Used to weld low carbon structure & low alloy steelstructure, such as 16 Mn etc. Before welding, it is necessary toclean the work piece & remove the impurities such as oil,grease rust and moisture, bake the electrode at the temperature ofabout 350 degree centigrade for one hour. Welding must be carriedout under short arc & is suitable for narrow path. When usedDC, it must be connected with positive polarity.