scope:

This International Standard specifies the chemical and mechanical characteristics, the methods of manufacture, the acceptance conditions and the marking of structural steel products with improved atmospheric corrosion resistance. This International Standard applies to plates hot-rolled on reversing mills, having a thickness of 4 mm and over, wide flats, bars, and hot-rolled sections, generally used in the delivery condition and which, as a rule, form part of the bolted, riveted or welded structures in metal constructions1) and which have an improved atmospheric corrosion resistance. This International Standard does not include the following steels, certain of which are covered by other International Standards: - general-purpose structural steels (ISO 630); - steels for boilers and pressure purposes (ISO 9328-2); - steels for heat treatment; - continuously hot-rolled steel sheet of structural quality with improved atmospheric corrosion resistance (ISO 5952); - steel plates for forming and deep drawing.