Submerged arc welding  is a kind of welding method which takes the arc as the heat source and carries out arc combustion in the welding state. Due to the deep penetration, high productivity, and high degree of mechanization of arc welding, it is suitable for welds of medium and heavy plate structures. Submerged arc welding is one of the most widely used welding methods in welding production, but it can only be wielded at the flat welding position.

The main welding parameters of submerged arc welding include welding current, arc voltage, welding speed, wire diameter, and wire extension length. The welding materials for submerged arc welding include welding wire and flux, which shall be selected according to the mechanical properties and chemical composition of the base metal, groove form, thickness, process conditions, and structural dimensions. Welding wire and flux matching with steel strength can be selected for low alloy steel and low carbon steel, and other standard requirements shall be met at the same time. Carbon steel H08A and H08MnA welding wires, high manganese, and high silicon flux, or H08MnA and H10Mn2 welding wires, matched with low fierce manganese free flux.

Low alloy high strength steel welding wire shall be used for low alloy high strength steel, and sintering flux can also be used when medium fierce medium silicon or low manganese medium smelting flux is selected.