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NiCr 8020 Resistance Wire Cr20Ni80 for Industrial Heating Systems
Cr20Ni80 (NiCr 8020) resistance wire, also known as Nichrome 80/20, is a premium nickel-chromium alloy engineered for superior electrical resistance and exceptional performance in high-temperature environments. With an 80% nickel and 20% chromium composition, this oxidation-resistant heating wire delivers stable resistivity, outstanding durability, and reliable operation up to 1200°C (2200°F).
- Overview
- Specification
- Applications
- FAQs
- Recommended Products
- Exceptional High-Temperature Resistance: Continuous operation up to 1200°C (2200°F) with a melting point around 1400°C (2550°F), perfect for industrial furnace heating elements.
- Outstanding Oxidation and Corrosion Resistance: Forms a self-protecting oxide layer for prolonged durability in harsh environments.
- Stable Electrical Resistivity: Approximately 1.08–1.10 μΩ·m at 20°C, delivering consistent heating performance across temperature fluctuations.
- High Mechanical Strength: Excellent tensile strength and ductility for easy forming into coils, spirals, or custom shapes.
- Non-Magnetic and Versatile: Suitable for applications where magnetic interference must be avoided.
- Energy Efficiency: High resistivity allows for compact designs and efficient power usage in resistance heating systems.
Overview of NiCr 8020 Resistance Wire:
Our NiCr 8020 resistance wire (Cr20Ni80) is a versatile electric resistance heating wire designed for long-lasting performance in industrial heating systems. The alloy forms a protective chromium oxide layer that enhances oxidation resistance, ensuring extended service life even in continuous high-heat operations.
Available in various diameters and forms (round wire, coils, or strips), this high resistivity nichrome wire maintains stable performance with minimal degradation. It offers excellent weldability, non-magnetic properties in many applications, and proven reliability in both domestic and heavy industrial settings.
Features of NiCr 8020 Resistance Heating Wire:
These features make NiCr 8020 one of the most reliable nichrome heating wires available for professional use.
| Performance material | Cr10Ni90 | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 | |
|---|---|---|---|---|---|---|---|
| composition | 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 | |
| Maximum temperature℃ | 1300 | 1200 | 1250 | 1150 | 1100 | 1100 | |
| Meltiing point ℃ | 1400 | 1400 | 1380 | 1390 | 1390 | 1390 | |
| Density(g/cm3) | 8.7 | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 | |
| Resistivity | -- | 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 | -- | 18 | 17 | 17 | 19 | 19 | |
| Micrographic structure | -- | Austenite | Austenite | Austenite | Austenite | Austenite | |
| Magnetic properties | -- | Nonmagnetic | Nonmagnetic | Nonmagnetic | Nonmagnetic | Nonmagnetic |
Applications of Premium NiCr 8020 Nichrome Wire:
This nichrome 80/20 resistance wire excels in a wide range of heating applications:
- Industrial Furnaces and Kilns: Primary heating elements for high-temperature processing.
- Electric Heaters and Ovens: Used in duct heaters, air heaters, and process heating equipment.
- Plastic Molding and Hot Cutting: Reliable performance in injection molding machines and thermal cutting tools.
- Resistors and Control Systems: Precision wire-wound resistors and braking resistors.
- Domestic and Commercial Appliances: Toasters, hair dryers, soldering irons, and water heaters.
- Specialized Equipment: Mesh belts, conveyor systems, and laboratory heating apparatus.
FAQ on NiCr Resistance Wire Cr20Ni80:
Q: What is the maximum operating temperature for NiCr 8020 nichrome wire?
A: It supports continuous use up to 1200°C (2200°F) in typical industrial heating element applications.
Q: How does Cr20Ni80 compare to other resistance alloys?
A: NiCr 8020 offers superior oxidation resistance and lifespan compared to iron-chromium-aluminum (FeCrAl) alloys in many oxidizing atmospheres, with more stable resistivity.
Q: Is this wire suitable for custom coil forming?
A: Yes, its excellent ductility and strength make it easy to wind into coils, spirals, or complex shapes for custom heating elements.
Q: What diameters are available?
A: We supply a full range from fine gauges (e.g., 0.1mm) to thicker wires for high-power industrial systems. Contact us for custom specifications.
Q: Does Nichrome 80/20 resist corrosion effectively?
A: Absolutely — the chromium content creates a protective oxide layer, providing excellent corrosion and oxidation resistance at elevated temperatures.
