Experimental studies on impact strength of weld metal of arc welding electrode for reactor pressure vessel

The experimental studies were carried out on the influences of Mn and Si contents upon the impact strength of MnSi lime basis type weld metal in order to manufacture the arc welding electrode for the welding of the reactor pressure vessel of the Advanced Calder Hall type. The test results showed that it was possible to obtain the MnSi lime basis type weld metal with high impact strength by increasing the Mn content of weld metal in welding of heavy thick plate.