DIN 17102 standard applies to hot rolled products in the form of flats (plate, strip, wide flats), sections and bars of weldable fine grain stuctural steels exhibitng, in the as delivered condition as specified in subclause minum yield strengths of 255 to 500 n/mm referred to the lowest thickness range as specified.DIN 17102 Standard main steel grade:StE315,EStE285,TStE315,StE355,EStE315,TStE355 and so on.