This research will use gray cast iron as a welding specimen using SMAW. Before being welded, the specimen was made of a single V seam. The electrode used was ENi-Cl. Cast iron is a mixture of iron and carbon. The carbon content is between 2.0-6.67%. The Dye Penetrant test showed that there were several defects in the welding results, namely porosity, spatter, and crack. The macro structure test…