scope:

This section specifies the requirements for weldable normal strength, high strength and extra high strength hot rolled structural steel plates and sections. These requirements are also applicable to seamless steel pipes intended for structural application.

The requirements are applicable to steel products with a thickness not exceeding 150 mm. For thickness greater than 150 mm, deviations from these requirements may be applied as necessary after special consideration and agreement in each case.

Steels differing from these requirements in chemical composition, deoxidation practice, condition of supply and mechanical properties may be acceptable, provided that they are specially considered and demonstrated to be suitable (e.g. seamless and welded steel pipes produced according to recognised standards).