scope:

This European Standard specifies the requirements for the surface quality of hot rolled round bars and rods with nominal diameters of 5 mm ≤ dN ≤ 150 mm. By agreement between manufacturer and purchaser, this European Standard may be applied also for squares, hexagons and octagons. This European Standard applies particularly for steels for engineering applications, but may by agreement also be applied for structural steels or tool steels. This European Standard does not include any requirements for the permissible depth of surface decarburization.