With proper welding wire (H08A, H08MnA, H08MnMoA0), it can weld ordinary structural steel, boiler steel and pipeline steel, etc., can be used for multi-pass welding, double-sided single-pass welding and multi-wire welding, especially suitable for welding various diameters pipeline.Flux  type:Silicon-Calcium Basicity Index:1.0;Grain size:2.0--0.28mm(10--60meshes)