How to Select the Right Corten Steel Sheet for Your Next Project

Corten steel is a popular material among designers and architects due to its ability to develop a rust-like appearance over time. This characteristic makes it an excellent choice for exterior applications, as it can blend seamlessly with nature. But, selecting the right corten steel sheet for your next project can be tricky. With so many options available, it’s important to consider various factors before deciding. In this expert guide, we’ll explore the key factors you need to know to choose the right corten steel sheet for your next project.

What is Corten Steel Sheet?

Corten steel sheet, also known as weathering steel, is a type of alloy rounded bars made from high-strength low-alloy structural steel. It comes in different shapes, such as round, forged, hollow, and hexagonal bars. Due to its high tensile strength and corrosion-resistant properties, it is widely used for shipbuilding and various engineering components exposed to severe environments or where the structure needs to be more durable. Furthermore, Corten Steel Sheets provide excellent resistance against atmospheric corrosion when used for bridges and other buildings due to the rust-like appearance that makes them aesthetically pleasing while providing excellent long-term protection from harsh environmental conditions.

Advantages of using Corten Steel Sheet


Corten steel sheet is an alloy of steel and chromium that is extremely durable. It has a much higher resistance to corrosion than traditional steel, making it the ideal choice for outdoor applications. The alloying process creates a layer of rust on the surface of the steel that acts as a protective barrier, preventing further corrosion. Additionally, Corten steel sheet does not require any painting or other treatments to maintain its durability.

Low Maintenance

Corten steel sheet also requires very little maintenance once it has been installed. The protective layer of rust prevents additional corrosion, so there is no need to paint or treat the material to keep it looking good. Corten steel sheets can be easily cleaned with soap and water if necessary.

Aesthetic Appeal

Corten steel sheet has an attractive reddish-brown color, making it aesthetically appealing for many applications. This color is created by the oxidation process that occurs when the alloy is exposed to moisture and oxygen in the air, creating a unique look that cannot be replicated with traditional paints or coatings.


Corten steel sheet is also a very cost-effective material when compared to other types of metals, such as stainless steel or aluminium. This makes it ideal for projects where budget may be an issue, as it provides an affordable solution without sacrificing quality or durability. Additionally, Corten steel sheet does not require additional treatments such as painting or coating to maintain its appearance over time.


Finally, Corten steel sheet can be used in various applications due to its versatility and strength. It can be used for roofing materials, cladding panels, sculptures and even furniture due to its strength, durability and attractive aesthetic appeal.

Select the Right Corten Steel Sheet for your Project

Know Your Application

Before you select a corten steel sheet, it’s essential to determine the application and use it correctly. With so many variations available, selecting the wrong type for an application can lead to costly issues in the future. If you’re using corten steel for an exterior application, ensure the type you choose is designed for outdoor use. Similarly, if you want to use corten steel indoors, choose one that features properties more suitable for interior use.

Consider the Thickness

Another essential consideration when selecting a corten steel sheet is the thickness. Generally, corten steel comes in various thicknesses, with the most common options ranging between three and five millimetres. Thicker corten steel sheets offer improved durability but can also be challenging to handle. Thinner options, on the other hand, are easier to work with and relatively cost-efficient.

Decide on the Finish

Corten steel is known for its unique, rust-like appearance, which makes it a popular choice for architectural designs. Still, the finish can vary depending on the type of corten steel you choose. For instance, choose a sheet with a clear-coat finish if you want a more uniform rust appearance. On the other hand, if you want more variation in the rust, opt for one without a clear coat.

Evaluate the Cost

Corten steel, in general, is a premium building material, so it’s essential to consider the cost of the sheets when making your selection. The cost can vary depending on the corten steel sheet’s thickness, size, and finish. Generally, thicker corten steel sheets with no additional finishes are the most affordable. However, the cost will increase if you’re looking for a more customisable finish or unique appearance.

Choose a Reputable Supplier

Finally, when selecting corten steel sheets, working with a reputable supplier is essential. They should be able to provide you with the right guidance and make recommendations based on your project requirements. Additionally, they should have a broad range of corten steel sheets available to select from and provide excellent after-sale services like delivering your order on time.


Choosing the right Corten steel sheet for your next project can be daunting. By considering factors such as your application, thickness, finish, cost, and supplier, you can streamline the selection process and choose the right sheet to fit your needs. So, whether you’re using corten steel for an exterior façade, a structural beam, or an interior feature wall, this expert guide has given you the knowledge to make an informed decision.

How to Select the Right Corten Steel Sheet for Your Next Project

by Conquest Steel & Alloys time to read: 4 min