FeCrAl 0Cr21Al6Nb High Temperature Resistance Wire Corrosion Resistant For Industrial Heating
FeCrAl 0Cr21Al6Nb High-Temperature Resistance Wire | Corrosion-Resistant Alloy for Industrial Heating
Description
FeCrAl 0Cr21Al6Nb resistance wire combines exceptional heat resistance (up to 1300°C) with enhanced corrosion protection. Ideal for chemical processing, power generation, and aerospace applications.
Product Overview
FeCrAl 0Cr21Al6Nb resistance wire is a niobium-enhanced iron-chromium-aluminum alloy designed for extreme thermal and corrosive environments. With 21% chromium (Cr), 6% aluminum (Al), and 0.5-1.2% niobium (Nb), this advanced alloy forms a dense, self-healing alumina (Al₂O₃) oxide layer under high temperatures, delivering unmatched resistance to oxidation, sulfidation, and chlorine-induced degradation. The addition of niobium enhances grain stability and creep resistance, enabling prolonged operation at 1300°C in oxidizing atmospheres and up to 1100°C in reducing environments, such as hydrogen-rich or carburizing conditions.
Its optimized electrical resistivity (1.38 μΩ·m at 20°C) ensures consistent performance in industrial heaters, thermocouples, and semiconductor manufacturing equipment. Compliant with ASTM B603, DIN 17472, and JIS C2530, the alloy’s mechanical properties—including a tensile strength of 650-750 MPa and elongation of ≥18%—support rigorous fabrication into coils, mesh, and precision components. Engineered for global adaptability, FeCrAl 0Cr21Al6Nb meets the demands of Middle Eastern refineries, Southeast Asian electronics plants, and European renewable energy systems, offering superior lifecycle cost efficiency.
Technical Specifications
Chemical Composition
| Element | Cr (%) | Al (%) | Nb (%) | Fe (%) | Trace Elements (Max %) |
|---|---|---|---|---|---|
| Content | 20-22 | 5.5-6.5 | 0.8-1.2 | Balance | C: 0.05, Si: 0.4, Mn: 0.3 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 650-750 MPa |
| Elongation (at 20°C) | ≥18% |
| Hardness (HV) | 230-260 |
Physical Parameters
| Parameter | Value |
|---|---|
| Density | 7.2 g/cm³ |
| Melting Point | 1520°C |
| Resistivity (20°C) | 1.38 μΩ·m |
Standards Compliance
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ASTM B603: Rolled Electrical Alloys
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DIN 17472: High-Temperature Material Specifications
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JIS C2530: Japanese Resistance Alloy Standards
Applications
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Chemical Processing: Heating elements in acid baths, chlorine reactors, and sulfur recovery units.
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Power Generation: Boiler components, nuclear reactor sensors, and geothermal heating systems.
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Aerospace: High-stress wiring for jet engine sensors and avionics.
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Automotive: Durable glow plugs and exhaust gas sensors for emission control.
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Electronics: Precision heating coils in semiconductor deposition systems.
FAQs
Q1: How does niobium improve FeCrAl 0Cr21Al6Nb’s performance?
A: Niobium enhances high-temperature strength, reduces grain growth, and improves resistance to thermal fatigue, ideal for cyclic heating applications.
Q2: What environments should be avoided with this alloy?
A: Avoid prolonged exposure to fluorine or alkaline melts, which can degrade the protective oxide layer.
Q3: Is this wire suitable for vacuum furnace applications?
A: Yes, it performs well in vacuum or inert atmospheres up to 1300°C due to its stable alumina layer.
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