What is mill finish meaning?

Mill finish refers to the finish that is given to metal products after they are extruded, rolled or drawn from raw material. It is the natural appearance of the metal, without any additional treatment or surface finish, such as painting or anodizing. The surface of the metal is typically dull and slightly rough, with visible imperfections such as grain lines and marks from the manufacturing process.

Mill finish is commonly used for aluminum and stainless steel products, including sheets, plates, bars, and tubes. It is often preferred because it is cheaper and easier to produce than a treated finish, and it is suitable for many applications where appearance is not important, such as structural or industrial applications.

Mill finish can also be an important factor in ensuring the quality of the metal. Surface blemishes or scratches that are not visible with a treated finish are easy to detect with a mill finish, making it easier to identify any defects or inconsistencies in the metal.