 34%

- High and steady resistivity

- Good thermal cycling adaptability

CuNi34 isn’t chasing extreme temps—it’s all about extreme stability.

## CuNi34 (NC040) Specs Table

| Item | Value |
| --- | --- |
| Alloy Name | CuNi34 (NC040) |
| Composition (%) | Ni ≈34, Mn: 1%, Cu Bal. |
| Max Continuous Temp | 500°C |
| Melting Point (approx.) | 1180°C |
| Density | 8.9 g/cm³ |
| Resistivity (20°C) | 0.40 μΩ·m ±5% |
| Tensile Strength | ≥400 MPa |
| Elongation | ≥25% |
| TCR (20–600°C) | ≈0 |
| Standout Traits | Near-zero drift (ZTC), long-term steady |
| Common Uses | Standard resistors, precision measure, lab instruments |
| Available | Wire, strip, ultra-thin foil |

## CuNi34 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 medium-high temp systems

## Usage Tips & Limits

**Long-term ≤500°C**

- Killer for premium OEM, long projects

- Use it to “have fewer issues”

## CuNi34 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 medium-high precision industrial non-stop, great for high-temp long runs |

## CVSIC CuNi34 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

CuNi34 high-nickel copper-base **[NiCu alloy wire](https://cvsicelement.com/resistance-wire/cuni/)** brings high resistivity, excellent oxidation resistance, medium-high temp long stability, and low magnetism—spot-on for medium-high temp industrial electric heating systems, ovens, and precision heat treat gear.

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

- Pick tip: CuNi34 for precision medium-high temp non-stop; CuNi10/CuNi23 medium; CuNi2/CuNi6 low-temp budget

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

## FAQs

### Max long-term temp for CuNi34?

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

### Vs CuNi30—why pick?

CuNi34 → Higher nickel → Better higher temp continuous, fits precision industrial; CuNi30 → Medium-high precision non-stop, bit cheaper.

### Thermal cycles hit CuNi34?

High nickel handles tons—steady structure, low drift.

### OEM custom CuNi34 parts—what?

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

### Big volume CuNi34 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.