DIN SPEC 1116
DIN SPEC 1116 Welding - Grouping systems for materials - American materials (ISO/TR 20173:2009); German version CEN ISO/TR 20173:2009
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2010
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2010