Corten steel, also known as weathering steel, is a type of steel that is designed to develop a protective rust layer when exposed to the weather. This rust layer protects the steel from further corrosion and allows it to have a longer lifespan in outdoor applications compared to traditional steel.https://www.cortenarts.com/fireplaces/freestanding-antique-rusty-corten-steel.html

In terms of weight, Corten steel is typically as dense as other types of steel, ranging from 7.8 to 7.9 grams per cubic centimeter. However, whether Corten steel is considered "heavy" depends on the context and comparison. Compared to some other materials like aluminium or plastic, Corten steel is much heavier. But compared to other types of steel, its weight is similar.
In terms of using Corten steel for heavy-duty applications, it is strong and durable, making it suitable for a wide range of structural and architectural uses, including fire pits or fireplaces. However, the weight of Corten steel should be considered when designing and installing such structures to ensure they are stable and safe to use.
Overall, Corten steel is not inherently "heavy" in terms of density.https://www.cortenarts.com/fireplaces/freestanding-antique-rusty-corten-steel.html