The improvements of materials used in aircraft gas turbine engines which constitute 50% of total aircraft weight must protect its actuality continuously. Utilization of super alloys in aerospace and defense industries can not be ignored because of excellent corrosion and oxidation resistance, high strength and long creep life at elevated temperatures. The newly innovated ALLVAC 718 Plus superalloy which is the last version of Inconel 718 has been proceeding in the way to become a material that aerospace and defense industries never replace of any other material with combining its good mechanical properties, easy machinability and low cost. In spite of their superior properties, these materials suffer from wear, tear and crack in order to be exposed to the elevated working temperatures in service. Therefore EBW varestraint test is designed to investigate the hot cracking susceptibility of Electron beam welded ALLVAC 718 plus. © 2012 American Scientific Publishers. All rights reserved.