Welding is often used in industry as a joining technique, one of which Micro Resistance Spot (MRSW). MRSW was carried out to know the maximum load and shear stress produced on separate worksheets using AISI 304 aluminum alloys then connected lap joint. This study uses weld current, time, emphasis electrodes. In this, welding done constantly does not use cooling. The currents are 140, 280, 420 A...