Dissimilar metal joining spot welding methods types of resistance have been carried out. Spot welding requires emphasis of this type of welding on both sides of the material to be joined, so that this will result in a former welding on two sides of the material that has been welded. Splicing type of spot welding method TIG expected to cover this shortfall. This study aims to determine the effect of variations in the time of welding to microstructure, hardness and tensile load capacity in connection capacity with different material TIG spot methods. The material used in this study is a low carbon steel plate and aluminum plate 1100 with a thickness of 0.8 mm with a length of 10 cm and a width of 3 cm. This type of connection used type of overlap with the position of the top low-carbon steel. The welding process using the current 100 A. The parameters used time is 5 seconds, 6 seconds, 7 seconds and 8 seconds. Tests conducted in this study is a metallographic testing, hardness testing and tensile testing. Based on the research that has been done, the weld metal of low carbon steel structure changes become more coarse and the weld metal aluminum indicates the formation of structure columnar dendritic and equiaxed dendritic, The highest hardness values of weld joint areas are on the variation within 7 seconds of166.3 ± HV that is on the low carbon steel weld metal, While the value of the highest tensile strength at the time variation of 8 seconds at 552.46 N. From the research that has been done the effect of press time while welding is very influential on the value of tensile load, microstructure and hardness. Welding time 8 seconds is recommended for TIG spot welding of low carbon steel material with aluminum.