Welding electrodee7018 is a low-hydrogen iron powder type electrode that produces high quality x-ray welds. It can be used in all positions on ac or dc reverse polarity welding current. E7018 is recommended for welding medium grade carbon steels, where no preheat is used, and on cold rolled steels normally exhibiting excessive porosity when welded with conventional electrodes. Typical applications: Low-alloy structures Low, medium, and high-carbon steels Offshore rigs and power plants Steel structures Tack welds for tubular wire applications Aws specification: aws a5.1 Aws classification: e7018 Welding current: ac íºc dc en (electrode negative) Typical wire chemistry: C: 0.071 Mn: 1.42 Si: 0.53 P: 0.014 Typical mechanical properties: Yield strength, mpa: ¡Ý420 Tensile strength, mpa: ¡Ý510 % elongation: 30 Welding positions: all positions Available diameters: 2.5mm, 3.2mm, 4.0mm & 5.0mm Available packing: small box and carton box