With proper welding wire(H08C,H08MnA,H10Mn2,H08MnMoA,H08Mn2MoA) it can weld a variety of pipeline steels:such as X52,X60,X65,X70 etc.. Used for important welding products, It can be used for multi-layer welding, double-sided single pass welding, multi-wire welding and narrow gap submerged arc welding.Flux type:Fluoride-Basic;Basicity index:1.8;Grain Size:20-0.4mm(10--45meshes).