Aluchrom O® - Resistance Alloy Wire - Material Information

Aluchrom O® is a high-performance iron-chromium-aluminum (FeCrAl) resistance alloy widely utilized in high-temperature environments. Its outstanding oxidation resistance and electrical resistivity make it an ideal material for heating elements and thermal applications, especially where longevity and stability under thermal cycling are critical.

Material Overview

Aluchrom O® comprises approximately 70% iron (Fe), 25% chromium (Cr), and 5% aluminum (Al). This precise alloying facilitates the formation of a dense and adherent ?-Al₂O₃ (alumina) scale on the surface when exposed to elevated temperatures, which significantly enhances its oxidation resistance. Advanced structural studies show that Cr diffusion into alumina layers contributes to the stabilization of mixed oxide phases, such as (Al_xCr_1–x)₂O₃, promoting superior protective characteristics [(Wang et al., 2020)]. The microstructure generally consists of a B2-type cubic phase with uniform grain sizes, providing thermal stability and mechanical strength at temperatures up to 1200 °C [(Zhang et al., 2021)].

Applications and Advantages

Aluchrom O® is predominantly used in industrial and consumer heating applications, including furnace elements, toasters, kilns, and laboratory heating equipment. The material retains mechanical integrity and oxidation resistance even after prolonged exposure to harsh atmospheres. Notably, its alumina scale resists spalling and minimizes surface degradation, extending component lifespan. Experimental studies highlight its improved performance over traditional stainless steels, especially under oxidizing conditions and thermal cycling [(Niu, 2007); (Xie et al., 2024)].

Goodfellow Availability

Goodfellow offers Aluchrom O® in research-ready formats, with the flexibility to meet specific dimensional requirements. It is available for direct order through our online catalogue, supporting both academic and industrial R&D projects.

Explore Aluchrom O® - Resistance Alloy (Fe70/Cr25/Al5) - Wire - Material Information and other advanced materials in Goodfellow’s online catalogue: Goodfellow product finder.

References

• Wang, J., Liu, S., Bai, X., Zhou, X., & Han, X. (2020). Oxidation behavior of Fe–Al–Cr alloy at high temperature: Experiment and a first principle study. *Vacuum*, 177, 109144.
• Zhang, W., Qian, Y., Sun, R., Lin, X., & Yao, M. (2021). Oxidation characteristics of Fe22Cr5Al3Mo–xNb alloys in high temperature steam. *Corrosion Science*, 192, 109722.
• Niu, Y. (2007). Initial stage oxidation of Fe-Al and Fe-Cr-Al alloys at high temperature. *Research on Iron and Steel*, 35(1), 45–49.
• Xie, J., Ma, X., & Kuang, W. (2024). Improving the corrosion resistance of FeCrAl alloy in high temperature hydrogenated water through gaseous pre-oxidation. *Corrosion Communications*, 7(1), 100001.
• Shin, K. S. (2014). Iron-chromium-aluminum alloy showing durability and corrosion resistance in high temperature. *Patent Publication*, US20140299387A1.