DIN 17102 standard is used for the delivery of Weldable Normalized Fine Grain Structural Steels - Technical Delivery Conditions For Plate, Strip, Wide Flats, Sections And Bars German Institute for Standardisation.DIN 17102 standard main steel grade:EStE500,TStE500,WStE500,StE500,EStE460,TStE460 and so on.