1.1 This International Standard specifies the qualities of general purpose steel set out in table 1 intended for engineering purposes. 1.2 This International Standard applies to hot-rolled steel sheet 3 mm or more thick, flats and bars generally used in the delivered state and as a rule in engineering structures. It does not deal with the following steels, which are dealt with in other International Standards : — steels for boilers and pressure vessels (ISO 2604/4); — sheet for forming and stamping (ISO 3573 and ISO 3574); — structural steels for heat treatment; — bars for concrete; — general-purpose steels intended for metal construc-tions (ISO 630).