This research is a study of the performance of the arm machine to work covered electrode welding gas AWS A type 5.18 ER S 70-6. Upgrade to steel and steel grade 400 SS S C 45 intended to study the results from the use of the work of welding current and potential difference which is the movement of the head connecting factors in the trialsteel plate size 15 X 10 cm 6 mm thick welding welding is a welding head, will be perpendicular to the sheet of metal
The trial of physical pieces of digital microscope to show the comparison of welding current and the different pieces of skin welding30 centimeters per minute and an electric potential difference of 20 volts, the steel plates with a thickness of two equal force is 6 millimeters, electrical current is changed from 90 to 200 ampere found that welding steel grade 400 SS90 - 160 ampere and steel grade 45 S C electricity from 90 - 200 ampere is the regular size of the welding of the weld metal, penetrates deep into the results of the trial will be evident that the digital microscope melt welding of steel grades with 45 S C400 SS osteoporosis since the footprints found at least that