... : ABS.CCS.GL,BV,NK,KR,LR etc Instruction: HXJ422 is carbon electrode with calcium titanate type coating,excellent welding process ... arc,beautiful welding,little spatter and can be used with AC/DC, used for comprehensive welding. Use:Used for welding steel structure ... -20°C 4603703160 X radiographic requirements: Grade 2 Reference current:(AC or DC+) Electrode diameter(mm)φ2.5φ3.2φ4.0φ5 ...