... excellent low temperature impact toughness.Both AC and DC can be applied and when DC, the wire should be contacted straight polarity ... . APPLICATIONS:·Matched proper wire,e.g.H10Mn2,etc,it is used for welding ... -2 hours .b.Before welding,the weld metal must be cleared away impurities,such as rust,oil,moisture etc. SUBMERGED-ARC WELDING FLUX