0.05mm 0.10mm Ultra Thin Nichrome 80 Alloy Cr20Ni80 Heating
Resistance Flat Strip In Coils
Nichrome Cr20Ni80 is a nickel-chromium-based alloy resistance strip
that is commonly used in a variety of heating and sensing
applications. The alloy composition consists of approximately 20%
chromium and 80% nickel, with the remaining percentage being
primarily iron and other minor alloying elements.
The main advantages of the Nichrome CR20Ni80 resistance strip are:
1. Extremely High Electrical Resistivity:
The CR20Ni80 alloy has an exceptionally high electrical
resistivity, typically in the range of 1.08-1.13 ohm-mm²/m.
This high resistivity makes the strip well-suited for applications
requiring high-resistance heating and sensing elements, as it can
achieve the desired resistance with a smaller cross-sectional area.
2. Outstanding Oxidation Resistance:
The high chromium content (around 20%) provides excellent oxidation
resistance to the alloy.
This allows the CR20Ni80 strip to operate at extremely high
temperatures, often exceeding 1200°C, without significant
degradation or oxidation.
The superior oxidation resistance is crucial for applications where
the strip is exposed to high-temperature environments for extended
periods.
3. Excellent High-Temperature Strength:
The combination of chromium and nickel in the alloy composition
gives the CR20Ni80 strip exceptional high-temperature strength and
creep resistance.
This property enables the use of the strip in applications that
require sustained exposure to extreme heat, such as industrial
furnaces and kilns.
4. Superb Corrosion Resistance:
The high nickel content (around 80%) contributes to the alloy's
superior corrosion resistance.
This makes the CR20Ni80 strip suitable for use in highly corrosive
environments, where it can withstand chemical attacks and maintain
its integrity.
5. Good Ductility:
The nickel-rich composition of the CR20Ni80 alloy provides a good
balance of ductility and strength.
This allows the strip to be formed, shaped, and fabricated into
various configurations as required by the application.
| Performance material | Cr10Ni90 | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 |
| Composición | Ni | 90 | Rest | Rest | 55.0～61.0 | 34.0～37.0 | 30.0～34.0 |
| Cr | 10 | 20.0～23.0 | 28.0～31.0 | 15.0～18.0 | 18.0～21.0 | 18.0～21.0 |
| Fe | － | ≤1.0 | ≤1.0 | Rest | Rest | Rest |
| Max. temperature( °C ) | 1300 | 1200 | 1250 | 1150 | 1100 | 1100 |
| Melting Point ℃ | 1400 | 1400 | 1380 | 1390 | 1390 | 1390 |
| Density(g/cm3) | 8.7 | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 |
| Resistivity at 20ºC(μΩ@m) | 0.76±0.05 | 1.09±0.05 | 1.18±0.05 | 1.12±0.05 | 1.00±0.05 | 1.04±0.05 |
| Elongation at rupture(%) | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 |
| Specific Heat J/g.℃ | － | 0.44 | 0.461 | 0.494 | 0.5 | 0.5 |
| Thermal conductivity KJ/m.h℃ | － | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 |
| Coefficient of lines expansion a×10-6/(20～1000℃) | － | 18 | 17 | 17 | 19 | 19 |
| Micrographic structure | － | Austenite | Austenite | Austenite | Austenite | Austenite |
| Magnetic properties | － | Nonmagnetic | Nonmagnetic | Nonmagnetic | Weak magnetic | Weak magnetic |
