What Is ASTM A588 Steel?

A588 is a type of weathering steel that’s renowned for its exceptional corrosion resistance. With its unique ability to form a protective rust-like surface, it eliminates the need for additional coatings, reducing maintenance costs.

ASTM A588 is also referred to as Corten® and covers structural shapes, plate, and bar. This alloy is made up of copper, chromium, nickel, and other elements that give it its weathering resistance properties. It is also known for its high strength, making it an ideal choice for architectural and structural applications including bridges, buildings, and outdoor structures.

The ASTM A588 specification is specifically designed to provide high atmospheric corrosion resistance, making it suitable for outdoor applications where exposure to the elements is a concern.

One of the distinctive characteristics of ASTM A588 steel is its ability to form a protective rust-like surface when exposed to the atmosphere. This natural oxidation process creates a barrier that inhibits further corrosion, thus eliminating the need for additional protective coatings. The weathered appearance of ASTM A588 steel is often considered aesthetically pleasing and is frequently used in architectural applications.

ASTM A588 has a 50ksi minimum yield strength and a 70ksi minimum tensile strength. Weathering steels are not suitable for use in significant load-bearing members above 450 degrees Celsius.

Overall, ASTM A588 is widely used in the construction industry due to its excellent corrosion resistance, high strength, and durable nature, making it suitable for a range of structural applications exposed to harsh environmental conditions.

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