Fecral heating wire/ iron chromium aluminium alloy Fecral heating wire, also known as iron chromium aluminium alloy, is a type of resistance heating wire made of an alloy of iron, chromium, and aluminum. It is commonly used in heating applications such as electric furnaces, ovens, and heating elements. Fecral heating wire has high resistance to oxidation and corrosion, making it a durable and long-lasting heating element. It also has high electrical resistance, which makes it ideal for use in high-temperature applications.