... type sintered flux; alkalinity is 1.8,spherical particles,granularity is 10-60 mesh;it shows good welding performances:stable arc, fine ... ,oilcans,ships and so on.· ATTENTION : a.Before welding,the welding flux should be baked at the temperature from 300 to 350 ... for 1-2 hours .b.Before welding,the weld metal must be cleared away impurities,such as rust,oil,moisture etc. SUBMERGED-ARC WELDING FLUX