Alumiiniteräkset

Alumiiniteräkset, known in English as aluminum steels, are a class of alloys that combine the properties of aluminum and steel. These materials are not a single defined alloy but rather a category encompassing various compositions where aluminum is added to steel to achieve specific characteristics. The primary purpose of adding aluminum to steel is often to improve its resistance to oxidation and high-temperature corrosion. Aluminum forms a protective oxide layer on the surface of the steel, which can prevent further degradation, especially in environments with high sulfur or oxygen content. This makes them suitable for applications such as heat exchangers, furnace parts, and exhaust systems.

The presence of aluminum can also influence the microstructure of the steel. In some cases, it can help to refine the grain size, leading to improved mechanical properties like strength and toughness. Aluminum can also act as a deoxidizer during the steelmaking process, removing unwanted oxygen and improving the overall quality of the steel. However, excessive amounts of aluminum can negatively impact ductility and weldability. The specific properties and applications of an aluminum steel alloy depend heavily on the precise ratio of aluminum to iron and the presence of other alloying elements like chromium, nickel, or silicon. Research continues to explore new compositions and processing methods for aluminum steels to expand their utility in demanding industrial environments.