... particles,granularity is 10-60 mesh;it shows good welding performances:stable arc, fine appearance of weld,slag easy to remove, ... straight polarity. APPLICATIONS:·Matched proper wire,e.g.H10Mn2,etc,it is used for welding steel structures,such as boilers,pressure ... 1-2 hours .b.Before welding,the weld metal must be cleared away impurities,such as rust,oil,moisture etc. SUBMERGED-ARC WELDING FLUX