Designation for fine grain steel structural hollow sections

For fine grain steel structural hollow sections the steel designation consists of:

– the number of the European Standard;

– the letter S for structural steel;

– the indication of the minimum specified yield strength for thicknesses ≤ 16 mm expressed in w MPa (1 MPa = 1 N/mm2)

– the letter N to indicate normalized or normalized rolled feedstock material;

– the letter L for the qualities with specified impact properties at -50°C;

– the letter to indicate hollow section.