This standard applies to hot rolled finished products (sheets, large plates and profiles) with a nominal thickness greater than or equal to 15 mm, stressed in the thickness direction and intended to be used in welded structures. 2 For products less than 15 mm thick, arrangements must be made when ordering.
UNI 7957-1979 history
1979UNI 7957-1979 Mechanical tests of ferrous materials. Ductility control by means of through thickness tensile testing.