Corten Steel Grades  are a type of weathering steel that develops a naturally protective rust-like patina over time. The unique appearance of this material makes it a popular choice for architectural and landscaping projects that need to stand up to the elements. While it can be a more expensive option than other structural steels, its durability and low maintenance costs offset the initial investment.

The weathering process that creates this rust layer gives the steel increased strength and resilience, and it requires less upkeep than paint or other coatings. As the metal ages, it takes on a deep reddish brown or bronze color that blends beautifully with other natural materials like wood and stone. This signature look is a desirable aesthetic that architects and designers seek out for their projects.

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While this type of steel offers many benefits, it is not appropriate for all environments. Moisture, oxygen, and pollutants can prevent the formation of this protective patina and lead to ongoing corrosion. Salt exposure, such as from de-icing products or seawater, can also penetrate the surface and accelerate oxidation. If these factors are present, Corten may need to be painted or galvanized immediately to protect the steel.

Navstar Steel can provide Corten plates in a variety of sizes and thicknesses. These weathering steels are manufactured through a specialized heat treatment and can be cut, welded, and fabricated using steel-compatible techniques. These processes ensure that welds are properly preheated and treated to minimize cracking. This type of welding technique is essential to maintain the alloy composition and corrosion resistance of these weathering steels.