FeCrAl (0Cr25Al5)

Key Features:

  • Better high-temperature corrosion resistance than 0Cr21Al6Nb (due to 25% Cr)
  • More cost-effective than Kanthal D and Kanthal AF (no rare earth doping). 
  • Longer lifespan in sulfur-rich environments compared to low-Cr FeCrAl. 
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About FeCrAl (0Cr25Al5)

Heanjia Super Metals Co., Ltd. is leading supplier of FeCrAl wire in China. We adopts the dual electroslag smelting technical route of three-phase lined furnace + electroslag remelting. This offers advantages such as high purity, good uniformity, and long material service life. 

Our Best selling products are: FeCrAl Wire 0Cr25Al5 grade, HJ209(Kanthal A1 substitute) and HJ407(Kanthal APM substitute).They are designed for extreme high-temperature applications, offering superior oxidation resistance, corrosion resistance, and thermal stability compared to standard FeCrAl grades. 

Here below is introduction of our FeCrAl wire 0Cr25Al5 grade. 

  1. Chemical Composition (Weight %)
Element Content (%) Role in the Alloy
Iron (Fe) Balance (~70%) Base material
Chromium (Cr) 25% Enhances oxidation & corrosion resistance
Aluminum (Al) 5% Forms protective Al₂O₃ layer at high temps
Impurities (C, Si, Mn, etc.) <1% Minimized for optimal performance

 Key Features Due to Composition: 

✔ Higher Cr (25%) → Better resistance to sulfur, chlorine, and corrosive gases than lower-Cr FeCrAl alloys. 

✔ 5% Al → Forms a stable Al₂O₃ layer, preventing further oxidation. 

✔ No rare earth elements → More cost-effective than Kanthal APM (Ce-doped) but slightly less creep-resistant. 

  1. Key Properties:
Property Value Notes
Max Operating Temp (Air) 1300°C (2372°F) Lower than 0Cr21Al6Nb (1350°C)
Oxidation Resistance Excellent Better than 0Cr23Al5 due to higher Cr
Electrical Resistivity ~1.45 μΩ·m Suitable for heating elements
Mechanical Strength High Retains strength at high temps
Thermal Shock Resistance Moderate Avoid rapid cooling to prevent cracking

 Advantages Over Other FeCrAl Alloys: 

– Better high-temperature corrosion resistance than 0Cr21Al6Nb (due to 25% Cr). 

– More cost-effective than Kanthal D and Kanthal AF(no rare earth doping). 

– Longer lifespan in sulfur-rich environments compared to low-Cr FeCrAl. 

  1. Applications:

 Industrial Heating 

✔ Electric furnaces (sintering, annealing, brazing at ≤1300°C) 

✔ Industrial kilns (ceramics, glass, metallurgy) 

✔ Heat treatment equipment (carburizing, tempering furnaces) 

 Energy & Chemical Processing 

✔ Resistance heating wires (for high-temp reactors) 

✔ Chlor-alkali industry (corrosion-resistant heaters) 

✔ Petrochemical heaters (sulfur-resistant due to high Cr) 

 Consumer & Specialty Uses 

✔ High-end heating coils (laboratory furnaces, thermocouples) 

✔ Aerospace components (thermal protection systems) 

  1. Comparison with Similar FeCrAl Alloys:
Alloy Grade Cr % Al % Nb % Max Temp (°C) Key Advantage Price
0Cr23Al5 23% 5% — 1300°C Standard industrial grade $8/kg-$20/kg
0Cr25Al5 25% 5% – 1300°C Higher Cr for corrosion resistance $8/kg-$20/kg
0Cr21Al6Nb 21% 6% 0.5-1% 1350°C Best oxidation + creep resistance $18/kg-$28/kg
HJ209(Kanthal A-1 Substitute) 22% 5.8% – 1400°C Premium industrial grade $20/kg-$30/kg
HJ407(Kanthal APM Substitute) 21% 5% 0.02% Ce 1425°C Rare-earth enhanced $28/kg-$50/kg

Our Advantage: 

Currently, only our company in China adopts the dual electroslag smelting technical route of three-phase lined furnace + electroslag remelting. This offers advantages such as high purity, good uniformity, and long material service life. Other companies in the same industry use medium-frequency furnace smelting, which our company phased out long ago. Their process uses a large amount of scrap steel, resulting in relatively lower costs but higher content of harmful impurities, high compositional segregation and non-uniformity, unstable and fluctuating material properties, susceptibility to local melting during use, and short service life cycles.

Through years of technical experimentation, our company has overcome the technical challenge of producing this material in large coil weights. The coil weight has increased from over 20 kg for many years to over 90 kg. We have correspondingly matched integrated production equipment and technology for steel rolling, wire drawing, and heat treatment, which is unique within the domestic industry.

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