Extension of E7024 Electrode Applications in Shipbuilding

The primary objective of the project is to determine the extent to which use of AWS type E7O24 electrodes can be broadened in regard to fillet welding applications with particular emphasis on single pass fillet welding. The second objective is to determine the extent to which use of AWS E7O24 type electrodes can be broadened in regard to unlimited use for fillet and butt welding in Grades A, B, D, DS, AH and DH steels. Based on test results several brands of AWS E7024 electrodes exhibited properties that are equal to AWS E6011, E7028, or ABS Grades 2, 2Y electrodes. A class of E7O24 electrodes meeting elongation and Charpy V-notch requirements equivalent to ASS Grades 2 and 2Y could be a realistic consideration in the AWS A5.l Specification. A recommendation is being made to AWS that action be initiated to establish additional classes of E7O24 and E6024 type electrodes with specified elongation and impact properties which would extend their applicability to shipbuilding and other industries.