Nichrome Cr20Ni80 High-Temperature Resistance Wire | 1200°C Rated for Industrial Heating & Corrosive Environments
Description
Nichrome Cr20Ni80 resistance wire delivers unmatched heat resistance (up to 1200°C), superior oxidation protection, and compliance with ASTM/GB standards. Ideal for furnaces, aerospace, and chemical processing.
Product Overview
Nichrome Cr20Ni80 resistance wire is a premium nickel-chromium alloy engineered for extreme thermal and corrosive applications. With 20–23% chromium (Cr) and 75–80% nickel (Ni), this alloy forms a robust chromium oxide (Cr₂O₃) layer at high temperatures, ensuring exceptional resistance to oxidation, sulfidation, and chlorine-induced corrosion. Its optimized electrical resistivity (1.09–1.14 μΩ·m at 20°C) guarantees stable performance in industrial heaters, thermocouples, and semiconductor equipment, even under cyclic heating conditions.
The alloy’s mechanical strength (≥650 MPa tensile strength) and ductility (≥20% elongation) enable seamless fabrication into coils, mesh, and precision components. Compliant with ASTM B603, GB/T 1234-2012, and DIN 17470, Nichrome Cr20Ni80 meets stringent global standards, making it ideal for Middle Eastern oil refineries, Southeast Asian electronics plants, and European aerospace systems. Its high melting point (1400°C) and low thermal expansion coefficient (18×10⁻⁶/°C) ensure reliability in environments ranging from industrial furnaces to household appliances.
Technical Specifications
Chemical Composition
| Element |
Cr (%) |
Ni (%) |
Fe (%) |
Trace Elements (Max %) |
| Content |
20–23 |
75–80 |
≤1.0 |
C: 0.08, Si: 1.6, Mn: 0.6, S: 0.015, P: 0.02 |
Mechanical Properties
| Property |
Value |
| Tensile Strength |
≥650 MPa |
| Elongation (at 20°C) |
≥20% |
| Hardness (HV) |
200–250 |
Physical Parameters
| Parameter |
Value |
| Density |
8.4 g/cm³ |
| Melting Point |
1400°C |
| Resistivity (20°C) |
1.09–1.14 μΩ·m |
| Thermal Conductivity |
15 W/(m·K) |
Standards Compliance
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ASTM B603: Electrical Resistance Alloys
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GB/T 1234-2012: High-Resistance Heating Alloys
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DIN 17470: Material Specifications
Applications
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Industrial Heating: Furnace elements, kiln components, and radiant tubes.
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Aerospace: Sensor wiring and engine components exposed to extreme heat.
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Chemical Processing: Reactor heating systems in H₂S or HCl environments.
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Consumer Appliances: Durable coils for ovens, toasters, and hair dryers.
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Automotive: Glow plugs and exhaust gas sensors.
FAQs
Q1: What is the maximum operating temperature for Nichrome Cr20Ni80?
A: Up to 1200°C in oxidizing atmospheres. For reducing environments (e.g., hydrogen), limit to 1000°C to prevent embrittlement.
Q2: Can Nichrome Cr20Ni80 replace FeCrAl alloys?
A: Yes, in applications requiring superior oxidation resistance and stable resistivity. However, FeCrAl may offer better cost efficiency in non-corrosive settings.
Q3: Is welding feasible for this alloy?
A: Yes, using TIG or laser welding. Post-weld annealing at 800°C restores oxide layer integrity.
3 Product Titles
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Nichrome Cr20Ni80 High-Temp Heating Wire | 1200°C Rated | ASTM & GB Certified
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Cr20Ni80 Nickel-Chromium Alloy Wire for Industrial Furnaces & Aerospace Sensors
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High-Resistivity Nichrome Cr20Ni80 Wire | 20% Chromium, 80% Nickel | DIN 17470 Compliant
Compliance Notes:
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Titles prioritize classification terms (Nichrome Cr20Ni80) and regional certifications (ASTM, GB, DIN).
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