Variation of Tensile Strength of Welds with Welding Current for Different Electrodes in Shielded Metal Arc Welding Process

Abstract

Tensile strength of structural members is very important for any industry. In several operations the joining of materials is the essential. The shielded metal arc welding process is a very important  arc welding processe. The tensile strength of any structural member is  important in several cases where the bending and twisting types of loading is involved. In the present work the investigation of the effect of three different types of electrodes at three different welding currents in shielded metal arc welding process, utilizing Low Carbon Steel plate of API 5L Grade X 52, was done for tensile strength. The three different electrodes as E 6013, E 7016 and E 7018 and the varying currents as 90 A, 100 A and 110 A. Total 18 pieces were used to obtain 9 different welds which were used to analyze the effect of current and the electrode on tensile strength. The dimensions of the work pieces were taken as 150 mm x 50 mm x 10 mm. The values of tensile strength in each weld were written in a table and respective diagrams were drawn to make clear the effect of welding current on tensile strength for the three different electrodes. It was found that tensile strength of weld decreased with increase of current for all the three types of electrodes.