# Cr20Ni80 Heating Wire

Cr20Ni80 is a high-nickel NiCr resistance alloy wire designed for stable, long-term operation in industrial high-temperature electric heating systems.

Typical mix is around 80% nickel (Ni) + 20% chrome (Cr), with engineering focus on:

- High nickel → Boosts ductility and creep resistance at heat—great for long continuous heating

- Medium chrome → Builds dense Cr₂O₃ oxide layer for better oxidation resistance and life

- Steady resistance → Nails temp control accuracy and reliable high-heat runs

- Goal isn’t max temp, but long-term stability and reliability when hot.

## Standout Features of Cr20Ni80

- Super steady long-term in 1000–1150°C runs—resistance barely budges, easy to predict life.

- Tough oxidation fight and structure hold: Dense layer sticks strong, rarely flakes even after tons of hot-cold cycles.

- Low creep at heat: High nickel keeps deformation down, cuts break risks big time.

- Easy to work with: Coils, straightens, shapes no sweat—fits all kinds of tubes and frames.

- Batch consistency rocks: Little variation, perfect for big industrial setups.

Cr20Ni80’s big win is high-nickel ductility and low creep—built for non-stop ops, not just peak temps.

## Cr20Ni80 Specs Table

ItemValueAlloy NameCr20Ni80EquivalentNichrome 80/20, Ni80Cr20Common AliasesNichrome Wire 80/20, Ni80Cr20Composition (%)Ni: Bal., Cr: 20–23, Fe: ≤1%Max Temp1200°C (top NiCr)Resistivity (20°C)1.09 μΩ·mDensity8.4 g/cm³Thermal Conductivity60.3 KJ/m·h·°CExpansion Coefficient18×10⁻⁶/°CMelting Point1400°CElongation>20%MicrostructureAusteniticMagneticNon-magneticStandout TraitsTop oxidation, super resistance stability, strongest temp toleranceCommon UsesHigh-temp furnaces, lab gear, ceramic sintering, cutting wires, appliance heatersAvailableDiameters: 0.018–10mm; Strips: 0.02–2mm; Custom tolerances

## Typical Cr20Ni80 Spots

- High-temp industrial furnaces: Wires, strips, meshes for even heat and long reliability.

- Non-stop heating systems (24/7): Steady resistance, low maintenance.

- Precision heat treat gear: Tight control, low drift—keeps products consistent.

- Premium OEM kits: Great for standard long bulk, steady performance.

### Usage Tips & Limits

**Long-term ≤1100–1150°C:** Push higher risks thicker/flaking oxide.

**Match loads to wire size:** Thin + heavy power ages fast or snaps.

**Best oxidizing/neutral air:** Reducing/sulfur/carburizing hurts the layer.

**Leave expansion room:** Tight fixes build stress, break risk.

**Frequent fast hot-cold?** Drop power/temp—shock weakens layer stick.

## Cr20Ni80 Selection Comparison

| Feature | Cr15Ni60 | Cr20Ni30 | Cr20Ni35 | Cr20Ni80 | Cr30Ni70 |
| --- | --- | --- | --- | --- | --- |
| Nickel | Medium | Medium-High | High | Super High | High |
| Chrome | Low | Medium | Medium | Medium | High |
| Oxidation Fight | Solid | Average | Solid | Excellent | Top-Notch |
| High-Temp Strength | Average | Solid | Solid | Very Solid | Rock-Solid |
| Temp Spot | Mid | Mid | Mid-High | High | High |
| Continuous Life | Medium | Medium | Long | Longer | Longest |
| Cost | Medium | Medium | Higher | High | Highest |

For high-temp long stability, low upkeep, reliability over cheap, Cr20Ni80 gives killer high-nickel continuous value—beats pricier high-nickel/chrome options on cost-performance.

## CVSIC Cr20Ni80 Custom Options

- Diameters: Common industrial

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

- Extras: Coiling, shaping, pre-fab components

- Models: Wholesale, OEM, ODM

- Customers: Furnace factories, integrators, engineering firms

Perfect for long bulk and project fits, super batch consistency.

## Quality Control & Consistency

- Precise high-nickel melt/composition

- Resistivity/diameter checks

- High-temp aging/oxidation tests

- Traceable batches for long projects

Cr20Ni80 **[NiCr resistance wire](https://cvsicelement.com/resistance-wire/nicr/)** is the high-nickel continuous champ in NiCr:

- Steady resistance → Spot-on control

- High nickel → Low creep, hot break fight

- Solid chrome → Oxidation resistance, self-healing layer

- B2B custom → Bulk industrial fits

For long stable high-temp non-stop runs and low upkeep, Cr20Ni80 is safe, reliable, and great value.

## FAQs

### Long-term at 1150°C?

Long-term ≤1100–1150°C with smart loads for life/structure.

### Edge over Cr30Ni70?

Higher nickel for better ductility/low creep, but less chrome so slightly weaker oxidation—better cost.

### Good for frequent on-off?

Handles some cycles, but fast hot-cold needs lower power/temp.

### Reducing air?

Nope—H₂/CO/sulfur hurts protection.

### Main uses?

High-temp furnaces, non-stop systems, precision treat, OEM projects.