E4043 DC aluminum "aluminarc" specialty welding electrodes are the highest strength alloy for arc and torch welding of low alloy aluminum. Excellent for cast, wrought and extruded aluminum in all positions. Can also be used as a torch brazing alloy. Typical applications include truck beds, loading ramps and docks, banisters, stairs, diamond plate, irrigation piping, engine blocks, transmission housings and railroad frogs. Recommended Polarity: DC Reverse. Diameter (Inches): 1/8", Weight Lbs. (Kg): .5 (.22) Tensile Strength (PSI): 34,000 Amperage: 70-120.